Simoco Wireless Solutions SRM9000AC VHF MOBILE TRANSMITTER User Manual SRM9000 Service Manual 231104
Simoco Australasia Pty Ltd VHF MOBILE TRANSMITTER SRM9000 Service Manual 231104
Contents
- 1. USERS MANUAL 1
- 2. USERS MANUAL 2
- 3. USERS MANUAL
USERS MANUAL 1
Page i
TNM-M-E-0001 Issue 3
SRM 9000 Series
FM VHF/UHF Mobile
Radio Transceiver
SERVICE MANUAL
TNM-M-E-0001
ISSUE 3
November 2004
f
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TNM-M-E-0001 Issue 3
SRM9000 Series FM VHF/UHF Mobile Radio Transceiver TNM-M-E-0001 ~ Iss 3
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TNM-M-E-0001 Issue 3
Declaration
The performance figures quoted are subject to normal manufacturing and service tolerances. The right is
reserved to alter the equipment described in this manual in the light of future technical development.
Copyright
All rights reserved. No part of this publication may be reproduced in any form or by any means without the
prior permission of TMC Radio.
Errors and Omissions
The usefulness of this publication depends upon the accuracy and completeness of the information
contained within it. Whilst every endeavour has been made to eliminate any errors, some may still exist. It is
requested that any errors or omissions noted should be reported to:
TMC Radio Pty Ltd.
1270 Ferntree Gully Road
Scoresby Vic
3179 Australia
Ph: +61 3-9730-3800 (Direct: -3914)
Fax: +61 3-9730-3968
Mob: +61 408-160-661
e-mail: jkuhrt@tmcradio.com
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TNM-M-E-0001 Issue 3
Document History
Issue Date Comments
1 February 2002 Initial issue
2 August 2002 Re-branded to TMC Radio.
3 November 2004 Rev 9 information
List of Associated Publications
Document No. Description Issue
TNM-I-E-0005 SRM9000 Series Installation Instructions 5
TNM-U-E-0012 SRM9020 Trunk Operating Instructions 2
TNM-U-E-0013 SRM9020 PMR Operating Instructions 2
TNM-U-E-0014 SRM9025 PMR Operating Instructions 2
TNM-U-E-0015 SRM9025 Trunk Operating Instructions 2
TNM-U-E-0003 SRM9030 PMR Operating Instructions 2
TNM-U-E-0004 SRM9030 Trunk Operating Instructions 2
TNM-U-E-0020 SRM9030 Brief User Guide 2
TNM-U-E-0042 SRM9010 Brief User Guide 2
TNM-U-E-0043 SRM9020 Brief User Guide 2
TNM-U-E-0044 SRM9025 Brief User Guide 2
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TNM-M-E-0001 Issue 3
Warnings and Cautions
Caution
During disassembly and assembly, refer to Torque Settings in Section 1.7
Caution
Preparing the radio for alignment will erase from the radio all customer PMR and Trunking
configuration data (channel, signalling information etc). The only data retained by the Alignment
Tool is the factory alignment data for the radio (DAC settings for TX power, front-end tuning etc).
WARNING
SRM9000 radio equipment is to be connected only to 12-volt negative earth systems. In vehicles
with a 24-volt supply, an approved 24V/12V converter must be used. The supply must not be
taken from a 12V tap on the battery.
WARNING
To avoid RF injury, do not touch the Antenna when the Transmitter is in use.
WARNING
Double-fused 12V Supply Leads, Antenna cables and Speaker wiring is to be routed as far away
as possible from gas or fuel lines or any electronic control device. The radio transceiver and
antenna are to be mounted as far away as possible from these devices and their cabling.
Equipment is to be installed, by a competent person, in accordance with the requirements of local
radio communications authorities and/or Health and Safety regulations.
Post installation checks should be performed to ensure that there is no effect on the operation of
the vehicle’s electronics.
WARNING
Do not operate your radio, without a handsfree kit, whilst driving a vehicle.
WARNING
Do not operate your radio in an explosive atmosphere. Obey the “Turn Off Two-way Radios”
signs where these are posted, e.g. on a petrol station forecourt.
WARNING
Compliance with RF Energy Exposure Standards: To minimise exposure to RF fields during
equipment service and repair, the antenna terminal of the SRM9000 radio should be connected to
a suitable non-radiating RF load when the transmitter is in use.
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TNM-M-E-0001 Issue 3
GLOSSARY OF TERMS
A summary of common radio terms and some other terms used in this document, and their meanings, are
given below.
3RP Trunking Signalling Specification relating to trunked networks for shared use. Used
primarily for networks in France.
ADC Analogue to Digital Converter.
AFC Automatic Frequency Control.
AGC Automatic Gain Control.
Alarm A selcall sequence sent from a subscriber equipment to indicate an Emergency
situation.
When activated the radio will enter a repeating sequence consisting of an Alarm
Live Transmit Time and an Alarm Dead Receive Time.
Certain special conditions for the radio may also occur during the alarm - see
Conditions during Alarm.
A dedicated SFM (trunked system) that is sent by pressing the Alarm Key.
ANN Abbreviation for Algorithmic Network Numbering. This is the numbering system
where the numbers presented to the radio user can be mapped directly to the
MPT1327 PFIX/IDENTs and vice versa by use of a fixed algorithm in combination
with some other customisation parameters. See also FPP and MEP.
Auto Interrogate An Acknowledge identity sent as a response to an individual reset call.
Automatic Power Feature whereby the transmit power is automatically set to a level determined by
the level of the received signal. This is used to extend the battery life of a Portable.
Automatic Volume Feature whereby the background audio level is monitored and if this is found to be
noisy then the volume level is increased to compensate, allowing the user to hear
better.
Background Hunting The searching for an alternative and 'better' control channel whilst already on a
valid control channel.
BCAST MPT1327 broadcast message. Used to transmit information about the trunked
radio system to radio units.
Busy The state of a channel such that:
• For a non-signalling channel - if Busy this means that the carrier is above squelch.
• For a channel with CTCSS/DCS - if Busy this means a signal is being received with
either no CTCSS tone / DCS code or the correct CTCSS tone /DCS code.
• For a channel with Selcall - if Busy this means a closed channel where the signal is
above squelch.
A feature that equates to 'Do Not Disturb' such that the radio will reject all non-
emergency calls. This feature can be activated using the Busy key (if assigned) or
from a menu; it is reset to disabled at switch on.
C4FM Compatible 4-Level Frequency Modulation.
Call Back A request, sent by the dispatcher, to a unit requesting that the unit calls the
dispatcher back.
CCSC Control Channel System Codeword.
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TNM-M-E-0001 Issue 3
Channel Spacing The distance (in Hz) between the defined frequency channels.
CHEKKER System Interface Specification for Trunked Networks in Germany.
CLIM Call Limit Time; time limit on calls made. Normally this is defined by the Call Time
Limit parameter but can by overridden by the TSC depending upon the setting of
TSCLIM.
CLIME Emergency Call Limit Timer.
Clipboard A temporary storage area in Windows used to store data in cut, copy and paste
operations.
Closed A state where transmit and receive are not allowed until a Selcall message to open
the channel has been received. A Closed Channel is one which defaults (when
selected or after timed reset) to its closed state. Contrast with Open. Normally a
Closed channel would have Selcall Mute and PTT Inhibit would be enabled.
CODEC COde (Analogue to Digital Converter) / DECode (Digital to Analogue Converter).
Community Repeater A communications set-up whereby different groups of radios can operate by using
only one base station. This is achieved by the use of CTCSS tone signalling such
that each group has a different CTCSS tone (encode and decode) and radios can
only communicate with other radios in their group. Only one group of radios can
use the base station at any one time.
Continuous A continuous control channel is one that is only used by one site. There are no
breaks in the transmission of signalling. Emergency Call Time Limit
Control Channel A channel used for the transmission of messages that enables the TSC to control
radios. Control channels may either Continuous or Timed Shared.
Control Channel Burst A feature that enables control channel burst transmissions on systems using time-
shared control channels. It is unavailable if the control channel acquisition type is
not 'Time Shared'. To make available: go to Control Channel Acquisition Type and
set to Time-shared.
CTCSS CTCSS stands for Continuous Tone Controlled Signalling System. A continuous
tone (lower than the audio range of the receiver) is modulated onto the carrier as
well as other signalling or voice traffic. Compare with DCS. Only receivers which
have been instructed to recognise the same CTCSS tone are able to receive the
transmissions, since the squelch of receivers looking for different CTCSS tones
prevents the audio from being heard. This provides a simple method of sending
messages to selected receivers only and allows several different networks to use
the same frequencies. CTCSS is also known as Tone Lock or Tone Squelch.
DAC Digital to Analogue Converter.
Dash (-) digits Digits known as 'No Tone' digits used in Selcall Identities.
DCS Digital Coded Squelch system is based on sending a continuous stream of binary
codewords using, low deviation, direct frequency shift keying. Only receivers which
have been instructed to recognise the same DCS sequence are able to open their
squelch and receive the associated speech transmissions. This provides a simple
method of sending messages to selected receivers only and allows several
different networks to use the same frequencies.
Decode Reception of signalling. Either Selcall where encoded tone frequencies are
decoded and identified as specific tones digits or CTCSS/DCS where tones are
analysed to see if the channel should be opened.
Demanded Demanded Registration; a procedure in which the TSC forces a single radio unit to
attempt registration immediately (providing the radio is not already attempting to
register).
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TNM-M-E-0001 Issue 3
Disabled The 'False' state of a parameter. That indicates this parameter is not active.
Typically this state is represented by an unmarked check box. Compare with
Enabled.
DSP Digital Signal Processor.
DTMF Abbreviation of Dual Tone Multi-Frequency signalling. Used to dial into Telephone
networks using tone dialling.
Dual Watch A facility that enables the Radio to periodically monitor another channel for a signal
above squelch. Typically applications are checking an emergency channel whilst on
another channel.
Dynamic User Groups These groups use a temporary user Ident to group a number of units together who
would not normally make up a group. These groups are formed by the TSC
(contrast with User Defined Groups) sending a special message to units instructing
them to add a new group Ident to their list of groups. Up to 8 groups can be
defined. These temporary groups are lost at switch off unless 'Save Groups at
Switch Off' is enabled.
Economiser A process by which the Receiver is powered down whilst there is no received
signal. Periodically the receiver is powered up to check for such a signal. This is
used to extend the battery life of a Portable.
Enabled The 'True' state of a parameter. That indicates this parameter is active. Typically
this state is represented by a mark (either a tick or a cross) in a check box.
Compare with Disabled.
Encode Transmission of signalling. Either Selcall where selcall tone digits are encoded into
tone frequencies or CTCSS/DCS where tones modulated onto the channel's
carrier.
ETS European Technical Standard.
External Alert A facility for switching on various ancillary devices to meet customer's individual
requirements (e.g. car horn, flashing lamp etc.) when 'called'.
Only available on a mobile radio. To make available: go to Hardware Components,
Terminal Settings and set Product Type to a Mobile type.
Fallback A mode of operation that may be entered when the Network is suffering a
malfunction. During this mode certain facilities (e.g. PSTN) may not be available.
FFSK Fast Frequency Shift Keying. This is a signalling system for the transfer of digital
information. It works by using one of two audio tones to represent data being
transmitted.
Fleet A group of units formed such that only a shortened form of dialling (2 or 3 digits) is
required between them. These groups are normally assigned contiguous ident's.
FOACSU Full Off Air Call Set Up. A method of call set-up where the calling party has to
manually answer the incoming call before the trunking system will allocate a traffic
channel to the call. This reduces the loading on traffic channels as it prevents them
being allocated to calls when the called party is not present to deal with the call.
FPGA Field Programmable Gate Array.
FPP Field Personality Programmer.
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Hash (#) digits These digits are used for two purposes:
• For Selcall identities (encode and decode) - known as User Id digits. These digits
are replaced by the user id entered at switch on (if enabled)
• Use in DTMF dialled strings - their use is network dependent to access special
services.
IDENT A 13 bit number used for Identification purposes. Associated with a Prefix (PFIX)
this forms a 20 bit address which is used for identification purposes in signalling
between the radio and the trunking system.
Identity Name given to a sequence of tones which is used in sequential tone signalling. See
Valid Selcall Digits.
Idle State The state of the radio when it is not in a call.
Inaccessible A state of a channel such that it is unavailable to the user through normal methods
of channel selection. Therefore inaccessible channels will not appear on the
channel menu.
Include Calls These type of calls are used to allow a 3rd party to join into an existing call.
Link Establishment A delay incorporated into the start of every selective call or DTMF transmission
Time which allows for the finite delay of the radio equipment in responding to any radio
signal. This includes both the commencement time of the originating transmitter
and the response time of the receiver.
Locked A state of a channel whereby it is not possible to change channels using the normal
up/down keys on the channel menu until the OK key is pressed. See Auto Channel
Selection Lock.
MEP Miniaturisation Extent Parameter. Used in systems that use ANN numbering.
Modifier Part of a dialled string that modifies the nature of the call made to a number (e.g.
dialling "*9" before the number that is to be dialled will modify the call to be an
emergency call).
MPT1327 A signalling standard for Trunked Private Land Mobile Radio Systems. Defined for
systems in the UK but also used outside the UK. Issued January 1988.
MPT1343 A System Interface Specification for commercial Trunking networks. Defined for
systems in the UK but also used outside the UK. Issued January 1988.
NDD Network Dependent Data. This is a field within the CCSC codeword that is used by
the trunking system to identify information about the trunking network and, in
particular, information specific to the site that is radiating the control channel. It is
used by the radio when it is acquiring a control channel to identify valid channels.
Null Id A selcall identity that is not defined and whose tones' field is displayed as a blank.
Open A state where transmit and receive are allowed. The channel is no longer open
when reset. Contrast with Closed.
Normally an Open channel would not have Selcall Mute and PTT Inhibit would be
disabled.
OPID Network Operator Identity used in Regional Systems. See Roaming.
PABX Private Automatic Branch Exchange.
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Password An optional password system available on the radio. This feature is only available if
the radio does has a display and a keypad. To make available: go to Hardware
Components, Terminal Settings and set Product Type to one which has a display
and a keypad.
PFIX The 7 most significant bits of an MPT1327 address number. Normally same fleet
units have same prefix. Relates to individual and group address numbers.
PLL Phased Locked Loop.
PMR Private Mobile Radio (not normally trunked).
Priority Channel A channel in a search group that is scanned between every other channel.
PSD Peak System Deviation.
PSTN Public Switched Telephone Network
PTT Press To Talk. This is the term given to the operator’s key normally used to
commence transmitting a message.
PTT Inhibit A state whereby transmission using the PTT is not allowed. Also know as Tx
Lockout.
Queuing The storing of an Selcall Identity for later transmission.
If inhibited from transmitting a selcall sequence because the channel is busy then
the radio can queue the Send 1 / Send 2 sequence for later transmission. When a
radio unit is in Queuing mode all incoming calls are stored automatically in a queue
for later examination. The caller is given an indication that the call has been
queued by the called party. The queue will contain the identity of the caller and the
status value received (if a status call). Up to 20 calls may be queued. The Queuing
mode may be selected using the Modes Menu.
Note: Connecting a MAP27 device to a radio that is in queuing mode will disable
queuing. All incoming calls will then be routed both to the radio user interface and
to the MAP27 device connected to the radio. Also known as Logging Mode
Reference Frequency Normally this is generated from a high stability crystal oscillator reference and is
divided digitally in a frequency synthesiser for comparison with other frequency
sources, e.g. a VCO.
Registration Registration is a technique used to ensure that the trunking system knows the
location of radio units that are using the system. This allows the system to setup
calls quickly without having to search the whole system for the called radio.
Repeat Tone A selcall tone that is used to replace repeated tones. Fixed at tone E.
Example: An identity entered as '12333' would be sent by the radio as '123E3'.
Reset Resetting is caused by Three Tone Reset, a Remote Reset, an Individual reset or a
Group reset (Call Types in Decode Identity). When a radio is reset the effect on the
radio will be as follows:
• Any Call Alerts will be stopped
• The Call LED flashing will stop
• If the channel is in Open mode then the channel is closed
• The PTT is optionally inhibited see PTT Inhibit After Reset Sequence.
• In searching - if paused on a selcall channel then searching resumes
• If the Acknowledge property of a Decode Identity is set to 'Auto Interrogate' or
'Transpond & Auto Interrogate' then the Auto Interrogate encode identity is
transmitted.
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Roaming This is a process that allows changing between regional trunking systems which
have different Operator Identities (OPID 's). Not allowed on MPT1343 Systems.
RSSI Received Signal Strength Indicator.
Scanning Process of switching between the channels in the nominated search group in cyclic
sequence, stopping when the search condition (which may be to look for either a
free or a busy channel) is satisfied.
SDM Short Data Message.
Search Group A group of channels that are either scanned for a signal above the search threshold
or are compared and voted for the strongest signal
Selcall Selective Calling - a system of signalling which allows 'dialling up' of specific
mobiles, portables and controllers. Such a system may be used to pass messages
as a data message to a specific user or group of users. It can be used to provide
remote switching facilities and to provide access control into community repeaters
or similar devices.
Selcall Mute A state of the audio gate whereby the loudspeaker is muted (closed).
Selcall System Selective Calling, uses a tone sequence at the start, and end, of a call to control
which members of a fleet react to the transmission.
SFM Short Form Memory.
Sidetone Sidetone is the audio which can be (optionally) heard when Selcall, DTMF and
toneburst transmissions are made.
Simplex Mode of operation whereby the radio operates as a conventional fixed channel
radio outside the Trunking network.
Squelch System used to prevent weak, unintelligible signals and random noise from being
heard by a radio operator while still allowing intelligible signals to be received
normally. This is accomplished by the use of a threshold below which any received
signals are ignored. Only signals whose signal-to-noise ratio is above the squelch
level cause the audio circuits of the radio to be enabled, with the result that only
satisfactory signals are received. The squelch level is specified in SINAD.
Star (*) digits Digits known as Status or Message digits. These digits are used for three
purposes:
• Status Digits for Selcall Identities
• Wildcard digits in Status strings
• Use in DTMF dialled strings - their use is network dependent to access special
services.
Status A feature whereby a radio's status (or usually the status of the radio's user) can be
transmitted and a status message from other radios can be displayed. This
operates through status digits in selcall identities. Either in Encode Identities or
Decode Identities as follows:
Encode Identities: Status digits within the identity are used to transmit the current
situation of the radio's user (E.g. "Out To Lunch").
Decode Identities: Status digits are looked up in a table (Status Menu) for possible
messages to display.
SW Software.
SYS System Identity Code part of the CCSC.
TCXO Temperature Compensated Crystal Oscillator.
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Temporary Temporary Registration; a process carried out by the Dispatcher due to some
system failure that prevents it from carrying out normal registration. The radios will
recognise this temporary registration mode but will otherwise use the network in the
same way as if they were registered. They may be required to re-register when
normal registration mode is resumed.
Three Tone Reset This is a system whereby a call to a user automatically reset all other users in a
group.
Example: a call to user '12345' would call 12345 and reset all other users on this
channel with an identity 123nn where n can be any digit 0-9, A-F.
Timed Reset Facility that causes the Radio, after a certain period of time, to restore current
channel to it's initial condition e.g. if it was previously searching it will resume
searching.
Time Shared A time-shared control channel is one which is used by more than one site. This
allows a wide coverage area to be obtained using only one frequency.
The forward channel from the TSC to the radio is divided into timeslots. Each site
using the channel is allocated one timeslot in which to transmit and send signalling.
Therefore, when on a timeshared channel. the radio may be able to receive bursts
of signalling from different sites at different signal strengths and may receive
periods when no signalling is received.
Depending on the type of system, the radio may be able to perform transactions
with any site it can receive from or only with a specific site.
TMR Trunked Mobile Radio.
Tone Burst An audio tone is transmitted at the start of transmission to inform a relay (repeater)
station to switch itself on to relay the transmission.
Transpond An Acknowledge identity sent as a response to an individual call.
TRAXYS Air Interface for the PTT Telecom Trunked Radio Network, used in the
Netherlands.
TSC Trunking Site Controller. Central control required for the Trunking System to
function. Controls base stations.
Tx Inhibit A facility which prevents the user from transmitting,(other than alarms), while the
channel is Busy.
UMP User Memory Plug. A special device which contains the customisation data for the
radio. If this is removed then this can cause the radio to behave in a number of
ways.
User Defined Groups These groups are set up by the user (contrast with Dynamic User Groups) when
the user desires to be included, temporarily, in an existing group. Up to 8 groups
may be defined (in addition to the Network group Idents defined by Network Group
Numbers). This feature is only available if User Defined Groups parameter is
enabled. These temporary groups are lost at switch off unless 'Save Groups at
Switch Off' is enabled.
User Identity This is a sequence of up to four digits entered by the user when the Radio is
switched on, if this option is programmed. These digits are then substituted into any
transmitted selcall identity which includes # digits.
VCO Voltage Controlled Oscillator.
Vote Method used to compare the signal strength on a current channel with another
specified channel and then to choose the channel having the stronger signal.
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Voting Feature used during searching when there is more than one channel which
satisfies the required conditions. It involves examining all the channels which
satisfy the required conditions, and then selecting the channel with the highest
signal strength.
VOX Voice Operated Transmit.
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Table of Contents
DECLARATION............................................................................................................................................III
COPYRIGHT ................................................................................................................................................III
ERRORS AND OMISSIONS ........................................................................................................................III
DOCUMENT HISTORY............................................................................................................................... IV
LIST OF ASSOCIATED PUBLICATIONS .................................................................................................. IV
WARNINGS AND CAUTIONS ..................................................................................................................... V
GLOSSARY OF TERMS............................................................................................................................. VI
TABLE OF CONTENTS.............................................................................................................................XV
1. INTRODUCTION..............................................................................................................................1.1
1.1 GENERAL......................................................................................................................................1.1
1.2 SCOPE..........................................................................................................................................1.1
1.3 DESCRIPTION................................................................................................................................1.1
1.4 PRODUCT VARIANTS AND FACILITIES .............................................................................................1.2
1.5 SOFTWARE VERSIONS AND NAMING ...............................................................................................1.5
1.5.1 Filename Structure.................................................................................................................1.5
1.5.2 Application Code ....................................................................................................................1.5
1.5.3 Software Type Code ..............................................................................................................1.5
1.5.4 Version Number .....................................................................................................................1.6
1.5.5 Exclusions ..............................................................................................................................1.6
1.5.6 Displaying Software Versions.................................................................................................1.6
1.5.7 Automatic Version Upgrade Prompting..................................................................................1.7
1.5.8 Transceiver SW Description, Start-up and Backup-Software................................................1.8
1.5.9 Wailing Siren (Boot-up Software Corrupted)..........................................................................1.8
1.6 ADJUSTMENT AND ALIGNMENT.......................................................................................................1.9
1.7 TORQUE SETTINGS........................................................................................................................1.9
1.8 SPECIFICATION..............................................................................................................................1.9
1.8.1 General ..................................................................................................................................1.9
1.8.2 Transmitter...........................................................................................................................1.10
1.8.3 Receiver...............................................................................................................................1.11
1.8.4 Signalling..............................................................................................................................1.12
1.8.4.1 CTCSS..................................................................................................................1.12
1.8.4.2 FFSK.....................................................................................................................1.13
1.8.4.3 Selcall ...................................................................................................................1.13
1.8.4.4 DTMF....................................................................................................................1.15
1.8.4.5 DCS ......................................................................................................................1.16
1.8.4.6 C4FM………………………………………………………………………………………1.2
1.8.5 Environmental ......................................................................................................................1.17
2. SERVICE PHILOSOPHY .................................................................................................................2.1
2.1 SERVICE CONCEPT........................................................................................................................2.1
2.2 WARRANTY ...................................................................................................................................2.1
2.2.1 Service Within and Out Of Warranty......................................................................................2.1
2.2.2 Ancillary Items........................................................................................................................2.1
2.3 SOFTWARE POLICY .......................................................................................................................2.1
3. TECHNICAL DESCRIPTION...........................................................................................................3.1
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3.1 RECEIVER.....................................................................................................................................3.1
3.1.1 Front End Filters and RF Amplifier.........................................................................................3.1
3.1.2 First Mixer and IF Section......................................................................................................3.1
3.1.3 Quadrature Demodulator .......................................................................................................3.1
3.1.4 Receiver Audio Processing....................................................................................................3.3
3.2 TRANSMITTER ...............................................................................................................................3.4
3.2.1 Drivers and PA Stages...........................................................................................................3.4
3.2.2 Power Control ........................................................................................................................3.4
3.2.3 Antenna Changeover and Harmonic Filter.............................................................................3.4
3.2.4 Transmitter Audio Processing................................................................................................3.4
FREQUENCY SYNTHESISER .......................................................................................................................3.6
3.2.5 General ..................................................................................................................................3.6
3.2.6 PLL.........................................................................................................................................3.6
3.2.7 VCO .......................................................................................................................................3.6
3.2.8 Negative Bias Generator and Loop Filter...............................................................................3.6
3.2.9 Phase Modulator....................................................................................................................3.6
3.2.10 Reference Oscillator ..............................................................................................................3.7
3.3 CONTROL .....................................................................................................................................3.9
3.3.1 DSP and FPGA......................................................................................................................3.9
3.3.2 DSP Clock Oscillator..............................................................................................................3.9
3.4 MEMORY ......................................................................................................................................3.9
3.5 POWER SUPPLIES .......................................................................................................................3.11
3.5.1 Power On Function ..............................................................................................................3.11
3.5.2 Power Supplies ....................................................................................................................3.11
3.5.2.1 +8V Regulator U900.............................................................................................3.11
3.5.2.2 +5V Regulator U901.............................................................................................3.11
3.5.2.3 +3.3V Regulator U912..........................................................................................3.12
3.5.2.4 +2.5V Regulator U903 .........................................................................................3.11
3.5.2.5 Negative Power Supply U904E/F .........................................................................3.12
4. ALIGNMENT (LEVEL 3 SERVICE ONLY)......................................................................................4.1
4.1 TEST EQUIPMENT..........................................................................................................................4.1
4.2 TEST SET-UP ................................................................................................................................4.3
4.2.1 COMMS Set up......................................................................................................................4.4
4.2.2 Radio Preparation ..................................................................................................................4.5
4.2.3 Alignment Procedure .............................................................................................................4.6
4.2.3.1 VCO DAC Alignment ..............................................................................................4.6
4.2.3.2 TCXO (Radio Netting Adjustment) .........................................................................4.7
4.2.3.3 RX Front End.............................................................Error! Bookmark not defined.
4.2.3.4 Mute Adjustment.....................................................................................................4.9
4.2.3.5 RSSI .....................................................................................................................4.10
4.2.3.6 TX Power..............................................................................................................4.11
4.2.3.7 Modulation ............................................................................................................4.12
4.2.3.8 Programming........................................................................................................4.13
4.2.3.9 Customers Radio Configuration Data...................................................................4.13
5. REPLACEABLE PARTS..................................................................................................................5.1
5.1 COMMON PARTS ...........................................................................................................................5.1
5.2 BAND-SPECIFIC PARTS .................................................................................................................5.2
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APPENDICES
APPENDIX A ~ TRANSCEIVER CONNECTIONS
APPENDIX B ~ SRM9010 MICROPHONE
APPENDIX C ~ SRM9020 MICROPHONE
APPENDIX D ~ SRM9025 HANDSET
APPENDIX E ~ SRM9030 CONTROL HEAD
APPENDIX F ~ ANCILLARIES
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TNM-M-E-0001 Issue 3
1. INTRODUCTION
1.1 GENERAL
The SRM9000 series of FM mobile radio transceivers is designed for PMR and Trunked operation in VHF
and UHF radio systems.
The system is available in a number of functional variants. Each variant uses the standard SRM9000 mobile
transceiver, which is software configured for different control ancillaries. The software configuration together
with the type of controller (Basic or Enhanced microphone, Handset, or Alphanumeric Control Head)
determines the radio features for the different variants as follows.
PMR/Trunked
Basic Telemetry Transceiver No Display or Control Head. SRM9005
Low Range Version with Basic Fist Microphone. SRM9010
Mid Range Version with Enhanced Alphanumeric Fist Microphone. SRM9020
High-end Version with Alpha Display Handset. SRM9025
System Level Remote Control Head with Alpha capability and Handset / Fist
Microphone / Desk Microphone options. SRM9030
1.2 SCOPE
This manual provides technical specifications, description and servicing details for the SRM9000 series of
mobile radio transceivers together with the related microphones and control heads.
Unless specifically stated otherwise, the text and illustrations refer to all versions in the series.
1.3 DESCRIPTION
The design concept utilises wide band analogue techniques for RF transmit and receive circuitry with digital
signal processing analog or digital modulation and demodulation. Electronic tuning is used throughout the
mobile to eliminate manual tuning and level adjustment.
A Digital Signal Processor (DSP) and a Field Programmable Gate Array (FPGA) are used with other
dedicated devices in the SRM9000 to perform the following functions under software control:
• Frequency Synthesis of all operating frequencies.
• Modulation and demodulation of 10/12.5/20/25kHz FM signals on a per channel basis.
• Modem functionality for specified data modulation schemes.
• Filtering, pre-emphasis, de-emphasis, limiting, compression, muting, CTCSS, Selcall or any other
frequency or level dependent signal modification.
• Serial communications with the Control Ancillaries and Alignment Tool.
• Tuning Control data for TX and RX.
The SRM9000 Transceiver comprises a rugged extruded aluminium sleeve, which houses a single printed
circuit board assembly and provides all heatsink requirements. The sleeve housing is closed at each end by
high-impact plastic end caps; all cable ports and mechanical interfaces are sealed against moisture and dust
ingress.
The PCB assembly comprises a single, multi-layer PCB containing all the RF and control circuitry. The PCB
seats on an extruded aluminium tray that slides into the outer aluminium sleeve where it is secured with
screws accessed from the outside of the case. Provision is made under the main PCB tray assembly for
additional hardware options.
There are two installation methods available for the SRM9000. The outer aluminium extrusion has side
flanges that allow the mobile to be bolted directly to any flat surface in the vehicle. A quick release cradle is
also available.
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1 ~ INTRODUCTION
1.4 PRODUCT VARIANTS AND FACILITIES
Product variants and facilities are detailed in Table 1-1, Table 1-2 and Table 1-3.
Table 1-1 Common Features for All Variants
Feature: Model: 9005 9010 9020 9025 9030
Control None or Serial
or Parallel if
Option Board
Display
Microphone Display
Microphone Display
Handset Control Unit
with
Microphone
Display - 1 digit LED 6 char LCD 2x12 char LCD 8x14 char
graphic LCD
Adjustable Display
Illumination
- - Yes Yes Yes
Buttons and Keys - Vol Up/Down
Select
1 Function
Vol Up/Down
4 Function
Scroll Up/Down
Vol Up/Down
6 Function
12 Keypad
Send/End
Menu + Scroll
6 Function
12 Keypad
Send/End
Menu + Scroll
Speaker - Yes Yes Yes* Yes*
Frequency Bands 66-88MHz, 136-174MHz, 174-208MHz, 208-245MHz, 335-375MHz,
400-450MHz, 440-512MHz, 470-530MHz
Channel Spacing 10/12.5/20/25kHz
Menu driven - - Yes Yes Yes
Customisable Menus - - Yes Yes Yes
* Note: Handsets have a built-in earpiece therefore an external speaker is optional.
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Table 1-2 Conventional-PMR Variants
Feature: Model: 9005 9010 9020 9025 9030
Channels 1000 10 100 + 1000 1000
Signalling CTCSS / DCS CTCSS / DCS
ANI CTCSS / DCS
Selcall CTCSS / DCS
Selcall CTCSS / DCS
Selcall
Attack Operation - Yes Yes Yes Yes
DTMF Encode - Fixed Seq Fixed Seq Yes Yes
PTT Limit Timer with
warning beeps
Yes
PTT Inhibit on Busy Yes
Voting Yes
Scanning Yes 10 fixed groups 124 fixed,
4 user
124 fixed,
4 user
124 fixed,
4 user
Priority Scanning Yes
Nuisance Delete - - Yes Yes Yes
Multiax Yes
Mod/Demod Fctn Option - - - -
Ignition Sense Input Yes
VOX Handsfree Option Option Option Yes Option
General External IO Option Option Option Option Option
600 Ohm Interface Option Option Option Option Option
Internal GPS Option Option Option Option Option
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1 ~ INTRODUCTION
Table 1-3 Trunked Variants
Feature: Model: 9005 9010 9020 9025 9030
Channels 1024 channels in 50 sub-bands
Frequency Bands Specifically : 136-174MHz, 400-450MHz (and possible in all other bands)
Background Hunt
and Vote-Now
Yes Yes Yes Yes Yes
MPT1343 dialstrings Yes Yes Yes Yes Yes
ANN Numbering - - - Yes Yes
Memories 250 10 100+ 250 250
User Phonebook - - Yes Yes Yes
Alpha Status List - - Yes Yes Yes
SDM/EDMs Yes - - Yes Yes
NPDs Yes - - TBA TBA
Mod/Demod Fctn Option - - - -
Attack Operation Yes Yes Yes Yes Yes
Ignition Sense Input Yes Yes Yes Yes Yes
VOX Handsfree Option Option Option Yes* Yes*
General External IO Option Option Option Option Option
600 Ohm Interface Option Option Option Option Option
* Note: Requires external microphone for optimum performance.
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1.5 SOFTWARE VERSIONS AND NAMING
There are various associated items of Software (SW) required for the SRM9000 radio and programmer to
operate. This section simply defines the naming rules of the SW files to allow identification and conformity.
This allows different versions of SW to be distributed and co-exist without confusion.
The SRM9000 Transceiver has three items of SW for digital and analog PMR, Trunking and Alignment.
The 9030 Control Head has two SW files for its Flash and EEPROM.
1.5.1 Filename Structure
Basically the Filename Structure is defined as follows:
• 2-character Application code
• 2-character SW Type code
• 3-character version number
• File Extension as required.
eg. 9kTm103.BIN
9kP_105.BIN
9kS_103.BIN
9kCf101.HEX
9kCe101.HEX
1.5.2 Application Code
This identifies the application the SW was initially designed for:
9k = Standard SRM9000 Software
Rw = Specific SW for Raywood Taxi Applications
1.5.3 Software Type Code
This identifies different types of SW within an application.
Td = Trunk Data = 9005 Transceiver-only code
Tb = Trunk Basic = 9010/20 Basic Mic code
Tm = Trunk MPT = 9025/30 MPT-Numbering code
Ta = Trunk ANN = 9025/30 ANN-Numbering code
P_ = Conventional PMR code
S_ = Startup code (for alignment and startup)
Bo = Transceiver Boot-code
Bc = Transceiver Boot-Backup-code
Bf = Transceiver FPGA-code
Ba = Transceiver FPGA-Backup-code
Cf = 9030 Control Head FLASH code
Ce = 9030 Control Head EEPROM code
Cp = 9030 Control Head PIC code
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1.5.4 Version Number
This is a 3-digit number allocated by Engineering to identify the SW version.
e.g. 103 = Version 1.03
1.5.5 Exclusions
The Programmer SW does not follow the above rules as it is a PC based Program and its version number
can be easily identified by starting the SW. Later releases of SW will be backward compatible, unless
deliberately not so, in which case a different directory structure/path may be implemented.
1.5.6 Displaying Software Versions
Each Transceiver SW code file (e.g. 9kTm258.BIN, etc.) contains version information about itself and
possibly compatible Programming SW.
For Radio SW saved on Disk, this information can be displayed via the Programmer function:
Options : Upgrade_Software : Get_File
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For Software loaded in the radio, information can be read from the Transceiver and displayed via the
Programmer function:
Options : Radio_Information
SRM9030 Control Head SW can be displayed on the Control Head by holding the ‘3’ button down when the
radio is switched on. This is only implemented in CH V1.06 SW (Oct/2000) and later.
SRM9025 Handset SW has a similar method of Version identification.
SRM9020 Microphone SW has a similar method of Version identification.
SRM9010 Microphone does not have any method of determining loaded SW. There is only one version of
this SW in the field.
1.5.7 Automatic Version Upgrade Prompting
When a configuration is downloaded to the Transceiver, the Programmer performs a brief check on the SW
currently installed in the radio. If a later version of SW exists (on PC hard-disk) then the Programmer will
prompt the user with the following message:
If YES is selected, the Transceiver Radio code is updated before the new configuration is downloaded.
If NO is selected, only the configuration is downloaded.
This only applies for standard SRM9000 SW - i.e. for Startup-Code (9kS_….BIN), Trunking-Code (9kTa…,
9kTm…, 9kTb…, 9kTd….BIN) and PMR-Code (9kP_….BIN).
This process also updates the Startup-Code code to ensure it is compatible with the loaded PMR or Trunk-
Code.
Note : If the …\SRM9000\FPP\RadioSW folder contains no files, then the above check will not be
performed.
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1.5.8 Transceiver SW Description, Start-up and Backup-Software
The SRM9000 Transceiver software is split into the following separate modules:
• Bootloader and Backup Software
• Start-Up Software
• FPGA and FPGA-Backup Software (FPGA = Field Programmable Gate Array)
• Mainline PMR Software
• Mainline Trunk Software
When the Transceiver starts, it basically performs the following steps:
• Initial execution starts with the Bootloader code, which attempts to load the Start-Up Software (if
Start-Up checksum is bad, then the Backup Software is loaded.)
• Start-Up Software then downloads the FPGA code (or FPGA-Backup code if FPGA checksum is
bad) to the FPGA device. If both FPGA and FPGA-Backup checksums are bad then the radio is
not operational and serial communication is not possible.
• Start-Up Software then reads the On/Off switch plus Ignition-Sense lines and compares these with
saved parameters to determine if the radio should be continue to power-up or switch itself off
again.
• Start-Up software then attempts to load either PMR or Trunk Mainline Software (dependent on
saved parameter) and switches execution to complete the power-up process and start normal
operation.
If the Mainline Software cannot be loaded, or a Jobfile configuration has not been loaded (e.g. non-existent
or checksum fail) then execution switches to Backup Software until the error is corrected (e.g. by FPPing the
radio).
There are three states that the radio can configure after switch-on:
• Mainline Trunk Software or Mainline PMR Software (normal power-up)
If the radio does not have a valid Jobfile configuration loaded, then it will display a “No PMR Cfg” or
“No TMR Cfg” message.
• Start-Up Software (characterised by “Alignment Mode” shown on the display). This is also the
code that is running when the radio is being aligned using the Alignment Tool.
• Backup Software (via various paths from above.)
1.5.9 Wailing Siren (Boot-up Software Corrupted)
A “WAILING SIREN” sound is emitted from the Loudspeaker while the radio is running in Boot Backup
Software. In this mode the FPP can be used to re-load a Jobfile, or re-load Start-Up or Mainline Operating
Software.
Simply writing a Jobfile to the radio should allow the FPP to determine and update the offending software –
however there may be instances where the FPP cannot determine this and the Start-Up and Mainline
Software should be updated manually. This can be done using the FPP : Upgrade_Software : Get_File …
then Download. Both Start-Up Software (filename = 9kS_xxx.BIN) and Mainline PMR (9kP_xxx.BIN) or
Trunk (9kTxxxx.BIN) should be loaded if the FPP cannot automatically fix the problem. The wailing siren
should stop once the problem is fixed.
Note 1: Backup Software prior to V1.05 (~Apr 2000) does not enable the +13.8V power line to the Control
Unit / FPP-Cable. This means that when the wailing Siren tone is present, power needs to be
externally supplied to the FPP Cable in order to re-load any Software.
Note 2: Backup Software V2.10 (~Oct 2000) improved operation protecting the radio FLASH from
irrecoverable corruption if a download was inadvertently terminated prior to completion. Care should
be exercised when programming radios operating in Backup Software (i.e. with wailing siren
sounding) prior to V2.10, so that downloads are not aborted accidentally.
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Note 3: Shorting pin-2 (to ground) of the main FLASH Memory IC, when power is applied to the radio, will
also force the radio to startup in Backup Software. This may be useful in some situations.
Note 4: Should these steps fail to restore the set and the Wailing Siren cease, the radio will need to be
returned to a Level 3 Service Centre for FLASH replacement.
1.6 ADJUSTMENT AND ALIGNMENT
There are no manual internal adjustments in the SRM9000. Re-programming and alignment is done with the
unit installed using software tools. For servicing, the radio PCB can be operated as a stand alone unit
provided a temporary heatsink is fitted under the transmitter PA module for transmitter servicing and that the
receiver audio output be kept below 100mW for receiver servicing. Radio performance is not adversely
affected by operating without the outer sleeve but there will be some change to performance when the metal
cans are removed from the RF sections of the board.
On re-assembly, the PA module should be checked for a thin layer of heat-conducting paste. If this is missing
or dried-out, it should be replaced prior to re-assembly.
1.7 TORQUE SETTINGS
Assembly of 'Chassis' (Inner Extrusion) to 'Outer Extrusion' 8-10 Lb/In (0.90 - 1.13 Nm).
Assembly of 'Front' and 'Rear' end-caps to 'Outer Extrusion' 13-14 Lb/In (1.47 - 1.58 Nm).
1.8 SPECIFICATION
1.8.1 General
Operation
Single or two frequency simplex (half-duplex).
Modulation
Frequency modulation (phase) F3E, F1D, F1E.
Supply Voltage Requirements
10.8 to 16.2V DC negative earth (13.8V nom.)
Current Consumption
Mobile With Control Mic Mobile With Alpha Mic Mobile With Alpha
Head
Radio off ≤ 5mA ≤ 5mA ≤ 5mA
Standby(squelched): ≤ 200mA ≤ 210mA ≤ 210mA*
RX Audio O/P:
300mW (not bridged) ≤ 450mA ≤ 470mA ≤ 500mA *
4.0W ≤ 1200mA ≤ 1220mA ≤ 1250mA*
Transmit: VHF UHF
25W ≤ 7.5A ≤ 7.5A
1W ≤ 2.5A ≤ 2.5A
*Add 250mA to current consumption for Control Head with backlight on.
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Frequency Bands Frequency Range Band Frequency Range
E0 66 - 88 MHz R1 335 - 375MHz
AC 136 - 174MHz TK 400 - 450MHz
K1 174 - 208MHz UW 440 - 512MHz
KM 208 -245MHz WR 470 - 530MHz
Switching Bandwidth
Radio covers the complete band without retuning
Channel Spacing
10/ 12.5 / 20 / 25kHz
Frequency Stability
Better than ±2.0ppm
Dimensions (mm) Height Width Depth
Transceiver
9030 Alpha Control Head
9025 Alpha Display Handset
9020 Alpha Mic
9010/30 Microphone
9030 Desk Microphone
9030 Handset
56
65
165
96
82
300
200
170
188
52
68
57
120
50
165
45
30
44
38
130
40
Weight
Transceiver 1.8kg
1.8.2 Transmitter
Power Output
High Power: 25W Adjustable down to 1W
Low Power: 1W Adjustable up to 25W
Transmitter Rise Time
Less than 40 ms
Duty Cycle
1 minute transmit : 4 minutes receive
Spurious Emissions
< 0.25uW (9kHz to 1GHz)
< 1.0uW (1GHz to 4GHz))
Residual Noise
60% deviation. CCITT Weighted
25kHz Channel Spacing >45dB
12.5kHz Channel Spacing >40dB
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Audio Frequency Distortion
≤ 3% (at 60% deviation)
Audio Frequency Response
300 to 3000Hz* +1dB -3dB
Figures apply for a flat audio signal or a 6dB/octave pre-emphasis curve
(*2550Hz 12.5kHz channel spacing)
1.8.3 Receiver
Sensitivity
≤ 0.3µV PD (-117.5dBm) for 12dB SINAD
≤0.4µV PD for 20 dB Quieting.
Adjacent Channel Selectivity
25kHz Channel Spacing > 73dB
12.5kHz Channel Spacing > 65dB
Intermodulation Rejection
ETS Method > 65dB
AS4295 Method > 70dB
Spurious Response Rejection
> 75dB
Blocking
> 95dB ( ±1MHz)
Conducted Spurious Emissions
< 2nW (-57dBm) 9kHz to 4GHz
FM Residual Noise (CCITT weighted)
25kHz : > 45dB
12.5kHz : > 40dB
Mute Range
Typically 6 to 25dB SINAD
Typical setting 10 to 12dB SINAD
Mute Response Time
<30mS (no CTCSS)
add 200mS for CTCSS
Voting Response Time
Searches at 50ms/channel
Audio Distortion
< 3% (1W / 4ohm, 60% modulation)
<5% (4W / 4ohm, 60% modulation)
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Audio Frequency Response
300 to 3000Hz*, +1dB to -3dB
Figures apply for a flat audio response or a 6dB/octave de-emphasis curve
(*2550Hz for 12.5kHz channel spacing)
1.8.4 Signalling
1.8.4.1 CTCSS
All 38 standard CTCSS Tones are supported as per the table below.
Identifier Frequency Identifier Frequency Identifier Frequency
Q 67.0 C 107.2 0 167.9
R 71.9 L 110.9 1 173.8
S 74.4 D 114.8 2 179.9
T 77.0 M 118.8 3 186.2
U 79.7 E 123.0 4 192.8
I 82.5 N 127.3 5 203.5
V 85.4 F 131.8 6 210.7
A 88.5 O 136.5 7 218.1
W 91.5 G 141.3 8 885.7
J 94.8 P 146.2 9 223.6
= 97.4 H 151.4 * 241.8
B 100 X 156.7 # 250.3
K 103.5 Y 162.2 ‘ ‘ NONE
Encoder
Tone Deviation:
25kHz channel spacing 500 to 750Hz
20kHz channel spacing 400 to 600Hz
12.5kHz channel spacing 250 to 375Hz
Tone Distortion Less than 5.0%
Frequency Error Less than ±0.5%
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Decoder
Bandwidth Not greater than ±3.0%
Deviation Sensitivity Less than 6.0% of system deviation (for decode with full RF quieting)
Noise Immunity Less than 500ms dropout per minute at 10dB sinad
(CTCSS tone deviation 10% of system deviation. RF deviation 60% at
1000Hz).
False Decode Rate Less than 5 false decodes per minute (no carrier input)
Talkoff For no dropouts in one minute, interfering tone at 90% of system deviation
(CTCSS tone at 10% of system deviation).
Full quieting signal: 310Hz to 3000Hz
20dB sinad RF signal: 320Hz to 3000Hz
12dB sinad RF signal: 350Hz to 3000Hz
Response Time Less than 250ms (full quieting/tone >100Hz)
Less than 350ms (full quieting/tone <100Hz)
De-Response Time Less than 250ms
Reverse Tone Burst none
1.8.4.2 FFSK
1200 Baud : 1200 / 1800 Hz MPT1317 based
2400 Baud : 1200 / 2400 Hz MPT1317 based
1.8.4.3 Selcall
The following tone sets are supported as per tables below:
• ST-500: CCIR, EEA, ZVEI, DZVEI, EIA
• ST500/CML: ZVEI_3, DZVEI
• CML: CCIR, EEA, ZVEI
• SIGTEC: CCIR, CCIRH, EEA, ZVEI_1, XVEI_2, ZVEI_3, NATEL, EIA
• SEPAC: CCIR, EEA, ZVEI_1, ZVEI_2, ZVEI_3, EIA
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Selcall Tone Frequency Table
Tone CML ST500 SIGTEC SIGTEC SEPAC CML ST500 SIGTEC
CCIR CCIR CCIR CCIRH CCIR EEA EEA EEA
0 1981 1981 1981 1981 1981 1981 1981 1981
1 1124 1124 1124 1124 1124 1124 1124 1124
2 1197 1197 1197 1197 1197 1197 1197 1197
3 1275 1275 1275 1275 1275 1275 1275 1275
4 1358 1358 1358 1358 1358 1358 1358 1358
5 1446 1446 1446 1446 1446 1446 1446 1446
6 1540 1540 1540 1540 1540 1540 1540 1540
7 1640 1640 1640 1640 1640 1640 1640 1640
8 1747 1747 1747 1747 1747 1747 1747 1747
9 1860 1860 1860 1860 1860 1860 1860 1860
A 2400 1055 2110 2400 2400 1055 1055 2110
B 930 .... 2400 930 1055 930 .... 1055
C 2247 2400 1055 2247 2247 2247 2400 2400
D 991 .... 2247 991 991 991 .... 2247
E 2110 2110 930 2110 2110 2110 2110 930
F .... .... 991 1055 .... .... .... 991
Tone SEPAC CML ST500 SIGTEC SEPAC SIGTEC SEPAC SIGTEC
EEA ZVEI ZVEI ZVEI-1 ZVEI-1 ZVEI-2 ZVEI-2 ZVEI-3
0 1981 2400 2400 2400 2400 2400 2400 2200
1 1124 1060 1060 1060 1060 1060 1060 970
2 1197 1160 1160 1160 1160 1160 1160 1060
3 1275 1270 1270 1270 1270 1270 1270 1160
4 1358 1400 1400 1400 1400 1400 1400 1270
5 1446 1530 1446 1446 1446 1446 1446 1400
6 1540 1670 1670 1670 1670 1670 1670 1530
7 1640 1830 1830 1830 1830 1830 1830 1670
8 1747 2000 2000 2000 2000 2000 2000 1830
9 1860 2200 2200 2200 2200 2200 2200 2000
A 1055 2800 970 2600 2800 970 885 2400
B 970 810 .... 2800 970 885 741 885
C 2247 970 2800 741 885 741 2600 741
D 2400 886 .... 970 .... 2600 .... 2600
E 2110 2600 2600 810 2600 2800 970 2800
F .... .... .... 886 .... 600 .... 600
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Tone SEPAC ST500/CML ST500 SIGTEC SIGTEC SEPAC ST500
ZVEI-3 ZVEI-3 DZVEI DZVEI NATEL EIA EIA EIA
0 2200 2400 2200 2200 1633 600 600 600
1 970 1060 970 970 631 741 741 741
2 1060 1160 1060 1060 697 882 882 882
3 1160 1270 1160 1160 770 1023 1023 1023
4 1270 1400 1270 1270 852 1164 1164 1164
5 1400 1530 1400 1400 941 1305 1305 1305
6 1530 1670 1530 1530 1040 1446 1446 1446
7 1670 1830 1670 1670 1209 1587 1587 1587
8 1830 2000 1830 1830 1336 1728 1728 1728
9 2000 2200 2000 2000 1477 1869 1869 1869
A 885 885 2600 825 1805 459 2151 2151
B 741 .... .... .... 1995 2151 1091 ....
C 2600 810 886 2600 1300 2600 2400 2010
D .... .... 810 .... 1700 2010 .... ....
E 2400 970 2400 2400 2175 2433 459 459
F .... .... .... .... 2937 2292 .... ....
Selcall Tone Periods
The Selcall tone period :
4 preset lengths selectable : 20ms and 30 seconds in 1ms increments.
1.8.4.4 DTMF
DTMF Encode supported via keypad:
TONES 1209Hz 1336Hz 1477Hz
697Hz 1 2 3
770Hz 4 5 6
852Hz 7 8 9
941Hz * 0 #
Tone Period, programmable : 0 - 2550 mSec in 10mS steps
Inter-Tone Period, programmable : 0 - 2550 mSec in 10mS steps
Link Establishment Time, programmable : 0 - 10000 mSec in 10mS steps.
Tx Hang Time, programmable : 0 - 9999 mSec in 10mS steps.
Side-Tone in Loudspeaker : selectable via programmer
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1.8.4.5 DCS
Data rate 134 bits per second, frequency modulated
7.46ms/bit
171.6ms per codeword continuously repeating
Deviation 0.5kHz for 12.5kHz systems
1kHz for 25kHz systems
Codeword size 23 bits comprising:
8 bits - DCS code (3 octal digits 000-777)
3 bits - Fixed octal code 4
11 bits - CRC (error detection) code
Available Codes 104 codes from 512 theoretically possible codes – see below
Turn off code 200ms 134Hz tone at PTT release
DCS Codes can be Transmitted “Normal” or “Inverted” (programmable).
The radio can Receive DCS codes in either Transmitted “Normal” or “Inverted” or both (selectable via
programmer).
Valid DCS Codes
023 132 255 413 612
025 134 261 423 624
026 143 263 431 627
031 145 265 432 631
032 152 266 445 632
036 155 271 446 654
043 156 274 452 662
047 162 306 454 664
051 165 311 455 703
053 172 315 462 712
054 174 325 464 723
065 205 331 465 731
071 212 332 466 732
072 223 343 503 734
073 225 346 506 743
074 226 351 516 754
114 243 356 523
115 244 364 526
116 245 365 532
122 246 371 546
125 251 411 565
131 252 412 606
1.8.4.6 C4FM
Digital speech format in accordance with TIA/ EIA 102 requirements.
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1.8.5 Environmental
Note: Operation of the equipment is possible beyond the limits stated but is not guaranteed.
Operational Temperature
-30°C to +60°C
Storage Temperature
-40°C to +80°C
Vibration Specification
IEC 68-2-6 with additional frequency acceleration from 60 – 150 Hz
Cold
IEC 68-2-1 Test 5 hours at -10°C
Dry Heat
IEC 68-2-2 Test 5 hours at +55°C
Damp Heat Cycle
IEC 68-2-30 Test 2 cycles at +40°C
Product Sealing
Main Radio Unit: IEC529 rating IP54
Microphones: IEC529 rating IP54
Remote Control Head IEC529 rating IP54
MIL STD810
Low Pressure 500.4 Procedure II
High Temperature Storage 501.4 Procedure I
High Temperature Operation 501.4 Procedure II
Low Temperature Storage 502.4 Procedure I
Low Temperature Operation 502.4 Procedure II
Temperature Shock 503.4 Procedure I
Humidity 507.4 Figure 507.4-1
Sand and Dust 510.4 Procedure I – Blowing Dust
Random Vibration 514.5 Figure 514.5C-1
Transit Drop 516.5 Table 516.5-V1
Functional Shock of severity 25g
Acceleration, 6ms pulse duration,
500 shocks in 6 directions.
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2. SERVICE PHILOSOPHY
2.1 SERVICE CONCEPT
The SRM9000 series has been designed to provide low cost trunked, non-trunked analogue and digital
speech mobile transceivers, using common core electronics, software and interfacing. It is a requirement that
once the customer has purchased equipment, TMC Radio can follow this by providing an ongoing, high level
of customer support together with a competitive and professional servicing activity.
There are three levels of service available:
Level Activity Recommended Spares Recommended Test
Equipment
1 Replacement of complete
transceiver/antenna/fuses
Reprogramming
Antennas, Fuses
Ancillaries Multimeter P.C.
Radio software
Programmer
2 Replacement of PCB or
mechanical component
replacement, Cosmetic repair
Listed in Level 2 Spares
Schedule As above + service aids and
test equipment
3 Repair by PCB or mechanical
component replacement,
Cosmetic repair.
Repair of Radio PCB to
component level in CRU.
Listed in Level 2 Spares
Schedule
Radio PCB components
only available to CRU.
As above + service aids and
test equipment
2.2 WARRANTY
Initially, the normal 12-month warranty will apply to all radios and ancillaries.
2.2.1 Service Within and Out Of Warranty
The field Service Level for the SRM9000 mobile is LEVEL 2, PCB replacement.
LEVEL 2 service, PCB (only) and case part replacement, will be carried out in field repair workshops, or the
Central Repair Unit (CRU) if required.
LEVEL 3 Service (Radio PCB component level repair) will ONLY be carried out in the Central Repair Unit.
For this, the complete radio must be returned to the CRU.
A PCB replacement program may be offered by the CRU in some countries.
2.2.2 Ancillary Items
All ancillary items (except remote alphanumeric control head) are Level 1 service.
These items should be replaced if faulty; they are non-repairable, and non-returnable to the CRU.
2.3 SOFTWARE POLICY
Software provided by TMC Radio shall remain the Company's property, or that of its licensors and the
customer recognises the confidential nature of the rights owned by the Company.
The customer is granted a personal, non-exclusive, non-transferable limited right of use of such software in
machine-readable form in direct connection with the equipment for which it was supplied only.
In certain circumstances the customer may be required to enter into a separate licence agreement and pay a
licence fee, which will be negotiated at the time of the contract.
Page 2.2
TNM-M-E-0001 Issue 3
2 ~ SERVICE PHILOSOPHY
The customer undertakes not to disclose any part of the software to third parties without the Company's
written consent, nor to copy or modify any software. The Company may, at its discretion, carry out minor
modifications to software. Major modifications may be undertaken under a separate agreement, and will be
charged separately.
All software is covered by a warranty of 3 months from delivery, and within this warranty period the Company
will correct errors or defects, or at its option, arrange free-of-charge replacement against return of defective
material.
Other than in the clause above, the Company makes no representations or warranties, expressed or implied
such, by way of example, but not of limitation regarding merchantable quality or fitness for any particular
purpose, or that the software is error free, the Company does not accept liability with respect to any claims
for loss of profits or of contracts, or of any other loss of any kind whatsoever on account of use of software
and copies thereof.
Page 3.1
3 ~ TECHNICAL DESCRIPTION
TNM-M-E-0001 Issue 3
3. TECHNICAL DESCRIPTION
3.1 RECEIVER
Refer to Figure 3-1.
3.1.1 Front End Filters and RF Amplifier
The receiver input signal from the antenna passes through the antenna filter comprising L582, L584, L585
and associated tuning capacitors. With the mobile in receive mode, diodes D580, D540a and D541a in the
antenna switch are reverse biased allowing the receiver input signal to be coupled through to the front end
with minimal loss. The overall insertion loss of the antenna filter and switch is approximately 0.8dB. Front end
selectivity is provided by varactor-tuned bandpass filters at the input and output of the RF amplifier.
Front end tuning voltages are derived from the alignment data stored in the radio. The DSP processes these
data to optimise front end tuning relative to the programmed channel frequencies, which may be changed at
any time without re-aligning the radio.
To achieve the required varactor tuning range an arrangement of positive and negative bias power supplies
is used to provide a total bias across the varactors of up to 14.0VDC. A fixed 2.5V positive bias derived from
the 5.0V supply and voltage divider R425/426 is applied to the cathodes of the varactor diodes. The negative
bias supply originates at the DSP/FPGA as a PWM signal (FE TUNE) for the four front end tuning values,
TUNE 1 to 4, for the particular channel frequency selected. The PWM signal is dependent on channel
frequency and tuning. The PWM signal passes through level shifting transistors Q405, Q407, Q409 and
Q411 where it is converted to a high level negative voltage (-0.5 to -11.5V). The -12.0V rail of the level
translators is generated by U904E/F with D903 to D906 providing the required voltage multiplier effect.
The RF amplifier stage comprises a low noise transistor amplifier (Q400) that is compensated to maintain
good linearity across the required frequency bands and temperature range. This provides excellent
intermodulation and blocking performance across the full operating range. The gain of this stage is typically
17dB for both UHF and VHF versions.
3.1.2 First Mixer and IF Section
The output of the last front end bandpass filter is coupled into single balanced mixer T400/D413 which
converts the RF signal to an IF frequency of 45MHz. The local oscillator injection level is typically +8dBm at
T400 pin 1 with low side injection used for UHF and high side for VHF.
Following the mixer is IF amplifier Q401 that provides approximately 15dB of gain and in association with its
output circuitry, presents the required load conditions to the 4 pole 45MHz crystal filter Z401A/Z401B.
3.1.3 Quadrature Demodulator
Additional IF gain of approximately 30dB occurs at U401, which is a dedicated IF AGC amplifier/Quadrature
Demodulator. The AGC voltage for U401 is derived from the RSSI function of the DSP. The onset of AGC
operation occurs when RF input signal levels at the antenna exceed -90dBm.
Conversion of the 45MHz IF signal to I and Q baseband signals is carried out by the demodulator section of
U401. The 90MHz local oscillator signal is generated by VCO Q402 which is phase locked by the auxiliary
PLL output of U701 via feedback signal AUX LO2.
Page 3.2
TNM-M-E-0001 Issue 3
3 ~ TECHNICAL DESCRIPTION
Antenna
Switch
D580/540a/
541a
Bandpass
Filter RF Amp
Q400 Bandpass
Filter Mixer
T400 IF Amp
Q401
4-Pole
45 MHz
Filters
Z401A/B
Antenna
Filter
L582, L584
& L585
IQ
Demodulator
U401
TX/RX
Switch
D610/611
RX VCO
Q600
RX VCO
Switch
Q601
VCO
Buffer
Q604/605
Synthesiser
Buffer
Q607
90 MHz
LO
Q402
RX/TX AF
Switch
U801
ADC/DAC
CODEC
U800
Aux
AF O/P
Amp
U803
Spkr
Switch
Q810/811/
813
Speaker
Amp
U805
AF Amp
U803
to U701
CPP VCO
Control Volts
RX PSU To TX Buffer
SYNTH
AUX CP to U701
QI
AFC/Ref OSC/MOD
From FPGA/DSP
TX MOD1
To TX VCO
AUD OutSPKR ON
SPKR OUT 1
SPKR OUT 2
From FPGA U300
Tune 1, 2, 3 & 4
To TX PA
Audio in from
Mic Audio
or
Option Audio
AGC from
FPGA
U300
Figure 3-1 VHF/UHF Receiver Block Diagram
Page 3.3
3 ~ TECHNICAL DESCRIPTION
TNM-M-E-0001 Issue 3
3.1.4 Receiver Audio Processing
All receiver audio processing and filtering functions are performed by the CODEC U800 under the control of
the DSP. The receiver I and Q analog baseband signals are converted to digital signals by the CODEC ADC
before being applied to a series of digital filters which provide the final stage of adjacent channel filtering,
high pass and low pass filtering and mute noise processing for narrow and wideband operation. The
processed signals are then converted to analog audio signals by the CODEC DAC and are applied to
conventional audio amplifiers U803A/B and the speaker amplifier U805.
There are two speaker options available. A half bridged configuration using a speaker across balanced
output SPKR OUT1 and 2, which provides an audio, output level of up to 4 watts into 4 ohms. The other
option is a full bridge configuration using a high power speaker across SPKR OUT1 and 2 and providing an
audio output level of up to 10 watts into 8 ohms. The carrier and signalling mute functions are performed by
Q810/811/813 under DSP control. De-emphasis to the audio PA U805 is performed by R861 and capacitors
C866 to C871. Flat audio is provided to S1-6 via amplifier U803A.
Page 3.4
TNM-M-E-0001 Issue 3
3 ~ TECHNICAL DESCRIPTION
3.2 TRANSMITTER
Refer to Figure 3-2.
3.2.1 Drivers and PA Stages
The RF output level from the VCO buffer Q604 is typically +5dBm (UHF) and +8dBm (VHF). TX buffer Q606
increases this level by approximately 3dB (UHF) and 11dB (VHF) and also provides additional VCO isolation.
The following section of the TX buffer Q612 is controlled by the transmitter power control loop and Q609.
Q609 is normally saturated in transmit mode so there is no minimum gain control applied to this stage. The
gain of Q612 is typically 10dB (UHF) and 15dB (VHF) but the output level is reduced by input and output
resistive attenuators to limit the PA driver input level to typically +20dBm. The gain of PA driver Q571 is
controlled by the power control loop to ensure that transmitter output power remains within defined limits. The
PA driver output level is typically +16dBm. PA module U500 utilises three stages (UHF) and two stages
(VHF) to achieve the required final RF output power level of +44dBm (25 watts). Power output settings are
derived from alignment data stored in flash memory during the initial factory alignment. The DSP processes
this data to optimise the power output level relative to the programmed channel frequencies.
3.2.2 Power Control
Output power is stabilised by a power control feedback loop. L580, R580, a printed circuit transmission line,
D510 and associated components comprise the power detector, and U520A/B and associated components
providing the power setting and control sections. Forward and reverse power is sampled by the power
detector and applied as a DC voltage to the inverting input of comparator U520A. The TX PWR SET voltage
is a DC voltage proportional to the programmed TX power setting and is applied to the non-inverting input of
the comparator. PA module output level changes due to supply voltage, load or temperature variations are
detected and applied to the comparator which proportionally adjusts the PA module bias supply and the PA
driver (Q571) supply, and therefore the PA drive level. High temperature protection is provided by thermistor
R552 that progressively reduces the power level if the PA module temperature becomes excessive.
3.2.3 Antenna Changeover and Harmonic Filter
The antenna changeover circuit consisting of pin diodes D580/D540a/D541a, is switched by
Q541/Q542/Q543 and associated circuitry allowing the transmitter output to be coupled to the antenna while
providing isolation for the receiver input. With the transmitter switched on, the diodes are forward biased
allowing power to be coupled through to the antenna and isolating the receiver by grounding its input at C558.
The short circuit at the receiver input is transformed to an effective open circuit at D580 by L583, which
minimises transmitter loading. With the transmitter switched off the diodes are reverse biased allowing the
receiver input signal to reach the receiver front end with minimal loading and loss. The harmonic rejection low
pass filter comprises L582/L584/L585 and associated capacitors.
3.2.4 Transmitter Audio Processing
Microphone audio input signals of 40mV RMS with a source impedance of 470 ohms are provided at the
microphone input (AUDIO IN1) by an external microphone unit comprising an electret microphone insert and
a preamplifier with a gain of 18dB. U801 is a control gate for the microphone audio signals.
OPTION AUDIO1 is the external audio options and data input, which is controlled by gate U801A.
U801C provides CODEC input switching which selects either the receiver I signal or transmitter audio/data
signals depending on the TX/RX mode. All pre-emphasis, filtering, compression and limiting processes for
narrow and wideband operation are carried out in the CODEC (U800) under the control of the DSP. The
processed transmitter audio/data from the CODEC output at VOUTR is applied to the VCO as a modulation
signal with a level of approximately 200mV P/P.
Page 3.5
3 ~ TECHNICAL DESCRIPTION
TNM-M-E-0001 Issue 3
Synthesiser
Buffer
Q607
TX VCO
Switch
Q603
TX
Buffer/Amp
Q606/609/
612
TX PA
Driver
Q571
TX PA
U500
Antenna
Switch
D580/540a/
541a
TX VCO
Q602
Comparator
U520
Power
control
detector
D510
Antenna
Filter
L582/584/
585
RX / TX
Switch
D610/611
ADC/DAC
CODEC
U800
Switch
U810A
RX / TX
Switch
U801C
VCO
Buffer
Q604/605
TX power set
from FPGA
TX options Audio + Data
TX Mic audio
From FPGA/DSP
VCO Control Volts
CPP
TX MOD1
Q
SYNTH
to U701
I
To RX Mixer
LO1 Rx
Figure 3-2 VHF/UHF Transmitter Block Diagram
Page 3.6
TNM-M-E-0001 Issue 3
3 ~ TECHNICAL DESCRIPTION
FREQUENCY SYNTHESISER
3.2.5 General
The SRM9000 frequency synthesiser consists of individual transmitter and receiver (local oscillator) voltage
controlled oscillators, loop filter, varactor negative bias generator, reference oscillator and an integrated, dual
phase locked loop device U702.
3.2.6 PLL
The PLL device contains two prescalers, programmable dividers and phase comparators to provide a main
and auxiliary PLL. The main PLL of U702 controls the frequency of the TX/RX VCOs via Control Voltage
outputs at pins 2 and 3 and VCO Feedback to pin 6. The auxiliary PLL is used to control the receiver 90MHz
second local oscillator via the Control Voltage output at pin 17 and VCO Feedback to pin 15. The PLL
operation involves the division of the 14.4MHz reference oscillator frequency by divider U710 and the internal
divider of U702, down to a lower frequency that corresponds to a sub-multiple of the radio channel spacing
ie. 6.25kHz for 12.5/25kHz channel spacing, 5kHz for 10/20kHz channel spacing or 7.5kHz if required. The
VCO frequency is sampled and divided down to the same frequency after which it is phase compared to the
reference. Any error produces an offset to the Control Voltage output that is used to correct the VCO
frequency. A valid lock detect output is derived from pin 20 and is sampled by the FPGA during transmit. If an
unlocked signal is detected the radio will switch back to receive mode.
3.2.7 VCO
The transmitter and receiver VCOs use low noise JFET transistors (Q600 RX, Q602 TX) and inductors L602
(RX), L608 (TX) to generate the signals for the required band coverage. Electronic tuning is provided by
varactor diodes D600 to D608 with their control voltages derived from the Loop Filter, PLL and Negative Bias
Generator. VCO selection and timing is controlled by the DSP via the RX and TX power supplies and applied
through switches Q601 (RX) and Q603 (TX). VCO buffer Q604/605 isolates the VCO from load variations
and active power supply filter Q615 minimises supply related noise. A PLL feedback signal is sampled from
the VCO buffer output via buffer Q607.
3.2.8 Negative Bias Generator and Loop Filter
A positive and negative varactor bias supply similar to the front-end varactor arrangement has been used to
achieve the required broadband tuning range of the VCOs. PLL device U702 is programmed to deliver a
fixed nominal +2.5V output from phase detector/charge pump CPPF or CPP (selection depends on radio
setup) regardless of the channel frequency selected. This voltage is filtered to remove synthesiser noise and
reference products by loop filter C676/678/681 and R653/654/655. The resulting low noise voltage is applied
to the cathode side of the VCO varactor tuning diodes as a positive bias voltage. The negative bias supply
originates as a positive DC voltage (0.1V to 3.0V) at the DAC output of U702 (DOUT) with a level relative to
the programmed state of the radio (eg. channel frequency, TX/RX state). The voltage is converted to a high
level negative supply by VCO Varicap Negative Supply Q700 to Q703. The -17V rail of this supply is
generated by U904E/F with D903 to D906 providing the voltage multiplying effect needed to achieve -17V.
The output of the negative supply is applied directly to the VCO varactor anodes as the negative tuning
voltage VCAP BIAS.
3.2.9 Phase Modulator
The modulation path for audio, data and higher frequency CTCSS signals is via varactor D609 and its
associated components in the TX VCO. The reference input to the PLL (FXTAL) provides the low frequency
modulation path in conjunction with phase modulator Q714 to Q716. U711A is a low pass filter that provides
6dB per octave attenuation to frequencies above approximately 180Hz. Modulation balance adjustment is
carried out using a CODEC generated 100Hz square wave applied to TX MOD. A DAC output from the
Alignment Tool is applied to buffer U711B and ramp generator Q711 to Q713 via the MOD BAL line to adjust
the low frequency modulation level.
Page 3.7
3 ~ TECHNICAL DESCRIPTION
TNM-M-E-0001 Issue 3
3.2.10 Reference Oscillator
TCXO U700 determines the overall frequency stability and frequency setting of the radio. The frequency
setting is achieved by adjusting its ADJ voltage with the Alignment Tool. In addition, the ADJ input is used in
a frequency control loop with the receiver I and Q signals to provide receiver AFC. U700 operates at
14.4MHz and is specified at ±2.0ppm frequency stability over the temperature range -30° to +75°C.
Page 3.8
TNM-M-E-0001 Issue 3
3 ~ TECHNICAL DESCRIPTION
Phase Modulator
Q714/715/716
Divider
U710
÷ 36 (UHF)
÷ 72 (VHF)
Buffer
Q710
Ref OSC
U700
Synth
Buffer
Q607
VCO
Buffer
Q604/605
Low Pass
Filter
U711/A
VCO
Neg Bias
supply
Q700/701/
702/703
90MHz
LO
Q402
Synthesiser
U701
Loop Filter
C676/
678/
681 RX / TX
VCO
Q600/602
RX/TX
Switch
D601/611
ADC/DAC
CODEC
U800
RX / TX
AF Switch
U801C
From FPGA/DSP
VCAP BIAS
To TX Buffer
Audin 1 Mic audio
Q
AFC
To Mod 1
To IQ
demodulator
U401
LO2 AUX LO2
AUX CP
CPP
CPPF
DOUT
To RX Mixer
LO1 Rx
SYNTH
Switch
U801A
Option audio and data input
TX Mod 1
Ramp Gen
Q711/712/713
Mod Bal Buffer
U711/B
FXTAL
Figure 3-3 VHF/UHF Synthesiser, Block Diagram
Page 3.9
3 ~ TECHNICAL DESCRIPTION
TNM-M-E-0001 Issue 3
3.3 CONTROL
Refer to Figure 3-4.
3.3.1 DSP and FPGA
The SRM9000 transceiver operates under the control of a DSP (U201) and FPGA (U300) combination that
together with a number of other dedicated devices perform all the operational and processing functions
required by the radio. The FPGA is configured by the DSP under software control to provide the following
functions:
• Channel set-up of all operating frequencies
• Modulation processing and filtering
• De-modulation processing and filtering
• TX power output reference
• Receiver front end tuning
• Serial communications with alignment tool, microphone and control head
• Modem functionality for data modulation
• All signalling / CTCSS generation and decoding
• Crystal Oscillator control
• Receiver muting control
• TX / RX switching
• PLL detect
3.3.2 DSP Clock Oscillator
The DSP is clocked by a 15.360MHz oscillator that consists of crystal X200 and an internal DSP oscillator.
Q200 forms a crystal switching circuit with C205 which, when activated by a command from the FPGA,
steers the oscillator away from potential interfering frequencies.
3.4 MEMORY
Memory consists of the internal DSP memory and an external 8MB non-volatile Flash Memory U202. When
power is off, program and data are retained in Flash Memory. At power-on, a boot program downloads the
DSP’s program from Flash Memory to its internal RAM for faster program execution and access to data.
Page 3.10
TNM-M-E-0001 Issue 3
3 ~ TECHNICAL DESCRIPTION
DSP
U201
Synthesiser
U702
FPGA
U300
Reset
U200
Clock
Q200
Flash
Memory
U202
ADC/DAC
CODEC
U800
Serial port
Serial port
TX Data
RX Data
MOVEX
AGC
TX Power Set
A Tone
}F/E Tune 1 - 4
Figure 3-4 VHF/UHF Control Block Diagram
Page 3.11
3 ~ TECHNICAL DESCRIPTION
TNM-M-E-0001 Issue 3
3.5 POWER SUPPLIES
3.5.1 Power On Function
The unregulated 13.8V DC input (13V8_UNSW_F) is routed directly to all high current devices and is then
switched via FET Q900 to provide BAT_SW supply for all other circuits. The output from Q900 feeds four,
low drop out series regulators and associated switched and auxiliary supplies that along with a negative
voltage generator, provides all the switched power requirements of the transceiver. Radio ON/OFF function is
achieved through Q902, 908 and 909. A low voltage pulse from the control unit or microphone handset PWR
ON or PWR OFF momentarily turns on Q900, which supplies input voltage to the four regulators. Q909 is
then kept switched on by the PWR OFF line that is set to high by the DSP and FPGA and so maintains the
BAT_SW supply.
PWR OFF operation requires the PWR ON/ OFF button of the control unit to be held down for more than 2
seconds. This is sensed by the FPGA via the PWR SENSE line and so turns the radio off by placing a low
voltage to Q909 base. Supply lines are held on for a short period at switch off while the DSP stores critical
data.
3.5.2 Power Supplies
The following is a list of the SRM9000 power supplies and some of the devices and circuits they supply.
3.5.2.1 +8V Regulator U900
Regulated +8.0V supply (8V0 and +8V)
• TX buffer Q571
• VCOs and VCO buffers via active filter Q615
• RX second local oscillator via Q403
Regulated +8.0V switched supply (RX PSU)
• RX front end
• IF Amplifier
• Various switching functions
3.5.2.2 +5V Regulator U901
Regulated +5.0V supply (5V0 and +5V)
• RX front end varactor positive bias
• Synth. buffer Q607
• VCO varactor negative supply Q700 to Q703
• TCXO U700
• RX audio amplifiers U803A/B
• RX mute switch Q810/813
• FE TUNE level translators, Q404/411
Regulated +5.0V switched supply (TX PSU and TX PSU+)
• TX power control U520
• TX buffer Q606
• Various switching functions
Page 3.12
TNM-M-E-0001 Issue 3
3 ~ TECHNICAL DESCRIPTION
3.5.2.3 +3.3V Regulator U912
Regulated +3.3V supply (3V3)
• Digital supply for CODEC U800
• FPGA U300
Regulated +3.3V supply (3Q3)
• I Q demodulator U401
Regulated +3.3V supply (3C3)
• Analog supply for CODEC U800
Regulated +3.3V supply (3P3)
• PLL U702
• TCXO divider U710
Unregulated 13.8V (13V8_UNSW_F)
• TX PA module U500
• Antenna changeover switch Q541/542/543
• RX mute switch Q811
• RX speaker amplifier U805
3.5.2.4 +2.5V Regulator U903
• DSP core U201
3.5.2.5 Negative Power Supply U904E/F
Provides -17.0V output (-17V0)
• Negative rail for VCO Varicap Negative Supply Q700, 701, 702 and Q703
-12.0V Output (-12V0)
• Negative rail for FE TUNE level translator Q404-Q411.
Page 4.1
4 ~ ALIGNMENT
TNM-M-E-0001 Issue 3
4. ALIGNMENT (LEVEL 3 SERVICE ONLY)
This procedure is applicable to all versions of SRM9000 mobile transceivers.
If the radio contains customer configuration data that must be retained, you must first use the SRM9000
Configuration Programmer (FPP) software to read the radio and save the data on an FPP file before
commencing with the alignment procedure.
When the Alignment is completed, use the SRM9000 Field Personality Programmer (FPP) software to
retrieve this stored data from the FPP file and write it back to the radio.
It is preferred that the radio remain installed in its aluminium extruded case throughout this alignment
procedure. If the radio is to be aligned when removed from the case, a temporary heat sink must be fitted
under the Transmitter PA module and the receiver output must be kept below 100mW.
4.1 TEST EQUIPMENT
1. Radio transceiver test set CMT, 52/82 or similar.
2. Variable DC power supply 10.8V to 16.2V at 10 amps
3. Oscilloscope 20 MHz bandwidth minimum
4. SRM9000 Programming & Alignment Breakout
Box As detailed in Figure 4-1
5. SRM9000 Speaker O/P Breakout Box As detailed in Figure 4-2
6. Personal Computer 486 DX 66 or better.
Operating system Windows 95 or later.
Minimum RAM - 16MB.
5MB free hard disk space.
Floppy drive - 1.44MB.
Mouse and serial port required
7. SRM9000 Alignment Tool Computer Software file
8. SRM9000 Configuration Programmer (FPP) Computer Software file
Caution
Preparing the radio for alignment will erase from the radio all customer PMR and Trunking
configuration data (channel, signalling information etc). The only data retained by the Alignment
Tool is the factory alignment data for the radio (DAC settings for TX power, front-end tuning etc).
Using the Alignment Tool will allow changes to the original factory alignment and will invalidate
all warranties and guarantees unless performed by an authorised level 3 service centre.
Page 4.2
TNM-M-E-0001 Issue 3
4 ~ ALIGNMENT
Figure 4-1 SRM9000 Programming & Alignment Breakout Box
Figure 4-2 SRM9000 Speaker Output Breakout Box
T1
600E 1:1
Line Matching
Transformer
To
Noise & Distortion Mete
r
&
CRO
To
SRM9000 P2
Pins 6 & 13
9000_49/3
R
R = Audio Power Load (set as appropriate)
or
Resistor 4E 4W for 1/2 Bridge Speaker option
Resistor 8E 12W for full Bridge Speaker option
Black
Red
Yellow
Blue
Brown
Orange
Green(4)
White (8)
(Not Used)
+470E White
Green
Mic Audio in
Mic Ground
Ground
Handset AF Output
13.8V Switched
On/Off
Rx Data
Tx Data
8
4
7
6
5
3
2
1
RJ45
PRM80
Programming Cable
P/N 9525-001-00016
BNC (F)
Connector
22uF to 47uF
Tant. or Elect
DB25
Access and modify
cable as shown
9000_49/2
25-9 Way
Adaptor
PC To
SRM900
0
S1
AF
G
enerator
Page 4.3
4 ~ ALIGNMENT
TNM-M-E-0001 Issue 3
4.2 TEST SET-UP
Figure 4-3 Test Set-up
1. Connect the radio to the test equipment as shown in Figure 4-3.
2. Switch on the DC Power Supply.
7
6
5
4
3
2
1
8
15
14
13
12
11
10
9
SRM9000
P2
(DB15M)
PC
SRM9000
Programming
and
Alignment
Breakout
Box
S5
Antenna Skt
S1
RJ45
AF
Generator
13.8V DC
Power Supply
CRO
9000_49
+-
Radio
Transceiver
Test
Set
Noise &
Distortion
Meter
SRM9000
Speaker O/P
Breakout
Box
Coax
(<200 mm)
Page 4.4
TNM-M-E-0001 Issue 3
4 ~ ALIGNMENT
4.2.1 COMMS Set up
1. Copy the SRM9000 Alignment Tool Computer Software
file to the PC hard drive and run the program
The Alignment Tool Opening Menu is displayed.
2. Go to the Options menu and choose Comms Setup.
3. The Comms Setup dialogue box is displayed.
Select the Comms Port setting appropriate to the
configuration of your PC and choose 9OK.
(Usually COM1)
Page 4.5
4 ~ ALIGNMENT
TNM-M-E-0001 Issue 3
4.2.2 Radio Preparation
Radio parameters are to be aligned sequentially as detailed in this procedure.
1. At the Opening Menu, select the Align Menu
and choose Prepare/Read Radio.
2. The WARNING is displayed.
Choose No if you want to save the
configuration and use the FPP software to
read and save the data to a file.
Choose Yes if you want to proceed and go to
step 3.
3. The radio alignment data is read (indicated by
percentage bar) and stored.
The test alignment data is downloaded into
the radio.
Note: In test alignment mode the radio is configured only for 12.5 kHz channel spacing, therefore all
alignment is carried out at 12.5 kHz levels. When the radio is configured with the FPP for other
channel spacings, the deviation related levels are calculated on a per channel basis by the radio
software.
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TNM-M-E-0001 Issue 3
4 ~ ALIGNMENT
4.2.3 Alignment Procedure
Radio alignment must be done in the sequence detailed in the following paragraphs. This alignment
assumes that the radio is functioning normally.
4.2.3.1 VCO DAC Alignment
1. Select the VCO DAC page.
2. Select Auto Align. The Synth DAC Rx slider will automatically adjust its value for each receiver
alignment frequency to set the VCO loop filter value between 140 and 150.
3. Select PTT and then select Auto Align. The Synth DAC Tx slider will automatically adjust its value for
each transmitter alignment frequency to set the VCO loop filter value between 140 and 150.
Page 4.7
4 ~ ALIGNMENT
TNM-M-E-0001 Issue 3
4.2.3.2 TCXO (Radio Netting Adjustment)
1. Select the Mute/TCXO page.
2. Select PTT.
3. Adjust the TCXO slider to ensure that the transmit frequency error is within normal tolerance for the
selected channel (to be measured on the RF Test Set frequency counter).
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TNM-M-E-0001 Issue 3
4 ~ ALIGNMENT
4.2.3.3 RX Front End
1. Select the Rx Front End Page
2. Ensure that the TCX0 Alignment has been done before proceeding with this section.
3. Select Open Mute.
4. Set the Volume slider to 15.
Speaker audio should now be visible on the CRO, if required readjust the Volume slider to a suitable
level.
5. Select Channel 0
6. Set the Signal Generator to the Channel 0 carrier frequency, with a 1000Hz modulation signal, a
deviation of ±1.5 kHz and a RF level of -90dBm.
The RSSI barchart display should now be (typically) well above a reading of 20 - if so, jump to step 9.
7. If the RSSI is not visible or is very low, Manual Tuning may be required. To do this, adjust the four Filter
sliders (1-4) in combination for the maximum RSSI reading or for the best sinad reading. Proceed to
step 9 when an RSSI of better than 20 is achieved.
Note: For optimum results, the sliders should be adjusted to be approximately in line.
8. Select Auto Align.
The front end will be tuned automatically.
9. Verify that the receiver sensitivity is better than -117.5dBm for 12dB sinad.
(Sensitivity is typically -120dBm).
10
. Repeat Steps 6 to 10 for the remaining 3 Channels (1, 2, & 3).
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4 ~ ALIGNMENT
TNM-M-E-0001 Issue 3
4.2.3.4 Mute Adjustment
1. Select the Mute/TCXO page and select Open Mute..
2. Set the RF signal generator to the receiver alignment frequency, and adjust the RF level such that the
desired mute opening sinad (typically 10dB sinad) is achieved.
3. Select Close Mute and remove the RF input from the radio.
4. Set the Squelch Open and Squelch Close sliders to the fully left position. This ensures the receiver
will be muted.
5. Set the Squelch Close slider to the fully right position.
6. Reconnect the RF input to the radio.
7. Adjust the Squelch Open slider to the right until the mute opens.
8. Reduce the Signal Generator output level by approximately 2dB (or by an amount equal to the desired
mute hysteresis level).
9. Adjust the Squelch Close slider to the left until the mute closes.
10. The mute should now open and closes at the desired RF levels.
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TNM-M-E-0001 Issue 3
4 ~ ALIGNMENT
4.2.3.5 RSSI
1. Select the RSSI Cal page.
2. Set the Signal Generator for a RF output level of -90dBm at the specified frequency.
3. Activate the RSSI button.
The receiver RSSI threshold setting is calibrated.
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4 ~ ALIGNMENT
TNM-M-E-0001 Issue 3
4.2.3.6 TX Power
1. Select Tx Power/Mod page.
2. Select Channel 0.
3. Select the 25W-power level.
4. Press the PTT button.
5. Adjust the Tx Final Value slider for a power output of 25W.
The supply current shall be less than 7.5A.
6. Select the 5W-power level.
7. Adjust the Tx Final Value slider for a power output of 5W.
8. Select the 1W power level.
9. Adjust the Tx Final Value slider for a power output of 1W.
10. Release the PTT button.
11. Repeat steps 2 to 10 inclusive for the remaining 3 Channels (1, 2, & 3).
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TNM-M-E-0001 Issue 3
4 ~ ALIGNMENT
4.2.3.7 Modulation
1. Select Tx Power/Mod page.
2. Select Channel 0.
3. Select the 1W power level.
4. Set the microphone input signal from the Audio Generator to 1000Hz at 400 mV RMS.
5. Adjust the VCO Modulation Limit slider for a deviation of ±2.05kHz
6. Reduce the microphone input level to 40mV RMS and check that the deviation is within the range
±1.25 kHz to ±1.75 kHz.
7. Repeat steps 2 to 7 inclusive for the remaining 3 Channels (1, 2, & 3).
8. Remove the microphone audio input signal
9. Select the Generate Square Wave function.
10. Select PTT and, while viewing the de-modulated signal on the transceiver test set oscilloscope, adjust
the Modulation Balance slider for the best square wave symmetry.
11. Repeat steps 8 to 11 inclusive for the remaining 3 Channels (1, 2, & 3).
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4 ~ ALIGNMENT
TNM-M-E-0001 Issue 3
4.2.3.8 Programming
When all channels have been aligned the radio is programmed with the new alignment data:
1. Select Align and choose Write Alignment.
2. A warning message is displayed.
3. Choose Yes.
New alignment data is written to the radio.
4.2.3.9 Customers Radio Configuration Data
If the Customers Radio Configuration Data was stored in an FPP file, use the SRM9000 Configuration
Programmer to write this data to the radio.
Page
5.1
5.1~REPLACEABLE PARTS
TNM-M-E-0001 Issue 2
5. REPLACEABLE PARTS
1
2
9
4
7
3
456
8
10
9000_51
Figure 5-1 Replaceable Parts
5.1 COMMON PARTS
Ident Description Quantity per
Assembly Part Number
2 Case 1 3513-901-70071
3 End Cap, Rear 1 3513-903-91082
4 Screw End Cap 12 3513 993 85009
5 Screw Tray Retention M3 x 16 3 3513 993 57117
6 Screw Tray Retention M3 x 12 2 3513 993 57116
7 Label Transceiver Top 1 6102 303 00051
8 End Cap, Front 1 3513-903-91072
9 Label Front End Cap 1 6102 303 00041
10 Inner Tray 1 3513 901 70082
DC power installation kit 1 MA-DCPOWER
TX PA Shield cover 1 3502 310 63223
RJ45 Connector 1 3513 993 05529
DB15 Connector 1 3513 993 02063
Antenna BNC connector 1 3513 505 05991
Audio PA Module U805 1 3513 999 52036
Voltage Regulator U900, U901, U912 1 3513 999 42084
Voltage Regulator U903 1 6102 822 00011-0
Temperature Controlled Crystal Oscillator U700 1 3513 999 99200
Transient Suppressor Diode D900 1 3513 999 42083
Transmit Receive Switch Q541 1 3513-999-00006
ON/OFF FET Q7, Q900 1 3513 999 05046
Page 5.2
TNM-M-E-0001 Issue 3
5.2~BAND SPECIFIC PARTS
5.2 BAND-SPECIFIC PARTS
Ident Description Quantity per
Assembly Part Number
Tx PA Module U500 (E0 Band) 1 6102 861 00111
Tx PA Module U500 (AC Band) 1 6102 861 00011
Tx PA Module U500 (TK Band) 1 6102 861 00031
Tx PA Module U500 (R1 & R2 Band) 1 6102 861 00021
Tx PA Module U500 (UW & WR Band) 1 6102 861 00041
Tx PA Module U500 (K1 Band) 1 6102 861 00121
Tx PA Module U500 (KM Band) 1 6102 861 00131