Codan Radio Communications UT-4E850 MT-4E 800 MHz Transmitter User Manual Manual revision 3
Codan Radio Communications MT-4E 800 MHz Transmitter Manual revision 3
Manual revision 3
© 2007 Daniels Electronics Ltd. All rights reserved. No part of this
publication may be reproduced, stored in a retrieval system or transmitted
in any form or by any means, electronic, mechanical, photocopying,
recording or otherwise, without the prior written consent of Daniels
Electronics Ltd.
The stylized “Daniels Electronics Ltd.” and “DE” logo are registered
Canadian and US trademarks of Daniels Electronics Ltd.
The stylized “Daniels Electronics Ltd.” and “DE” logo are trademarks of
Daniels Electronics Ltd.
Document Number:
Revision:
Date:
Daniels Electronics Ltd.
Victoria, BC
PRINTED IN CANADA
Covers Models:
UR-4E420-00-000 UT-4E450-00-800
UR-4E420-A0-000 UT-4E500-00-800
UR-4E460-00-000 UT-4E850-00-300
UR-4E460-A0-000 VR-4E150-00-000
UR-4E500-00-000 VR-4E150-A0-000
UR-4E800-A0-000 VT-4E150-00-800
UR-4E850-A0-000
MT-4E VHF & UHF
RECEIVER & TRANSMITTER
INSTRUCTION MANUAL
136-174 MHz / 406-470 MHz / 470-520 MHz /
799-869 MHz
IM08-MT-4E-TXRX
Project 1106
July 2008
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
ii
This document has been produced, veried and controlled in
accordance with Daniels Electronics’ Quality Management System
requirements. Please report any errors or problems to Daniels
Electronics’ Customer Service Department.
DOCUMENT CONTROL
The user’s authority to operate this equipment could be revoked through any changes or
modications not expressly approved by Daniels Electronics Ltd.
The AMBE+2™ voice coding Technology embodied in this product is protected by intellectual
property rights including patent rights, copyrights and trade secrets of Digital Voice Systems,
Inc. This voice coding Technology is licensed solely for use within this Communications
Equipment. The user of this Technology is explicitly prohibited from attempting to extract,
remove, decompile, reverse engineer, or disassemble the Object Code, or in any other
way convert the Object Code into a human-readable form. U.S. Patent Nos. #5,870,405,
#5,826,222, #5,754,974, #5,701,390, #5,715,365, #5,649,050, #5,630,011, #5,581,656,
#5,517,511, #5,491,772, #5,247,579, #5,226,084 and #5,195,166.
The design of this equipment is subject to change due to continuous development. This
equipment may incorporate minor changes in detail from the information contained in this
manual.
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules and ICES 03. These limits are designed
to provide reasonable protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver
is connected.
- Consult the dealer or an experienced radio / TV technician for help.
Operation is subject to the following two conditions: (1) this device may not cause
interference, and (2) this device must accept any interference, including interference that
may cause undesired operation of the device.
NOTE
Daniels Electronics Ltd. utilizes a three-level revision system. This
system enables Daniels to identify the signicance of a revision.
Each element of the revision number signies the scope of change as
described in the diagram below.
DOCUMENT REVISION
DEFINITION
Major Revisions: The result of a major
change to product function, process or
requirements.
Minor Revisions: The result of a
minor change to product, process or
requirements.
Editorial Revisions: The result of typing
corrections or changes in formatting,
grammar or wording.
1-0-0
Three-level revision numbers start at 1-0-0 for the rst release. The
appropriate element of the revision number is incremented by 1 for each
subsequent revision, causing any digits to the right to be reset to 0.
For example:
If the current revision = 2-1-1 Then the next major revision = 3-0-0
If the current revision = 4-3-1 Then the next minor revision = 4-4-0
If the current revision = 3-2-2 Then the next editorial revision = 3-2-3
The complete revision history is provided at the back of the document.
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
iii
RF Exposure Warning
Exposure to radio frequency (RF) energy has been identied as a potential environmental factor that must be
considered before a radio transmitter can be authorized or licensed. The FCC and IC have therefore developed
maximum permissible exposure (MPE) limits for eld strength and power density, listed in FCC 47 CFR 1.1310
and IC RSS-102 Issue 2 Sect 4. The FCC has furthermore determined that determination of compliance with
these exposure limits, and preparation of an Environmental Assessment (EA) if the limits are exceeded, is
necessary only for facilities, operations and transmitters that fall into certain risk categories, listed in FCC 47
CFR 1.1307 (b), Table 1. All other facilities, operations and transmitters are categorically excluded from making
such studies or preparing an EA, except as indicated in FCC 47 CFR 1.1307 (c) and (d).
Revised FCC OET Bulletin 65 (Edition 97-01) and IC RSS-102 Issue 2 provide assistance in determining
whether a proposed or existing transmitting facility, operation or device complies with RF exposure limits. In
accordance with OET Bulletin 65, FCC 47 CFR 1.1307 (b) and RSS-102 Issue Sect 2.5, this Daniels Electronics
Ltd. transmitter is categorically excluded from routine evaluation or preparing an EA for RF emissions and this
exclusion is sufcient basis for assuming compliance with FCC/IC MPE limits. This exclusion is subject to the
limits specied in FCC 47 CFR 1.1307 (b), 1.1310 and IC RSS-102 Issue 2 Sect 4. Daniels Electronics Ltd. has
no reason to believe that this excluded transmitter encompasses exceptional characteristics that could cause
non-compliance.
Notes:
• The FCC and IC’s exposure guidelines constitute exposure limits, not emission limits. They are relevant
to locations that are accessible to workers or members of the public. Such access can be restricted or
controlled by appropriate means (i.e., fences, warning signs, etc.).
• The FCC and IC’s limits apply cumulatively to all sources of RF emissions affecting a given site. Sites
exceeding these limits are subject to an EA and must provide test reports indicating compliance.
RF Safety Guidelines and Information
Base and Repeater radio transmitters are designed to generate and radiate RF energy by means of an external
antenna, typically mounted at a signicant height above ground to provide adequate signal coverage. To
reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the
equivalent isotropically radiated power (EIRP) is not more than that permitted for successful communication.
The following antenna installation guidelines are extracted from Appendix A from OET Bulletin 65 and must be
adhered to in order to ensure RF exposure compliance:
Non-building-mounted Antennas:
Height above ground level to lowest point of antenna ≥ 10 m or
Power ≤ 1000 W ERP (1640 W EIRP)
Building-mounted Antennas:
Power ≤ 1000 W ERP (1640 W EIRP)
The following RF Safety Guidelines should be observed when working in or around transmitter sites:
• Do not work on or around any transmitting antenna while RF power is applied.
• Before working on an antenna, disable the appropriate transmitter and ensure a “DO NOT USE” or
similar sign is placed on or near the PTT or key-up control.
• Assume all antennas are active unless specically indicated otherwise.
• Never operate a transmitter with the cover removed.
• Ensure all personnel entering a transmitter site have electromagnetic energy awareness training.
For more information on RF energy exposure and compliance, please refer to the following:
1. FCC Code of Regulations; 47 CFR 1.1307 and 1.1310.
2. FCC OET Bulletin 65, Edition 97-01, “Evaluating Compliance with FCC Guidelines for
Human Exposure to Radiofrequency Electromagnetic Fields.”
3. http://www.fcc.gov/oet/rfsafety/.
4. IC RSS-102 Issue 2, “Radio Frequency Exposure Compliance of Radio Communication Apparatus.”
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
iv This Page Intentionally Left Blank
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
v
Contents
General Information ...............................................................1
Introduction ................................................................................................1
Receiver Performance Specications ........................................................3
Transmitter Performance Specications ....................................................5
Physical Specications ..............................................................................6
Channel and Bank Selection ......................................................................7
Radio Service Software Programming ...................................9
Introduction ................................................................................................9
Hardware Tuning and Troubleshooting .................................11
Repair Note .............................................................................................. 11
Recommended Test Equipment ............................................................... 12
Front Panel RJ45 Jack Pinouts ................................................................ 14
48 Pin Motherboard Interface Connector ................................................. 15
Receiver Troubleshooting ........................................................................ 16
Transmitter Troubleshooting .................................................................... 19
System Troubleshooting .......................................................................... 22
Radio System Congurations .............................................. 23
Repeater .................................................................................................. 23
Analog Fixed (Base) Station Interface ..................................................... 24
Digital Fixed (Base) Station Interface ...................................................... 24
Parts Lists ............................................................................ 25
MT-4E Receiver Electrical Parts List ........................................................ 25
MT-4E Receiver Mechanical Parts List .................................................... 26
MT-4E Receiver P25 Digital Firmware ..................................................... 26
MT-4E Receiver and Transmitter Encryption ........................................... 26
MT-4E Receiver and Transmitter RSS ..................................................... 26
MT-4E Transmitter Electrical Parts List .................................................... 27
MT-4E Transmitter Mechanical Parts List ................................................ 27
MT-4E Transmitter P25 Digital Firmware ................................................. 27
Glossary of Terms ................................................................ 29
Contents continued next page
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
vi This Page Intentionally Left Blank
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
1
GENERAL
INFORMATION
INTRODUCTION
The MT-4E Receiver and Transmitter are FM
radio modules capable of analog operation
in 12.5 kHz (narrow band) or 25 kHz (wide
band) channels. A rmware upgrade may be
purchased to allow P25 digital operation. The
VHF modules operate over the band from 136
to 174 MHz and the UHF modules operate
over the band from 406 to 470 MHz and 799 to
869 MHz (transmitter) or 406 to 430 MHz, 450
to 470 MHz, 470 to 520 MHz, 799 to 824 MHz
and 851 to 869 MHz (receiver). Modular design
allows each of the Receiver and Transmitter’s
internal modules to be individually assembled
and tested, which facilitates construction, tuning,
and general maintenance.
The MT-4E Receiver and Transmitter combine
state of the art performance in a compact
modular enclosure for applications ranging from
remote mountain top repeaters to congested
urban radio environments. Each module is
characterized by dependable, low maintenance
performance under the most severe
environmental conditions.
NOTE: The transmitter is not to be operated as a
repeater under an existing base station license.
The MT-4E Receiver and Transmitter are
primarily software controlled radio modules,
allowing tuning, programming and maintenance
to be done via software service with few
hardware adjustments required.
The MT-4E series is compatible with all Daniels’
subrack and base station enclosures. It supports
a basic analog interface, and may be used in
a mixed system with MT-3 and MT-4 series
Receivers and Transmitters.
P25 Digital Mode
When the P25 rmware upgrade is purchased,
the MT-4E family of receivers and transmitters
may be congured for P25 digital operation,
or mixed mode operation. In a repeater
conguration, the receiver passes the complete
P25 digital voice packet directly to the
transmitter so no P25 digital information is lost.
All P25 specications, operational description
and information contained in this Instruction
Manual require the P25 rmware upgrade to
function. If the MT-4E Receiver and Transmitter
are purchased without the P25 rmware
upgrade, the radio will program and operate in
analog mode only.
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
General Information
2
Secure Communications
The Receiver and Transmitter are capable of decoding and encoding secure communications if a
DES-OFB/AES encryption module is installed. To successfully decode or encode a transmission, the
encryption module must be programmed with a valid encryption key using the Motorola KVL 3000+
or KVL 3000 Keyloader in conjunction with a Daniels Keyloader Cable. The Daniels Keyloader cable
plugs into the front panel RJ45 jack on the front of the Receiver or Transmitter module. For correct
keyloading, the KVL must be setup to operate using ASN mode. ASN Mode is the default mode of
the KVL 3000 and an optional mode of the KVL 3000+. Consult the instructions for the Keyloader
for details on loading a key. A loaded key may be cleared by pulling rst the CLEAR KEYS 1 then
the CLEAR KEYS 2 inputs to ground 500ms apart. Alternately, the CI-BC-4E Base Controller may
be used to clear the keys for all modules in a system with a single key press of the switch marked
ZEROIZE KEY. The CI-BC-4E Base Controller can also be used to control whether the transmitter
outputs a secure or a clear signal.
Firmware Upgrades
Receiver and Transmitter rmware upgrading is performed with the PC-based Firmware Upgrade
software. A type A to 5 pin mini-type B USB cable is used to connect the USB port of an IBM
compatible computer to the USB port on the front panel of the Receiver or Transmitter module.
Firmware upgrades can be found on the Daniels Electronics Ltd. website at www.danelec.com.
MT-4E Receiver Family Models
There are eight models in the MT-4E Receiver family covering the 136 to 174 MHz, 406 to 430 MHz,
450 to 470 MHz and 470 to 520 MHz bands while operating in 12.5 kHz, 15 kHz, 25 kHz, or 30 kHz
occupied channel bandwidths. The receivers are classied as Class A or Class B. The eight models
are as follows:
VR-4E150-A0-000 synthesized, 136-174 MHz band, 12.5/15/25/30 kHz channels; Class A
UR-4E420-A0-000 synthesized, 406 - 430 MHz band, 12.5/15/25/30 kHz channels; Class A
UR-4E460-A0-000 synthesized, 450 - 470 MHz band, 12.5/15/25/30 kHz channels; Class A
UR-4E500-A0-000 synthesized, 470 - 520 MHz band, 12.5/15/25/30 kHz channels; Class A
VR-4E150-00-000 synthesized, 136-174 MHz band, 12.5/15/25/30 kHz channels; Class B
UR-4E420-00-000 synthesized, 406 - 430 MHz band, 12.5/15/25/30 kHz channels; Class B
UR-4E460-00-000 synthesized, 450 - 470 MHz band, 12.5/15/25/30 kHz channels; Class B
UR-4E500-00-000 synthesized, 470 - 520 MHz band, 12.5/15/25/30 kHz channels; Class B
UR-4E800-A0-000 synthesized, 799 - 824 MHz band, 12.5/25 kHz channels; Class A
UR-4E850-A0-000 synthesized, 851 - 869 MHz band, 12.5/25 kHz channels; Class A
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
General Information 3
RECEIVER PERFORMANCE SPECIFICATIONS
General
Frequency Range: 136 to 174 MHz / 406 to 430 MHz / 450 to 470 MHz / 470 to 520 MHz
799 to 824 MHz / 851 to 869 MHz
Channel Spacing: 12.5, 15, 25 & 30 kHz / 12.5 and 25 kHz for 799 to 869 MHz
Channel Selection: In 2.5, 5.0 or 6.25 kHz increments selected with Radio Programming
Software Package
Number of Channels: Preset capability for 2 banks of 16 channels
Channel Switching Range: ± 2.0 MHz / unlimited for 799 to 869 MHz
Compatibility: MT-3 and MT-4 Series Radio Systems; P25 interoperable*
System Impedance: 50 Ω (Type N connector)
Frequency Generation: Internal Synthesizer
Reference Sensitivity: -118 dBm (0.28uV) for 12 dB SINAD
-118 dBm (0.28uV) for 5 % BER*
Local Oscillator Frequency Stability: ± 1.0 ppm (VHF) / ± 0.5 ppm (UHF) / ± 0.1 ppm 799 to 869 MHZ
Adjacent Channel Rejection (Selectivity): Class A;
< -45 dB; Narrowband Analog
< -75 dB; Wideband Analog
< -60 dB; Digital*
Class B;
< -40 dB; Narrowband Analog
< -70 dB; Wideband Analog
< -60 dB; Digital*
Intermodulation Rejection: Class A;
< -75 dB; Narrowband and Wideband Analog
< -80 dB; Digital*
Class B;
< -70 dB; Narrowband and Wideband Analog
< -70 dB; Digital*
Spurious Response Rejection: Class A;
< -75 dB; Narrowband Analog
< -85 dB; Wideband Analog
< -90 dB; Digital*
Class B;
< -70 dB; Narrowband and Wideband Analog
< -70 dB; Digital*
Conducted Spurious Output Power: < -95 dBm
Hum and Noise Ratio: < -34 dB; Narrowband Analog
< -40 dB; Wideband Analog
Audio Output: 600 Ω balanced line output (congurable for unbalanced line);
De-emphasis or Flat output, +3 dBm maximum level
Audio Distortion: Analog; ≤ 2.0 % (25 °C); ≤ 3.0 % (-30˚C to +60˚C)
Digital as per TIA/EIA 102.CAAB*
Front Panel Controls: Receiver Power On (Norm) / Off
Squelch Disable (Push-button)
Analog & Digital Receive LED indicators
* P25 Digital specications are applicable only for modules with the P25 Digital rmware upgrade.
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
General Information
4
COR Interface: 150 mA, 50 V open drain power MOSFET
Supply Voltage: +13.8 VDC Nominal (range +10 to +17 VDC)
+9.5 VDC Regulated
Supply Current: Class A;
< 250 mA; with no encryption module installed
< 280 mA; with encryption module installed
Class B;
< 105 mA; with no encryption module installed
< 135 mA; with encryption module installed
Operating Temperature Range: -30°C to +60°C
Operating Humidity: 95 % RH (non-condensing) at +25°C
CTCSS Decode: Programmable to any of 42 CTCSS tones
DCS Decode: Programmable to any of 83 DCS sequences. Normal or inverted
DCS can be selected
IC Certication No.: n/a - Declaration of Conformity (DOC)
FCC ID: n/a - Declaration of Conformity (DOC)
* P25 Digital specications are applicable only for modules with the P25 Digital rmware upgrade.
MT-4E Transmitter Family Models
There are three models in the MT-4E Transmitter family covering the 136 to 174 MHz, 406 to
470 MHz bands, 470 to 520 MHz and 799 to 869 MHz. The four models are as follows:
VT-4E150-00-800 136–174 MHz band, 0.5–8.0 W
UT-4E450-00-800 406–470 MHz band, 0.5–8.0 W
UT-4E500-00-800 470–520 MHz band, 0.5–8.0 W
UT-4E850-00-300 799–869 MHz band, 0.5–4.0 W
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
General Information 5
TRANSMITTER PERFORMANCE SPECIFICATIONS
General
Frequency Range: 136 to 174 MHz / 406 to 470 MHz / 470 to 520 MHz / 799–869 MHz
Carrier Frequency Stability: ± 1.0 ppm (VHF) / ± 0.5 ppm (UHF) / 1 to .1 ppm 799–869 MHz
Channel Spacing: 12.5, 15, 25 & 30 kHz / 12.5 & 25 kHz 799–869 MHz
Channel Selection: In 2.5, 5.0 or 6.25 kHz increments selected with Radio Programming
Software Package
Number of Channels: Preset capability for 2 banks of 16 channels
Compatibility: MT-3 and MT-4 Series Radio Systems; P25 interoperable*
RF Output Power: 0.5 to 8.0 W Continuous / 0.5 – 4.0 W 799–869 MHz
Emission Designators: Analog: 11K0F3E (Narrowband); 16K0F3E (Wideband)
Digital Paging: 9K2F1D
P25 Digital: 8K10F1E (Digital Voice); 8K10F1D (Digital Data)*
System Impedance: 50 Ω; Type N connector
Duty Cycle: 100 %; Continuous operation
Undesired Emissions:
(Adjacent Channel Power Ratio)
< -70 dBc; Analog
< -70 dBc; Digital*
-80 dBc; 799–869 MHz
Intermodulation Attenuation: < -45 dB Analog
< -45 dB Digital*
Undesired Emissions:
(Conducted Spurious)
< -70 dBc @ 8 W
< -80 dBc @4.0 W & 799–869 MHz
VSWR Protection: < 20:1 VSWR at all phase angles
Operating Temperature Range: -30˚C to +60˚C
Operating Humidity: 95 % RH (non-condensing) at +25°C
Operating Voltage: +13.8 VDC Nominal (range +10 to +17 VDC)
+9.5 VDC Regulated
Transmit Current: < 1.7 A at 2 W RF Power Output
< 2.8 A at 8 W RF Power Output
< 1.8 A @ 4 W RF Output
Stand By Current: < 75 mA (no encryption modules installed)
< 105 mA (with encryption modules installed)
Front Panel Controls: Transmitter power On (Norm) / Off / Key Tx
Mic Mode: Analog / Digital
Analog & Digital Transmit LED indicators
PTT Time-Out-Timer: Programmable from 15 to 465 sec. (in increments of 1 sec.) or
innity (Default 300 sec.), using Radio Service Software package
Audio Input: Balanced, 600 Ω or optional unbalanced input
(600 Ω or 15k Ω selectable input impedance)
Audio Frequency Response: Pre-emphasis; +1, -3 dB (300 to 3000 Hz)
Audio Deviation Limiting: ± 2.5 kHz Narrowband, ± 5.0 kHz Wideband
Audio Distortion: < 3 % THD; 1 kHz tone at 1.5 kHz or 3 kHz deviation
FM Hum and Noise Ratio: < -34 dB (0.3 to 3.4 kHz De-Emphasis Off)
CTCSS Decode / Encode: Programmable to any of 42 CTCSS tones.
DCS Decode / Encode: Programmable to any of 83 DCS sequences. Normal or inverted
DCS can be selected. Turnoff code optional.
IC Certication No.: 142A-VT4E150 (VHF) / 142A-UT4E450 (UHF)
* P25 Digital specications are applicable only for modules with the P25 Digital rmware upgrade.
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
General Information
6
FCC ID: H4JVT-4E150 (VHF) / H4JUT-4E450 (UHF)
* P25 Digital specications are applicable only for modules with the P25 Digital rmware upgrade.
PHYSICAL SPECIFICATIONS
Physical Dimensions: Width:
7.1 cm (2.8 in)
Height:
12.8 cm (5.05 in)
Depth:
19 cm (7.5 in)
Module Weight: Receiver: 1.2 kg (2.5 lbs.)
Transmitter: 1.4 kg (3.0 lbs.)
Corrosion Prevention: Anodized aluminum construction
Stainless steel hardware
Gold plated module connectors
Module Design: • Compact Eurostandard modular design.
• Plug-in modules mate with the Daniels standard MT-3 subrack.
• Subracks / modules comply with IEEE 1101, DIN 41494 and IEC 297-3
(mechanical size / modular arrangement).
External Connections: RF Connection: type N connector located on the module front panel. Digital I/O
interface is made via RJ45 modular jack located on the front panel. Programming
interface is made via mini-type B USB 1.1 jack located on the front panel. Motherboard
Connections (Audio, Power, and Control) are made through a 48 pin, gold plated,
type F connector on the rear of the module. User connection made through mated
“motherboard” assembly of the radio subrack. Type F standard connector complies
with DIN 41612 Level 2 (200 mating cycles, 4 day 10 ppm SO2 gas test with no
functional impairment and no change in contact resistance).
Handle Text Colour: Red (VHF) / Black (UHF)
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
General Information 7
CHANNEL AND BANK SELECTION
Four channel select lines CSEL0-3 are named on the Motherboard, and are brought into the receiver
and transmitter modules by the 48 pin rear connector, allowing selection of 16 different channels.
These signals are normally pulled low in the receiver and transmitter, but are typically set by jumpers
on the Motherboard to select channel 1 by default. In addition, a bank select input is provided to
switch between Bank A and B, each of which has 16 channels. The Bank select line normally oats
high (+5 V), selecting Bank A, but may be pulled low or high externally.
Channel and Bank Select Line Mapping
The table below shows the relationship between the states of the bank and channel select lines.
Note that the channel select lines follow a binary pattern, but that the binary “0” represents channel 1.
The Bank A/B select line normally oats high (+5 V), selecting Bank A, but may be pulled low or high
externally via the Bank A/B select line.
BANK A/B CSEL3 CSEL2 CSEL1 CSEL0
Bank
Selected
Channel
Selected
HI LO LO LO LO A 1
HI LO LO LO HI A 2
HI LO LO HI LO A 3
HI LO LO HI HI A 4
HI LO HI LO LO A 5
HI LO HI LO HI A 6
HI LO HI HI LO A 7
HI LO HI HI HI A 8
HI HI LO LO LO A 9
HI HI LO LO HI A 10
HI HI LO HI LO A 11
HI HI LO HI HI A 12
HI HI HI LO LO A 13
HI HI HI LO HI A 14
HI HI HI HI LO A 15
HI HI HI HI HI A 16
LO LO LO LO LO B 1
LO LO LO LO HI B 2
LO LO LO HI LO B 3
LO LO LO HI HI B 4
LO LO HI LO LO B 5
LO LO HI LO HI B 6
LO LO HI HI LO B 7
LO LO HI HI HI B 8
LO HI LO LO LO B 9
LO HI LO LO HI B 10
LO HI LO HI LO B 11
LO HI LO HI HI B 12
LO HI HI LO LO B 13
LO HI HI LO HI B 14
LO HI HI HI LO B 15
LO HI HI HI HI B 16
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
8This Page Intentionally Left Blank
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
9
connection, open the Receiver or Transmitter
Conguration screen by clicking on the button
in the Main screen. Click on the Receiver or
Transmitter menu, then on the ID button. Click
on the ‘Read’ button. The serial number, model
number, rmware version and last programmed
date should appear in the appropriate elds.
Programming settings are divided into two
categories, Global options and Channel
options. When the Receiver or Transmitter
menu is selected from the main screen, both
the Global and Channel options for the current
channel are displayed. The RSS may be used
to save a Receiver or Transmitter conguration
to disk. This function allows the user to save
a “standard” conguration, and use it as a
starting conguration for all modules. An archive
of congurations from each radio system in
operation may also be kept so that replacement
radios can be programmed easily.
If the MT-4E Receiver or Transmitter is
purchased without the P25 Digital rmware
upgrade, the P25 Digital options will not be
available in the RSS software.
A service mode allows tuning, testing and setup
of the Receiver and Transmitter modules. Analog
and P25 Digital test modes may be selected
by the Radio Service Software, such as Bit
Error Rate testing andTest Pattern generation.
Adjustments may also be performed in the
Service mode, such as audio levels, RF power
output and reference oscillator adjustments. The
Service mode is covered in the Radio Service
Software Tuning Chapter.
RADIO SERVICE SOFTWARE
PROGRAMMING
INTRODUCTION
Receiver and Transmitter programming is
performed with the PC-based Radio Service
Software (RSS). A type A to 5 pin mini-type B
USB cable (included with the software) is used
to connect the USB port of an IBM compatible
computer to the USB port on the front panel
of the Receiver or Transmitter module. The
RSS allows the Receiver or Transmitter to be
programmed for operating frequencies, CTCSS
and DCS signaling, P25 Digital settings such as
NAC and TGID, modulation type and many other
parameters.
System Recommendations
• Microsoft Windows XP
Recommended Minimum Specication
• Pentium III Processor - 500 MHz
• 256 MB Memory (RAM)
• 1 GB Free Disk Space
Installation
The RSS should install automatically once the
CD is inserted. If not, run SETUP.EXE, located
on the CD.
Note: The Receiver and Transmitter must
be programmed separately.
Once the connections are made, the Radio
Service Software may be run on the computer
and the radio switched on. The rst time a
Receiver or Transmitter is connected, the USB
drivers will need to be installed from the CD
using the Hardware Update Wizard. To test the
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
10 This Page Intentionally Left Blank
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
11
HARDWARE TUNING AND
TROUBLESHOOTING
REPAIR NOTE
The MT-4E Receiver and Transmitter family
employ a high percentage of surface mount
components which should not be removed
or replaced using an ordinary soldering iron.
Removal and replacement of surface mount
components should be performed only with
specically designed surface mount rework
and repair stations complete with Electrostatic
Discharge (ESD) protection.
When removing Surface Mount Solder Jumpers,
it is recommended to use solder wick braid in
place of vacuum type de-soldering tools. This
will help prevent damage to the circuit boards.
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
Hardware Tuning and Troubleshooting
12
RECOMMENDED TEST EQUIPMENT
Alignment of the Receiver and/or Transmitter requires the following test equipment or its equivalent.
Power supply - Regulated +9.5 VDC at 2 A Phillips PM 2811
Power Supply - Regulated +13.8 VDC at 2 A Topward TPS-4000
Oscilloscope / Multimeter Fluke 97 Scopemeter
Current Meter: Fluke 75 multimeter
Communications Service Monitor (Analog) Marconi Instruments 2965A or equivalent
Communications Service Monitor (P25 Digital and Analog) IFR 2975
Alignment Tools Daniels A-TK-04
It is recommended that the radio communications test set be frequency locked to an external
reference (WWVH, GPS, Loran C) so that the high stability local oscillator may be accurately set to
within its ± 1 ppm frequency tolerance.
Complete Receiver and Transmitter Alignment
A complete Receiver and Transmitter Alignment is performed at the factory and should not be
required under normal circumstances. A large change in Receiver or Transmitter operating frequency,
as discussed in the next section, or a replacement of major Receiver or Transmitter sub-assembly
modules, may require a complete realignment operation.
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
Hardware Tuning and Troubleshooting 13
RECEIVER JUMPERS
Receiver Main Board
Jumper Default Position Function / Description
JU1 OUT When installed enables Clear Keys 1 Input
JU2 OUT When installed enables Clear Keys 2 Input
JU3 IN When installed enables power to Discriminator Output amplier
JU5 OUT When installed bypasses capacitance coupling on the Discriminator output
JU7 OUT When installed enables power to Discriminator Output LPF amplier
JU9 X X: 600 Ω Audio Transformer
Y: Bypass Transformer
JU10 X X: 600 Ω Audio Transformer
Y: Bypass Transformer
JU11 IN When installed enables power to Balanced Audio Output amplier
JU12 OUT When installed increases the gain of Balanced Audio Output amplier
JU13 OUT When installed selects 600 Ω resistance to ground
JU14 X X: 600 Ω Audio Transformer
Y: Bypass Transformer
TRANSMITTER JUMPERS
Transmitter Main Board
Jumper Default Position Function / Description
JU1 X X: A/D Front Panel Switch selects transmitter A/D mode
Y: A/D External Input selects transmitter A/D mode
JU2 YX: MIC OUT connects to Microphone Audio Input
Y: MIC IN connects to Microphone Audio input
JU3 X X: 600 Ω Audio Transformer
Y: Bypass Transformer
JU4 IN When installed selects 600 Ω resistance to ground
JU5 IN When installed enables Clear Keys 1 Input
JU6 IN When installed enables Clear Keys 2 Input
JU7 X X: 600 Ω Audio Transformer
Y: Bypass Transformer
JU8 X X: 600 Ω Audio Transformer
Y: Bypass Transformer
JU9 OUT When installed bypasses capacitance coupling on the Subtone / Direct
Modulation Input
Jumpers are shown on the MT-4E Transmitter
Jumper and Test Point Locator Illustrations.
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
Hardware Tuning and Troubleshooting
14
FRONT PANEL RJ45 JACK
PINOUTS
A single, 8 position RJ45 jack is mounted on the
front panel of the receiver and transmitter. The
following are the connections on the RJ45 jack.
Pin Signal
1CRYPTO MODULE KF
2 UNUSED SPARE
3ANALOG COR / PTT
4 LVDS DATA A
5 LVDS DATA B
6DIGITAL COR / PTT
7 NO CONNECTION
8 NO CONNECTION
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
Hardware Tuning and Troubleshooting
15
48 PIN MOTHERBOARD INTERFACE CONNECTOR
A 48 pin connector is used for interfacing the MT-3 Motherboard to the receiver and transmitter.
Receiver
Pin Name Pin Name Pin Name
D2 Relay Normally Open 1 [O/P] B2 +13.8 VDC [I/P] Z2 +13.8 VDC [I/P]
D4 Relay Common 1 [O/P] B4 Receive Secure / Clear* [O/P] Z4 No Connect
D6 Relay Normally Closed 1 [O/P] B6 +9.5 VDC [I/P] Z6 +9.5 VDC [I/P]
D8 Relay Normally Closed 2 [O/P] B8 No Connect Z8 No Connect
D10 Relay Common 2 [O/P] B10 Discriminator LPF [O/P] Z10 No Connect
D12 Relay Normally Open 2 [O/P] B12 COR* [O/P] Z12 COR* [O/P]
D14 Clear Keys 1* [I/P] B14 Discriminator [O/P] Z14 Squelch Override [I/P]
D16 Clear Keys 2* [I/P] B16 No Connect Z16 No Connect
D18 No Connect B18 No Connect Z18 Bank A/B* [I/P]
D20 Channel Select 0 (LSB) [I/P] B20 SM-3 Speaker Audio [O/P] Z20 No Connect
D22 Channel Select 1 [I/P] B22 No Connect Z22 No Connect
D24 Channel Select 2 [I/P] B24 Signal Strength (RSSI) [O/P] Z24 A/D Receive Mode [O/P]
D26 Channel Select 3 (MSB) [I/P] B26 Balanced Audio 1 [O/P] Z26 Balanced Audio 2 [O/P]
D28 No Connect B28 Mute* [I/P] Z28 No Connect
D30 No Connect B30 Ground Z30 Ground
D32 No Connect B32 Ground Z32 Ground
Transmitter
Pin Name Pin Name Pin Name
D2 No Connect B2 +13.8 VDC [I/P] Z2 +13.8 VDC [I/P]
D4 No Connect B4 Microphone Audio Output [O/P] Z4 Microphone Audio Input [I/P]
D6 No Connect B6 +9.5 VDC [I/P] Z6 +9.5 VDC [I/P]
D8 No Connect B8 Isolated Positive PTT [I/P] Z8 Isolated Negative PTT [I/P]
D10 No Connect B10 PTT* [I/P] Z10 PTT* [I/P]
D12 No Connect B12 Bank A/B* [I/P] Z12 Bank A/B* [I/P]
D14 Clear Keys 1* [I/P] B14 PTT* [I/P] Z14 PTT* [I/P]
D16 Clear Keys 2* [I/P] B16 No Connect Z16 No Connect
D18 No Connect B18 Balanced Audio 2 [I/P] Z18 Balanced Audio 1 [I/P]
D20 Channel Select 0 (LSB) [I/P] B20 SM-3 Speaker Audio [I/P] Z20 No Connect
D22 Channel Select 1 [I/P] B22 Subtone [I/P] Z22 No Connect
D24 Channel Select 2 [I/P] B24 PTT Output* [O/P] Z24 Transmit Secure / Clear* [I/P]
D26 Channel Select 3 (MSB) [I/P] B26 Forward Power Alarm* [O/P] Z26 High VSWR Alarm* [O/P]
D28 No Connect B28 No Connect Z28 A/D Mode Control [I/P]
D30 No Connect B30 Ground Z30 Ground
D32 No Connect B32 Ground Z32 Ground
* Indicates an active low signal.
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
Hardware Tuning and Troubleshooting
16
RECEIVER TROUBLESHOOTING
The receiver is composed of 4 main components; the Receiver Main Board, the Synthesizer Module,
the RF Preselector, and the Universal Daughter Board (UDB). An optional Decryption Board can be
installed in the Receiver.
These steps will help you determine the most likely sub-assembly that contains a fault, and may help
you determine what that fault is. The sub-assembly or the entire receiver can be sent back to Daniels
Service section for repair. Contact Daniels Service section before returning any product.
Before testing, the receiver should be in the subrack, or connected to the subrack by means of an
Extender card or kit, and the main power to the system (+13.8 VDC) and the +9.5 VDC regulated
supply should be checked via the front panel of the System Regulator.
Complete Receiver
Flip the receiver front panel ON/OFF switch from the OFF position to the NORM position and check
that the two front panel LEDs both turn ON for less than 5 seconds and then turn OFF. If this is not
the case, the most likely fault is on the UDB, on the Synthesizer, or on the Receiver Main Board. At
this stage make sure that the UDB and the synthesizer module are properly seated on the Receiver
Main Board.
Connect the Receiver to the PC with the USB cable and run the Radio Service Software (RSS).
Select (P25 or Analog) Receiver, click on Congure, then click on Read to read the Receiver
conguration. If the RSS returns “Device Not Responding”, physically inspect the USB cable and
connection, check the Daniels USB driver, and check that the USB is recognized by the Device
Manager. If the RSS still does not recognize the connection, the most likely fault is on the UDB.
Click on Rx ID, then click on Read to read the Receiver ID. Conrm that the Frequency Band in the
Synthesizer ID Model Number matches the Frequency Band in the Receiver Global Settings. If the
settings do not match, the synthesizer will require replacement, or the programming will need to be
changed to match the synthesizer hardware.
If the receiver still is not functioning properly the module level check should be conducted in the
following order:
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
Hardware Tuning and Troubleshooting 17
Receiver Main Board
Check the following test points on the receiver Main Board:
Test Point Signal Monitored Typical Voltage
TP1 Voltage from motherboard +13.8 VDC line +10 to +17 VDC
TP2 Regulated +9.5 VDC from motherboard +9.5 VDC ± 5 %
TP9 Switched +13.8 VDC line from front panel switch +10 to +17 VDC
TP37 +6.0 VDC supply +6.0 VDC ± 5 %
TP38 -6.0 VDC supply -6.0 VDC ± 5 %
TP54 +3.3 VDC supply +3.3 VDC ± 5 %
TP55 +1.2 VDC supply +1.2 VDC ± 5 %
TP56 +1.8 VDC supply +1.8 VDC ± 5 %
TP57 +2.5 VDC supply +2.5 VDC ± 5 %
TP58 +5.0 VDC supply +5.0 VDC ± 5 %
Test Points are shown on the MT-4E Receiver Jumper and Test Point Locator Illustrations.
If the test point voltages are within the specied range the following tests further verify that the
Receiver Main Board may not be the source of problem.
Apply an IF signal of frequency 21.4 MHz at a level of -30 dBm to the Receiver Main Board IF Input
SMB connector as shown on the MT-4E Receiver Top Component View (2). If the signal is properly
demodulated it proves that the Receiver Main Board and UDB are in working condition. Proceed to
the following step:
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
Hardware Tuning and Troubleshooting
18
Synthesizer and UDB Modules
The Synthesizer module and UDB are bound together through their communication link. At this level
of fault diagnosis it is not feasible to isolate the problem between two units.
If the receiver front panel ON/OFF switch is set from the OFF position to the NORM position and the two
front panel LEDs stay on, check that the Synthesizer and the UDB are properly seated on the Receiver
Main Board and check the following test points on the UDB (to access the UDB, the shield lid covering
the UDB will need to be removed as shown on the MT-4E Receiver Bottom Component View):
Test Point Signal Monitored Typical voltage
TP2 Logic power +3.3 VDC ± 5 %
TP3 DSP core supply +1.2 VDC ± 5 %
TP4 CPLD core supply +1.8 VDC ± 5 %
Test Points are shown on the MT-4E Receiver Jumper and Test Point Locator Illustrations.
If the UDB voltages are not within the specied tolerances, it is most likely that the Receiver Main
Board (that supplies these voltages to the UDB) is faulty or there is a short within the UDB.
If the UDB voltages are within the specied tolerances, inject a -70 dBm carrier on the Receiver
frequency into the RF Input and check the RSSI Meter reading in the Service section of the RSS. If
the RSSI Meter reading is low (< 30), perform the following test to verify that the synthesizer is locked
on frequency:
Disconnect the LO output SMB connector from the Synthesizer to the RF Preselector, as shown on
the MT-4E Receiver Top Component View (1), and connect the Synthesizer LO output to a radio
communication test set. Conrm that the synthesizer LO frequency matches the Target Synthesizer
RF OUT found in the Reference Oscillator area of the Service section on the RSS. The LO output
should be approximately +7 dBm.
Check that the LO output (21.4 MHz above or below the receiver frequency / 73.35 MHz @ 800 MHz)
of the synthesizer module is within the receiver frequency tolerances of ± 1.0 ppm (VHF) / ± 0.5 ppm
(UHF) and ± 0.1 ppm @ 800 mHz, and that the RF frequency will change with programmed channel
changes in the RSS. If this is not the case, it is most likely that the synthesizer or the UDB or both are
faulty. The fault may be associated with the synthesizer code, the DSP Code or both.
Receiver RF Preselector
Check the +9.5 VDC Power Supply wire to the RF Preselector as shown on the MT-4E Receiver Top
Component View (2). The supply voltage should be +9.5 VDC ± 5 %. inject a -30 dBm carrier on the
Receiver frequency into the RF Input and check the IF Output of the RF Preselector is 21.4 MHz and
73.35 MHz @ 800 MHz, and it can be demodulated through the communication test set. If this is not
the case the synthesizer, the RF Preselector or both are faulty.
To further isolate the fault, the LO output as shown on the MT-4E Receiver Top Component View (1)
can be disconnected from the Synthesizer, and an LO input can be applied from an external source to
the RF Preselector. The frequency of the external LO input should be the Target Synthesizer RF OUT
found in the Reference Oscillator area of the Service section on the RSS. Check the 21.4 MHz and
73.35 MHz @ 800 MHz output of the module using a communication test set.
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
Hardware Tuning and Troubleshooting 19
TRANSMITTER TROUBLESHOOTING
The Transmitter is composed of 4 main components, the Transmitter Main Board, the Synthesizer
Module, RF Power Amplier and Universal Daughter Board (UDB). An optional Encryption Board can
also be installed in the Transmitter.
These steps will help you determine the most likely sub-assembly that contains a fault, and may
help you determine what that fault is. The sub-assembly or the entire transmitter can be sent back to
Daniels Service section for repair. Contact Daniels Service section before returning any product.
Before testing, the transmitter should be in the subrack, or connected to the subrack by means of
an Extender card or kit, and the main power to the system (+13.8 VDC) and the +9.5 VDC regulated
supply should be checked via the front panel of the System Regulator. The transmitter RF output
should be terminated with a 50 Ω load, or communications test set.
Complete Transmitter
Flip the transmitter front panel NORMAL/OFF/ KEY TX switch from the OFF position to the NORMAL
position and check that the two front panel LEDs both turn ON for less than 2 seconds and then turn
OFF. If this is not the case, or the transmitter is not functioning properly, the following steps can be
taken:
Connect the Transmitter to the PC with the USB cable and run the Radio Service Software (RSS).
Select (P25 or Analog) Transmitter click on Congure, then click on Read to read the Transmitter
conguration. If the RSS returns “Device Not Responding”, physically inspect the USB cable and
connection, check the Daniels USB driver, and check the connection through the Device Manager. If
the RSS still does not recognize the connection, the most likely fault is on the UDB.
Click on Tx ID, then click on Read to read the Transmitter ID. Conrm that the Frequency Band in the
Synthesizer ID Model Number matches the Frequency Band in the Transmitter Global Settings. If the
settings do not match, the synthesizer will require replacement, or the programming will need to be
changed to match the synthesizer hardware.
If the transmitter still is not functioning properly the module level check should be conducted in the
following order:
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
Hardware Tuning and Troubleshooting
20
Transmitter Main Board
Check the following test points on the Transmitter Main Board:
Test Point Signal Monitored Typical voltage
TP1 Voltage from motherboard +13.8 VDC line +10 to +17 VDC
TP2 Regulated +9.5 VDC from motherboard +9.5 VDC ± 5 %
TP3 USB connector power +3.0 VDC or +5.0 VDC
TP4 Switched +13.8 VDC line from front panel switch +10 to +17 VDC
Test Points are shown on the MT-4E Transmitter Jumper and Test Point Locator Illustrations.
If the test point voltages are within the specied range, it is most likely that the Transmitter Main
Board is not the source of problem. Proceed to the following step:
Synthesizer and UDB Modules
The Synthesizer module and UDB are bound together through their communication link. At this level
of fault diagnosis it is not feasible to isolate the problem between two units.
If the transmitter front panel NORMAL/OFF/ KEY TX switch is set from the OFF position to the
NORMAL position and the two front panel LEDs stay on, check that the Synthesizer and the UDB
are properly seated on the Transmitter Main Board and check the following test points on the UDB
(to access the UDB, the Amplifer sub-assembly and the shield lid covering the UDB will need to be
removed as shown on the MT-4E Transmitter Amplier Removed View):
Test Point Signal Monitored Typical Voltage
TP2 Logic power +3.3 VDC ± 5 %
TP3 DSP core supply +1.2 VDC ± 5 %
TP4 CPLD core supply +1.8 VDC ± 5 %
Test Points are shown on the MT-4E Transmitter Jumper and Test Point Locator Illustrations.
If the UDB voltages are not within the specied tolerances, the Transmitter Main Board (that
supplies these voltages to the UDB) is most likely faulty. If the UDB voltages are within the specied
tolerances, it is most likely that the synthesizer or the UDB or both are faulty. The fault may be
associated with the synthesizer code, the DSP Code or both.
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
Hardware Tuning and Troubleshooting 21
If the transmitter front panel NORMAL/OFF/ KEY TX switch is set from the OFF position to the
NORMAL position and the two front panel LEDs both turn ON for less than 2 seconds and then turn
OFF and the RF output power control is set at its maximum in the Power Levels area of the Service
section on the RSS, but the RF output power is considerably less than 8 W and 4 W @ 800 MHz:
check that the synthesizer Reference Oscillator is set to internal reference in the System Setup;
Jumper Settings area of the Service section on the RSS.
check that the output of the synthesizer module on the RF cable as shown on the MT-4E Transmitter
Bottom Component View is 0 dBm (± 2 dBm) and that the RF frequency will change with programmed
channel changes in the RSS. If this is not the case, it is most likely that the synthesizer or the UDB or
both are faulty. The fault may be associated with the synthesizer code, the DSP Code or both.
Transmitter Amplier
Set the front panel switch on the transmitter to KEY TX and check that the Transmitter Output Power
is set appropriately. The output power can be adjusted in the Power Levels area of the
Service section on the RSS.
Check the following pins on connector J1 (while the transmitter is keyed):
Pin Signal Monitored Typical voltage
1RF Enable / Power Control (+0.5 to +3.0 VDC
corresponds to 0.5 to 8.0 W RF Power Output)
+0.5 to +3.0 VDC
2 Regulated +9.5 VDC from motherboard +9.5 VDC ± 5 %
3 Voltage from motherboard +13.8 VDC line +10 to +17 VDC
Pins are shown on the MT-4E Transmitter Bottom Component View.
If Pin 1 is not within tolerance, the most likely fault is in the UDB or Synthesizer module. If Pins 1, 2
and 3 are within the specied tolerances, and there is no RF output power, the most likely fault is in
the Amplier.
To test the RF power amplier sub-assembly, set the output power to maximum, using the Power Level
Adjustments in the Service mode of the RSS software and drive the input of the amplier with a 0 dBm
RF signal. Check that the RF power output is 8.0 W and 4.0 W @ 800 MHz when the front panel switch
is set to KEY TX.
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
Hardware Tuning and Troubleshooting
22
SYSTEM TROUBLESHOOTING
If the radio system is not receiving or transmitting on the right frequency, check the Channel and Bank
select lines of the Receiver and Transmitter modules. The Motherboard has jumpers that allow one of
16 channels to be selected on a receiver or transmitter. The factory default is to have them all set to
ground the channel select lines CSEL0-3, forcing the radio to operate on channel 1. On the receiver
and transmitter there is also a Bank A/B line which usually oats high selecting Bank A. The receiver
and transmitter have separate control of their channel select lines, so changing receiver channels
does not affect the transmitter channel.
If the Radio Service Software is failing partway through a read or write of the receiver, check that the
receiver is not squelching and unsquelching repeatedly during the read or write operation. Disconnect
the RF signal source from the receiver during the read or write operation.
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
23
RADIO SYSTEM
CONFIGURATIONS
REPEATER
The MT-4E series Receivers and Transmitters may be congured in a repeater conguration. The
standard way of setting up a repeater system is to connect the receiver to the transmitter through a
Radio Interconnect Cable plugged into the RJ45 CNTL BUS connectors on the front panels of each
radio module. This cable routes Analog and Digital COR / PTT signals and LVDS Serial Data from
the receiver to the transmitter in both Analog and P25 Digital mode. The Radio Interconnect Cable
may be connected directly from the receiver to the transmitter, or may be routed through a Repeater
Control Card.
A typical conguration is to set up the repeater to re-transmit an incoming signal in the same mode as
it is received (i.e. normally, you would want a received analog signal to be repeated as analog and a
received digital signal to be repeated as digital). This requires the Receiver and Transmitter modules
to be programmed in Mixed Mode of operation through the RSS software. The repeater may also be
programmed to operate in analog or P25 digital mode only.
Mixed Mode Repeat operation occurs as follows:
1. The receiver determines whether an incoming signal is analog or digital and asserts either the ANALOG
COR or DIGITAL COR signal line on the front panel RJ45 CNTL BUS connector. LVDS Serial Data is sent to
the RJ45 CNTL BUS connector as well.
2. The COR signal and LVDS Serial Data is transferred over the Radio Interconnect Cable directly to the
Transmitter or is routed through a Repeater Control Card.
3. The transmitter senses the incoming ANALOG PTT or DIGITAL PTT signal from the front panel RJ45 CNTL
BUS connector and keys up in analog mode or P25 digital mode. LVDS Serial Data is routed through the
transmitter for transmission.
An alternate way of setting up a repeater system is to connect the receiver to the transmitter through
an Audio Control Card or Base Controller. These control cards route analog audio and a single
COR / PTT signal from the receiver to the transmitter. This conguration is recommended for analog
repeater systems only.
The receiver and transmitter have no connection between them apart from the audio (Audio Control
Card or Base Controller only), COR / PTT signals and LVDS Serial Data lines. The transmitter does
not get any information from the receiver about which frequency or channel number to key up on.
The receiver and transmitter channel is determined by the state of the channel select lines and bank
select line.
NOTE: The transmitter is not to be operated as a repeater under an existing base station license.
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
Radio System Conguration
24
ANALOG FIXED (BASE)
STATION INTERFACE
The MT-4E series Receivers and Transmitters
may be congured in a xed (or base) station
conguration with an analog interface. An Audio
Control Card or Base Controller is added to
the system for E & M control. For Tone Remote
control of the system, a Tone Remote Adapter is
added to the system along with the Controller.
The Audio Control Card or Base Controller will
also allow for repeat capability of the system
using analog audio as the repeat path.
The Base Controller is used for system control
of encryption and decryption of the P25 digital
voice messages (the optional decryption /
encryption boards are required in the receiver /
transmitter modules).
DIGITAL FIXED (BASE)
STATION INTERFACE
The MT-4E series Receivers and Transmitters
may be congured in a xed (or base) station
conguration with a digital interface. A Universal
Interface Card is added to the system for
Ethernet control.
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
25
PARTS LISTS
MT-4E RECEIVER ELECTRICAL PARTS LIST
Part Number Description Product Quantity
A11-FE4-150 RF PRESELECTOR CLASS B,136-174 VHF CLASS B 1
A11-FE4A-150 RF PRESELECTOR CLASS A,136-174 VHF CLASS A 1
A13-FE4-420 RF PRESELECTOR CLASS B,406-430 UHF (406-430) CLASS B 1
A13-FE4A-420 RF PRESELECTOR CLASS A,406-430 UHF (406-430) CLASS A 1
A13-FE4-460 RF PRESELECTOR CLASS B,450-470 UHF (450-470) CLASS B 1
A13-FE4A-460 RF PRESELECTOR CLASS A,450-470 UHF (450-470) CLASS A 1
A13-FE4-500 RF PRESELECTOR CLASS B,470-520 UHF (470-520) CLASS B 1
A13-FE4A-500 RF PRESELECTOR CLASS A,470-520 UHF (470-520) CLASS A 1
A11-RX4E-MAIN RECEIVER MAIN BOARD ASSEMBLY ALL 1
A11-UDB UNIVERSAL DAUGHTER BOARD ALL 1
A64-OR4-150 SYNTHESIZER, RX, VHF,136-174 VHF 1
A64-OR4-440 SYNTHESIZER, RX ,UHF,406-470 UHF 1
A64-OR4-500 SYNTHESIZER, RX ,UHF,470-520 UHF 1
A64-0R4-800 SYNTHESIZER, RX ,UHF,799-869 UHF 1
A14-RX4E-Main RECEIVER MAIN BOARD ASSEMBLY 800 MHz 1
A15-FE4A-800 RF PRESELECTOR CLASS A 799–824 UHF 799–824 CLASS A 1
A15-FE4A-850 RF PRESELECTOR CLASS A 851–869 UHF 851–869 CLASS A 1
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
Parts Lists
26
MT-4E RECEIVER MECHANICAL PARTS LIST
Part Number Description Product Quantity
3536-10111405 LABEL/LEXAN, 14HP, VHF: RED VHF 1
3536-10131410 LABEL/LEXAN, 14HP, UHF: BLACK UHF 1
3702-10000120 FASTENER, QUICK RELEASE, GRAY ALL 4
3702-10000614 HANDLE, FRONT PANEL, 14HP,GREY ALL 1
3702-10001214 NAMEPLATE, BLANK, 14HP, ALUM. ALL 1
3702-62501010 CASE, 14HP RF PLUG-IN, MT-3 RX ALL 1
3702-63001101 PANEL, REAR,POS.1,14HP EXTRSN. ALL 1
3802-61001082 PANEL/FRONT,W/IDENT: MT-4E RX ALL 1
5630-12023250 GASKET, BeCu,3FINGER,.71”,CLIP ALL 2
5671-250N062B HOLE PLUG, .250” HOLE,NYL.,BLK ALL 1
5812-2M5FP14S SCREW, M2.5 x 14 FLAT/PHIL, A2 ALL 2
5812-2M5PP06S SCREW, M2.5 x 6, PAN/PHIL, A2 (E) ALL 3
5812-2M5PP12S SCREW, M2.5 x 12 PAN/PHIL, A2 ALL 1
5812-2M5PP14S SCREW, M2.5 x 14 PAN/PHIL, A2 (D) ALL 1
5812-2M5VP08S SCREW, M2.5x8,OVAL C/S/PHIL,A2 ALL 1
5812-3M0PP08T SCREW, M3 x 8, PAN/PHIL, BLACK ALL 4
5812-3M0VP06S SCREW, M3 x 6,OVAL C/S/PHIL,A2 (C) ALL 2
5812-3M0VP08S SCREW, M3 x 8,OVAL C/S/PHIL,A2 (A & B) ALL 6
5813-2M5SQ50Z NUT, M2.5, SQUARE-5mm, ZINC ALL 2
5814-3M0LK00S LOCKWASHER, M3, SPLIT,A2 STEEL ALL 4
MT-4E RECEIVER P25 DIGITAL FIRMWARE
Part Number Description Product Quantity
APP-FIRM01-W-XX DIGITAL UPGRADE FIRMWARE, MT-4E RX ALL 1
MT-4E RECEIVER AND TRANSMITTER ENCRYPTION
Part Number Description Product Quantity
ENCRYPT-MT4E-XX ENCRYPTION MODULE, MT-4E RX/TX ALL 1
MT-4E RECEIVER AND TRANSMITTER RSS
Part Number Description Product Quantity
APP-RSS03-WC-XX RADIO SERVICE SOFTWARE, MT-4E ALL 1
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
Parts Lists 27
MT-4E TRANSMITTER ELECTRICAL PARTS LIST
Part Number Description Product Quantity
A11-UDB UNIVERSAL DAUGHTER BOARD ALL 1
A21-TX4E-MAIN TRANSMITTER MAIN BOARD ASSEMBLY ALL 1
A21-VPA155-08 TX POWER AMP, VHF130-180 MHz VHF 1
A23-UPA450-08 TX POWER AMP, UHF 380-512 MHz UHF 1
A64-OT4-150 SYNTHESIZER, TX, VHF,136-174 MHz VHF 1
A64-OT4-440 SYNTHESIZER, TX, UHF,406-470 MHz UHF 1
A64-OT4-500 SYNTHESIZER, TX, UHF,470-520 MHz UHF 1
A64-0R4-800 SYNTHESIZER, TX, UHF,799-869 MHz UHF 1
A25-UPA835-03 TX POWER AMP, UHF, 799-869 MHz UHF 1
MT-4E TRANSMITTER MECHANICAL PARTS LIST
Part Number Description Product Quantity
3536-10111405 LABEL/LEXAN, 14HP, VHF: RED VHF 1
3536-10131410 LABEL/LEXAN, 14HP, UHF: BLACK UHF 1
3702-10000120 FASTENER, QUICK RELEASE, GRAY ALL 4
3702-10000614 HANDLE, FRONT PANEL, 14HP,GREY ALL 1
3702-10001214 NAMEPLATE, BLANK, 14HP, ALUM. ALL 1
3702-62502010 CASE, 14HP RF PLUG-IN, MT-3 TX ALL 1
3702-63002101 PANEL, REAR,POS.4,14HP EXTRSN. ALL 1
3802-61002121 PANEL/FRONT, W/IDENT: MT-4E TX ALL 1
5630-12023250 GASKET, BeCu,3FINGER,.71”,CLIP ALL 2
5671-250N062B HOLE PLUG, .250” HOLE,NYL.,BLK ALL 1
5812-2M5FP14S SCREW, M2.5 x 14 FLAT/PHIL, A2 ALL 2
5812-2M5PP06S SCREW, M2.5 x 6, PAN/PHIL, A2 (F) ALL 4
5812-2M5PP12S SCREW, M2.5 x 12 PAN/PHIL, A2 (E) ALL 2
5812-3M0PP06S SCREW, M3 X 6, PAN/PHILLIPS,A2 (D) ALL 2
5812-3M0PP08T SCREW, M3 x 8, PAN/PHIL, BLACK ALL 4
5812-3M0VP08S SCREW, M3 x 8,OVAL C/S/PHIL,A2 (A & C) ALL 6
5812-5M0FP08S SCREW, M5 x 8, FLAT/PHIL., A2 (B) ALL 4
5813-2M5SQ50Z NUT, M2.5, SQUARE-5mm, ZINC ALL 2
5814-3M0LK00S LOCKWASHER, M3, SPLIT,A2 STEEL ALL 4
7910-WP0WP011 CABLE,SMB PLUG-PLUG,RG316,11cm ALL 1
A89-MIC4-08 CABLE/CONN ASSY,MICROPHONE CON ALL 1
MT-4E TRANSMITTER P25 DIGITAL FIRMWARE
Part Number Description Product Quantity
APP-FIRM02-W-XX DIGITAL UPGRADE FIRMWARE, MT-4E TX ALL 1
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
28 This Page Intentionally Left Blank
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
29
GLOSSARY OF TERMS
AMBE+2™
Abbreviation for “Advanced Multi Band
Excitation”.
Bandwidth
The difference between the limiting
frequencies of a continuous frequency band.
Typically measured in Kilohertz. May be
considered the amount in kilohertz required
for a single communications channel.
BER
Abbreviation for “BIT Error Rate”
BPS
Abbreviation for BITs Per Second, a data
rate measure.
C4FM
The acronym for a 4-ary FM transmitter
which uses QPSK modulation to work with a
CFDD compatible receiver.
Channel
A single unidirectional or bidirectional path
for transmitting or receiving, or both, of
electrical or electromagnetic signals.
Channel Spacing
Typically measured in kilohertz from the
center of one channel to the center of the
next-adjacent-channel. May, or may not, be
identical to bandwidth.
Common Air Interface (CAI)
A radio to radio signal path dened in terms
of Access Method, Modulation Scheme,
Vocoding Method, Channel Data Rate and
Channel Data Format.
CTCSS
Abbreviation for “Continuous Tone-Controlled
Squelch System”.
DCS
Abbreviation for “Digital Coded Squelch”.
DSP
Abbreviation for “Digital Signal Processor” a
specialized microcomputer.
DTMF
Abbreviation for “Dual-Tone Multi-Frequency”
- a signaling scheme used by the telephone
system in which two voice band tones are
generated for each keypad key press.
Encryption
A coding of plain text (or clear voice) into
unintelligible forms for secure transmission.
Error Correction
Digital coding technique for detecting and
correcting information transmission errors.
FCC
Abbreviation for “Federal Communications
Commission”
Firmware
Software that is permanently stored in a
hardware device which allows reading and
executing the software, but not writing or
modifying the software.
Modulation
A controlled variation of any property of a
carrier wave for the purpose of transferring
information.
MT-4E VHF & UHF Receiver & Transmitter Instruction Manual
IM08-MT-4E-TXRX Project 1106
Glossary of Terms
30
LSB
Abbreviation for “Least Signicant BIT.”
MSB
Abbreviation for “Most Signicant BIT.”
NAC
Abbreviation for “Network Access Code.”
A twelve bit eld identifying the network of
the radio message. Typically used to steer
repeater functions.
PTT
Abbreviation for “Push-to-Talk”, the switch
on a subscriber unit which, when pressed,
causes the subscriber unit to transmit.
QPSK
Abbreviation for “Quadrature Phase Shift
Keying” modulation technique. PSK using
four phase states.
RF
Abbreviation for “Radio Frequency.”
Signal
The detectable transmitted energy which
carries information from a transmitter to a
receiver.
SINAD
Abbreviation for “SIgnal plus Noise And
Distortion” to “noise and distortion” ratio.
Squelch
A radio circuit that eliminates noise from
the speaker when no transmitted signal is
present.
Subscriber Unit
A mobile or portable radio unit used in a
radio system.
TGID
Abbreviation for “Talk-Group Identier.” A
sixteen bit eld identifying talk-group of the
radio message.
TIA
Abbreviation for “Telecommunications
Industry Association”
Time-Out-Timer
A function that limits the transmission
period to a pre-dened time. The user will
automatically stop transmitting when the
timer goes off after the pre-dened time.
VOCODER (Voice-Coder)
A type of voice coder. Usually consisting of a
speech analyzer and a speech synthesizer
which convert analog speech into digital
signals for transmission and digital signals
back into articial speech sounds for
reception.