Midland Radio 943110B VHF BASE TECH IV TRANSCEIVER User Manual User s Guide
Midland Radio Corporation VHF BASE TECH IV TRANSCEIVER User s Guide
User Manual
Operator’s Manual
Base Tech IV Series
94-3110B 110 Watt VHF P25 Base/Repeater
Station
94-4100B 100 Watt UHF P25 Base/Repeater
Station
Perspective picture here
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Base Tech IV P25 Base/Repeater Station
WARNING: The antenna(s) used for this transmitter must be
fixed-mounted on outdoor permanent structures with a
separation distance of at least 6 meters from all persons
during normal operation. The peak conducted output power
at each antenna terminal must not exceed 250 Watts and the
peak radiated output power must not exceed 1000 Watts
EIPR. Users and installers must ensure that FCC
requirements for satisfying RF exposure compliance are met.
(See FCC Rules Part 1, Sections 1307 and 1310)
NOTICE: 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. Patents 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.
2 © 2013, Midland Radio Corporation http://www.midlandradio.com
Base Tech IV P25 Base/Repeater Station
Contents
Contents .................................................................................. 3
Conventions and Symbols in this Book ................................... 4
Disclaimer ................................................................................ 4
Introduction .............................................................................. 4
Models.................................................................................. 4
Radio Features..................................................................... 5
Recommended Accessories ................................................ 6
Radio Controls ......................................................................... 6
Front Panel........................................................................... 6
Rear Panel ........................................................................... 7
Backlit LCD Details............................................................... 7
Setup........................................................................................ 8
Unpacking ............................................................................ 8
Installation ............................................................................ 8
Basic Operation ....................................................................... 9
Turning the Radio On and Off .............................................. 9
Channel Selection ................................................................ 9
Receiving Transmissions from Other Radios....................... 9
Transmitting to Other Radios ............................................. 11
Programmable Functions....................................................... 13
Message Display Quick Reference........................................ 15
Error Codes ........................................................................ 15
Specifications......................................................................... 16
Warranty Statement............................................................... 17
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Base Tech IV P25 Base/Repeater Station
Conventions and Symbols in this Book
This symbol marks a “caution”. Cautions are special
notices which you should read and follow carefully to
avoid possible damage to your equipment and to avoid
potential danger to yourself or other people.
! This symbol marks an “important point”. Important points
are specific instructions which should be followed closely
for proper operation.
This symbol marks a “note”. Notes are hints or tips which
offer additional information to help you.
Disclaimer
Midland Radio Corporation is committed to continuous quality
improvements, for this reason specifications may change without
prior notice.
Every effort has been made to ensure that the information in this
document is complete, accurate, and up-to-date. Midland
assumes no responsibility for the results of errors beyond its
control. The manufacturer of this equipment also cannot
guarantee that changes in the equipment made by unauthorized
people will not affect the transceiver’s performance or functions.
Introduction
Thank you for choosing the Midland Base Tech IV P25
Base/Repeater Station to meet your communication needs.
Properly used, this product will give you many years of reliable
service. To get the most out of your purchase, be sure to
carefully read this manual before operating the radio.
Models
There are two models in the Base Tech IV series.
94-3110B – 5 – 110 Watts VHF, 146-174 MHz.
94-4100B – 2 – 100 Watts UHF, 440-475 MHz.
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Base Tech IV P25 Base/Repeater Station
Radio Features
The Base Tech IV series base/repeater stations are
programmable, synthesized transceivers featuring:
5 P25 operation
5 Transmit power continuously variable up to 100 Watts,
UHF; 110 Watts, VHF.
5 12.5 KHz channel spacing.
5 4 programmable buttons. The function of each button is
assigned by dealer programming.
5 6 LED indicators for power-on, busy, transmit, alarm,
digital and repeat.
5 Multi-function rotary encoder knob for volume, channel,
squelch, and backlight level.
5 50 CTCSS tones and 83 CDCSS codes are
programmable per channel. In addition, a custom CTCSS
tone frequencies and a custom CDCSS are
programmable.
5 A busy channel lockout feature is programmable. An
override function is available to allow transmission during
repeater hangtime.
5 A transmit time-out timer may be programmed to limit
continuous transmission time. A penalty timer is also
programmable.
5 A talk-around function button may be programmed to
allow for repeater talk-around without using an additional
channel.
5 A configurable emergency mode may be activated by a
programmable function button.
5 A password function is available to prevent unauthorized
radio operation. When programmed, a four keypress
© 2013, Midland Radio Corporation http://www.midlandradio.com 5
Base Tech IV P25 Base/Repeater Station
sequence must be entered each time the radio is turned
on, in order to operate the radio.
Recommended Accessories
??? Replacement microphone
??? Desktop microphone
??? DTMF microphone
Radio Controls
Front Panel
1 3 4 2 5
front panel picture here
7 8 9 1
1. Power switch. Press and release to turn the transceiver on.
Press and release again to turn the transceiver off.
6
2. LED power indicator.
3. Multi-function rotary encoder. This knob is used for volume,
channel, squelch and backlight adjustments. Press to step
through the available functions. Rotate to change the level
for the selected function.
4. LED status indicators. Light to indicate:
BUSY Channel is busy
TRANSMIT Radio is transmitting
ALARM Radio is in alarm
DIGITAL Digital receive or transmit mode
REPEAT Repeat mode is selected
5. Backlit LCD display. A 4 line 20 character display providing
channel and operating information.
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Base Tech IV P25 Base/Repeater Station
6. Programmable function buttons. 4 buttons with dealer
programmed options/functions.
7. Internal front speaker.
8. USB type B programming jack.
9. 3.5 mm mono headphone jack.
10. RJ45 microphone jack.
Rear Panel
1 2
Rear panel picture here
3
5 6 7 8 9 4
1. DB25 expansion connector.
2. RJ45 tone remote/E&M connector.
3. Ethernet connector.
4. Remote switch.
5. Type N receiver input connector.
6. External reference input connector. BNC jack for connection
of optional 10 MHz reference oscillator.
7. Type N transmitter output connector.
8. Fuse holder.
9. 13.6 V DC power connector (negative ground only).
Backlit LCD Details
© 2013, Midland Radio Corporation http://www.midlandradio.com 7
Base Tech IV P25 Base/Repeater Station
Setup
Unpacking
The following items are supplied in the standard package:
5 One transceiver.
5 One palm microphone.
5 One DC power cord
5 One user’s manual.
Installation
Radio installation should only be done by qualified and trained
personnel, familiar with automotive electronics installation, and
FCC RF exposure guidelines. This transceiver should be
connected to a 12VDC power supply capable of 20 amps. More
complete installation instructions are available in the
corresponding radio service manual.
Antenna selection, installation and positioning requires
knowledge of RF radiation and exposure conditions and should
be performed by qualified personnel only. Please consult your
dealer or communications coordinator for more information.
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Base Tech IV P25 Base/Repeater Station
Basic Operation
! Before turning on your radio for the first time, you
should ensure power connections have been made
correctly and all antenna connections are proper
and secure.
Turning the Radio On and Off
Press and release the power button. The power LED should light
indicating the radio power is on. The radio will perform some
software loading and checks then display the channel. To turn
the radio off, press and release the power button again.
If “Password?” is displayed after turning on the radio, you must
enter the programmed password (4 keypress sequence) to use
the radio. Consult your dealer or communications coordinator if
you have further questions.
Channel Selection
Press and release the rotary encoder knob until the channel is
displayed. While the channel is being displayed, rotate the rotary
encoder knob to select the desired operating channel. Please
consult your dealer or communications coordinator regarding
channels programmed in your radio.
Receiving Transmissions from Other Radios
Each channel of your radio may be programmed for analog
receive operation, digital receive operation, or mixed (both)
receive operation. The following paragraphs describe these
modes of operation. Ask your dealer or communications
coordinator if you have questions on how your radio has been
programmed to operate.
Analog Receive Operation
If the channel is not programmed with CTCSS/CDCSS, a signal
that matches the programmed receive frequency will be heard if
it is of sufficient strength to exceed the squelch threshold. An on
frequency signal exceeding the squelch threshold level will be
indicated by a lit Busy indicator and speaker unmute indicator.
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Base Tech IV P25 Base/Repeater Station
CTCSS or CDCSS signaling adds an additional condition to
carrier squelch operation. In addition to the signal having to
exceed the squelch threshold level, the received signal must also
have the correct CTCSS tone or CDCSS code before the audio
will be passed to the speaker. CTCSS or CDCSS signaling
allows multiple users on the same frequency to hear only signals
which have their correct CTCSS tone or CDCSS code. An on
frequency signal with the correct CTCSS or CDCSS signaling
will be indicated by a lit Busy indicator and speaker unmute
indicator. A Busy indicator with the speaker mute indicator
means that the channel is busy, but the correct CTCSS or
CDCSS signaling is not present.
CTCSS/CDCSS allows multiple users to share the same
frequency. However CTCSS/CDCSS is only useful to
avoid disturbing other users with messages not related to
them. If more than one radio is transmitting at the same
time, this will cause interference. Do not transmit if the
Busy indicator is lit. Wait until the channel is clear before
transmitting.
Digital Receive Operation
When a P25 digital transmission is received, it will be heard if the
required conditions are met. P25 digital signals have several
mechanisms to allow users to hear only conversations intended
for them. A received P25 digital signal will be indicated by lit
Busy and Digital indicators.
The primary condition the P25 digital signal must match is the
Network Access Code, or NAC. The NAC provides much the
same functionality as CTCSS/CDCSS do for an analog signal.
The received signal will only be heard if the NAC from the
received signal is matched to the channel parameters. There is a
special NAC, hexadecimal F7E, which indicates to the receiver
to allow signals received with any NAC to be heard. This
provides much the same functionality as an analog signal without
CTCSS/CDCSS.
The P25 digital signal may be further addressed to everyone, to
a specific talk group, or to an individual unit ID. If the receiver is
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Base Tech IV P25 Base/Repeater Station
configured for normal digital squelch mode, all signals with
matching NAC will be heard. If the receiver is configured for
selective squelch mode, only signals addressed to the proper
talk group or individual ID will be heard.
Mixed Receive Operation
If the radio channel is programmed for mixed receive operation,
the radio will receive both analog and P25 digital signals. The
receiver will automatically switch to the appropriate mode
depending on which type of signal is detected. Analog and P25
digital receive operation is as described above.
Transmitting to Other Radios
! Before transmitting, the FCC requires you monitor
the channel to make sure it is clear. Transmitting
while someone else is transmitting will create
interference and disrupt both conversations.
The radio is capable of transmitting both analog and P25 digital
signals. The radio channel is configured for a default transmit
mode. The current transmit mode is indicated on the LCD
display, and by the lit Digital indicator (when digital TX Mode is
selected). A programmable function button may be set up to
allow the user to choose the desired transmit mode. Follow these
steps to transmit to other radios.
1. Check that the radio is in the desired transmit mode.
2. Monitor the channel by pressing the programmed function
button. Channel activity is also indicated by the lit Busy
indicator.
3. If the channel is clear, press and hold the push to talk (PTT)
switch on the side of the microphone.
4. The Transmit indicator will light while the radio is
transmitting.
5. Hold the microphone approximately 2 inches from your
mouth and speak across the face of the microphone in a
clear, normal voice.
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Base Tech IV P25 Base/Repeater Station
6. Keep the PTT switch pressed until you have finished
speaking.
7. Release the PTT switch to return to receive mode.
Press PTT before you start talking and release PTT after
you have finished speaking.
The radio might be programmed with a timeout timer
which will automatically end your transmission after a
preset time. In this case release PTT and wait for a few
seconds. The radio transmitter will be enabled again after
a few seconds. Ask your dealer or communications
coordinator for further details.
The radio might be programmed for busy channel lock
out, which automatically disables the transmitter if your
channel is busy. In this case wait until the channel is
clear.
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Base Tech IV P25 Base/Repeater Station
Programmable Functions
For increased flexibility and customization, the four front panel
buttons may be programmed with the following functions:
Monitor
Press and release this button to toggle the monitor mode. While
in monitor mode, the radio will receive any CTCSS/CDCSS/NAC.
P25 Squelch Mode
On digital or mixed mode receive channels, press and release
this button to toggle the digital squelch mode. While in normal
squelch mode the radio will receive all talk groups and individual
calls. While in selective squelch mode the radio will receive only
the programmed talk group and individual calls addressed to its
unit ID.
P25 Call Mode
Press and release this button to toggle the P25 call mode. While
in group call mode, the radio will transmit normal group calls with
the programmed talk group. While in individual call mode, the
radio will transmit individual calls to the selected unit ID. While in
all call mode, the radio will transmit group calls to talk group
65535 (everyone).
Transmit Power
Press and release this button to toggle the transmit power
selection. While in high power mode the radio will transmit at the
power level set by the high power adjustment. While in low
power mode the radio will transmit at the power level set by the
low power adjustment.
Transmit Mode
Press and release this button to toggle the transmit mode. The
radio will transmit analog or P25 digital signals based on the
selected transmit mode.
© 2013, Midland Radio Corporation http://www.midlandradio.com 13
Base Tech IV P25 Base/Repeater Station
Messaging Mode
Press and release this button to switch between the available
messaging modes. The available messaging modes include call
alert, radio check, radio inhibit, radio uninhibit, radio monitor,
status update, status request, short message and telephone dial.
Direct Channel
Press and release this button to switch to the configured
channel.
Emergency Mode
Press and hold for two seconds to activate the emergency
function. The configured emergency action will be performed.
Keylock
Press and hold for two seconds to lock all other front panel keys.
Press and hold again to unlock.
Talk Around
Press and release this button to shift the radio transmit
frequency to the programmed channel receive frequency. This
allows the radio to communicate directly with other radios, which
normally communicate through a repeater system. Press again
to change back to the programmed transmit frequency.
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Base Tech IV P25 Base/Repeater Station
Message Display Quick Reference
Error Codes
Display Description
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Base Tech IV P25 Base/Repeater Station
Specifications
General specifications 94-3110B
VHF
94-4100B
UHF
Frequency range 146-174 MHz 440-475 MHz
FCC ID number MMA943110B MMA944100B
FCC type acceptance Part 90 Part 90
Modulation type 11K0F3E/11K0F1D/11K0F2D 11K0F3E/11K0F1D/11K0F2D
Maximum number of channels 500 500
Channel spacing 12.5 KHz 12.5 KHz
Channel stepping 2.5/5/6.25 KHz 5/6.25 KHz
CTCSS/DCS per channel 50 CTCSS/83 CDCSS 50 CTCSS/83 CDCSS
Input voltage 13.6 Vdc ±15% 13.6 Vdc ±15%
Size (H x W x D) 3.4 x 18.2 x 14.2 in 3.4 x 18.2 x 14.2 in
(88 x 462 x 360 mm) (88 x 462 x 360 mm)
Weight 24 lbs (11 kg) 24 lbs (11 kg)
EIA/TIA-603 receiver specs
Frequency stability ±1.5 ppm (-30° to +60° C) ±1.5 ppm (-30° to +60° C)
12 dB SINAD sensitivity 0.3 µV 0.3 µV
Selectivity 80 dB 80 dB
Intermodulation rejection 85 dB 85 dB
Spurious rejection 100 dB 100 dB
Hum and noise (analog/digital) 45 dB/50 dB 45 dB/50 dB
Squelch sensitivity <12dB Sinad <12dB Sinad
Audio response per EIA/TIA-603 specs per EIA/TIA-603 specs
Audio output 1 Watts <5% THD into 8Ω 1 Watts <5% THD into 8Ω
RF input impedance 50 Ω 50 Ω
EIA/TIA-603 transmitter specs
RF power output 5-110 Watts 2-100 Watts
Frequency stability ±1.5 ppm (-30° to +60° C) ±1.5 ppm (-30° to +60° C)
Modulation limiting ±2.5 kHz ±2.5 kHz
Spurious emissions 80 dBc 80 dBc
FM hum & noise (analog/digital) 45 dB/50 dB 45 dB/50 dB
Audio response per EIA/TIA-603 specs per EIA/TIA-603 specs
Audio distortion <5% 1 KHz @ 60% dev. <5% 1 KHz @ 60% dev.
RF output impedance 50 Ω 50 Ω
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Base Tech IV P25 Base/Repeater Station
Warranty Statement
Midland Radio Corporation (herein, Midland) warrants each new radio product manufactured
or supplied by it to be free from defects in material and workmanship under normal use and
service for a period listed below, provided that the user has complied with the requirements
stated herein.
The Warranty period begins on the date of purchase from an Authorized Midland Sales and
Service Outlet. This Warranty is offered to the original end user and is not assignable or
transferable. Midland is not responsible for any ancillary equipment attached to or used in
conjunction with Midland products.
Midland offers to the original end user a Five (5) Year Limited Warranty on Midland Business
and Industrial Base Station/Repeater products. Accessories carry a One (1) Year Limited
Warranty.
During this period, if the product fails to function under normal use because of manufacturing
defect(s) or workmanship, it should be returned to the Authorized Midland Sales and Service
Outlet from which it was purchased. The Sales and Service Outlet will repair the product or
return the product for repair to Midland or its Authorized Repair Depot. The user is
responsible for the payment of any charges or expenses incurred for the removal of the
defective product from the vehicle or other site of its use; for the transportation of the product
to the Sales and Service Outlet; for the return of the repaired / replacement product to the
site of its use and for the reinstallation of the product.
Midland shall have no obligation to make repairs or to cause replacement required, which
results from normal wear and tear or is necessitated in whole or in part by catastrophe, fault
or negligence of the user, improper or unauthorized alterations or repairs to the Product,
incorrect wiring, use of the Product in a manner for which it was not designed or by causes
external to the Product. This Warranty is void if the product serial number is altered, defaced
or removed.
Midland’s sole obligation hereunder shall be to replace or repair the Product covered in this
Warranty. Replacement, at Midland’s option, may include a similar or higher-featured
product. Repair may include the replacement of parts or boards with functionally equivalent
reconditioned or new parts or boards. Replaced parts, accessories, batteries or boards are
warranted for the balance of the original time period. All replaced parts, accessories,
batteries or boards become the property of Midland.
THE EXPRESS WARRANTIES CONTAINED HEREIN ARE IN LIEU OF ALL OTHER
WARRANTIES, EITHER EXPRESSED OR IMPLIED OR STATUTORY, INCLUDING,
WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE.
FOR ANY PRODUCT WHICH DOES NOT COMPLY WITH THE WARRANTY SPECIFIED,
THE SOLE REMEDY WILL BE REPAIR OR REPLACEMENT. IN NO EVENT WILL
MIDLAND BE LIABLE TO THE BUYER OR ITS CUSTOMERS FOR ANY DAMAGES,
INCLUDING ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES,
OR FOR THE LOSS OF PROFIT, REVENUE OR DATA ARISING OUT OF THE USE OF
OR THE INABILITY TO USE THE PRODUCT.
This warranty is void for sales and deliveries outside of the U. S. A. and Canada.
© 2013, Midland Radio Corporation http://www.midlandradio.com 17
This device complies with Part 15 of the FCC Rules. Operation is
subject to the condition that this device does not cause harmful
interference.
This radio operates in FCC regulated frequency bands. All radios
must be licensed by the FCC before use. Because this radio
contains a transmitter, Federal law prohibits unauthorized use or
adjustments of this radio.
5900 PARRETTA DRIVE, KANSAS CITY, MISSOURI, 64120
PHONE: (816) 241-8500, FAX: (816) 241-5713
www.midlandradio.com
November 2012 Printed in USA