lbi-39015 - mdx vhf mobile radio

lbi-39015 - mdx vhf mobile radio
LBI-39015
Mobile Communications
MDX
VHF MOBILE RADIO
TABLE OF CONTENTS
RF BOARD . . . . . . . . . . . . . . . . . . . . .
SYSTEM BOARD . . . . . . . . . . . . . . . . .
AUDIO/LOGIC BOARD . . . . . . . . . . . . . .
AUDIO AMPLIFIER BOARD . . . . . . . . . . .
FRONT CAP ASSEMBLY . . . . . . . . . . . . .
PA BOARD . . . . . . . . . . . . . . . . . . . . .
SERVICE SECTION . . . . . . . . . . . . . . . .
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LBI-39019
LBI-38842
LBI-39016
LBI-38844
LBI-38850
LBI-31921
LBI-39020
Printed in U.S.A.
Maintenance Manual
LBI-39015
LBI-39015
SPECIFICATIONS*
TABLE OF CONTENTS
Page
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
RF BOARD . . . .
Synthesizer
Transmitter
Receiver .
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FRONT CAP ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
Frequency Stability
± 2.5 PPM (± 0.00025%)
SYSTEM BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
Temperature Range
-30°C to 60°C (-22°F to +140°F)
ACCESSORIES AND OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
PC PROGRAMMER OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
PC PROGRAMMED OPTIONS . . . .
Carrier Control Timer (CCT) .
Channel Guard . . . . . . . . .
Squelch Tail Elimination (STE)
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3
3
3
4
Dimensions (H X W X D)
(Less Accessories)
Height
Width
Depth
5.3 cm (2.1 inches)
18.2 cm (7.2 inches)
24.0 cm (9.5 inches)
Weight
3.0 kg (6.6 pounds)
HARDWARE AND HARDWARE OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
Antenna Impedance
50 Ohms
CABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
NOISE SUPPRESSION KIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
POWER CABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
EXTERNAL SPEAKER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
EXTERNAL ALARM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
RADIO OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
USER INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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25/30 kHz (6.25 or 5 kHz resolution)
3
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Channel Spacing
AUDIO/LOGIC BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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0.01 Amperes (Maximum)
0.75 Amperes (Maximum)
3.5 Amperes (Maximum at 10 Watts audio, External Speaker)
10.5 Amperes (Maximum at 40 Watts RF)
3
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Battery Drain
Receiver (13.8 Vdc)
Off
Squelched
Unsquelched
Transmitter (13.8 Vdc)
POWER AMPLIFIER BOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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13.8 Volts *20%
3
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Operating Voltage
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GENERAL
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TRANSMITTER
Frequency Range
Low Split Radio
High Split Radio
136.0 to 153.0 MHz
150.0 to 174.0 MHz
Output Power
40 Watts (Intermittent duty cycle; EIA 20%)
4
Audio Sensitivity
110 mV RMS (typical)
PUBLIC ADDRESS OPTION OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7
Spurious and Harmonics
Less than -16 dBm
TYPE 99 OPTION OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
Audio Distortion
5% maximum
PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
Modulation Limiting
±5 kHz (Maximum)
ASSEMBLY DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
FM Hum and Noise
-45 dB
INTERCONNECTION DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
Audio Frequency Response
Within +1, -3 dB of a 6 dB/octave pre-emphasis curve from
300-3000 Hz
Continued
Copyright © March 1994, Ericsson GE Mobile Communications Inc.
1
LBI-39015
LBI-39015
Continued
Continued
SPECIFICATIONS*
STANDARD
RECEIVER
METHODS PROCEDURES
Mechanical Shock
516.2/Proc 1
516.3/Proc 1-6
516.4/Proc 1-6
136.0 to 153.0 MHz
150.0 to 174.0 MHz
Humidity
507.1
507.2
507.3
Salt Fog
509.1/Proc 1
509.2/Proc 1
509.3/Proc 1
Acceptable Frequency Displacement
± 2.5 kHz minimum
Blowing Dust
510.1/Proc 1
510.2/Proc 1
510.3/Proc 1
Sensitivity (12 dB SINAD)
-116 dBm maximum
Driven Rain
506.1/Proc 1
506.2/Proc 1
506.3/Proc 1
Spurious Rejection
-80 dB maximum
Frequency Range
Low Split Radio
High Split Radio
Image Rejection
U.S. Forest Service
Vibration:
Methods 7.15.1 and 8.11.1
-70 dB maximum
EIA
Vibration
Shock:
Adjacent Channel Selectivity
-80 dB maximum at * 30.0 kHz
Intermodulation Distortion
-75 dB maximum
Audio Frequency Response
Within +1/ -3 dB from 500 Hz to 2500 Hz, 6 dB/octave
attenuation from 300-500 Hz, 12 dB/octave attenuation from
2500-3000 Hz (per EIA/TIA-603)
Audio Output
10 Watts (External Speaker); 4 Watts (Internal Speaker)
7.5 Watts (External Speaker with remote mount kit)
Audio Distortion
5% maximum at 1 kHz
Hum and Noise
-45 dB maximum
RS152B Method 14.3 and RS206C Method 24.2
RS152B Method 15 and RS204C Method 25
ENVIRONMENTAL
STANDARD
METHODS PROCEDURES
Mil-810C
Mil-810D
Mil-810E
High Temperature
501.1/Proc 2
501.2/Proc 2
501.3/Proc 2
Low Temperature
502.1/Proc 2
502.2/Proc 2
502.3/Proc 2
Low Pressure
500.1/Proc 1
500.2/Proc 1
500.3/Proc 1, 2
Solar Radiation
505.1/Proc 1
505.2/Proc 1
505.3/Proc 1
Temperature Shock
503.1/Proc 2
503.2/Proc 1
503.3/Proc 1
Vibration
514.2/C8, P1
514.3/Proc 8
514.4/C8, P1
Continued
* These specifications are intended primarily for use by a service technician. Refer to the appropriate Specification Sheet for
complete specifications.
2
LBI-39015
LBI-39015
Synthesizer
DESCRIPTION
The Ericsson GE VHF MDX Mobile Radio is a synthesized, wide band radio that uses integrated circuits and microcomputer technology to provide high performance in
conventional communications systems. The VHF MDX Mobile radio provides 40 Watts of RF power output in the 136153 MHz or 150-174 MHz bands.
This radio operates in the conventional mode and can operate with tone Channel Guard, Digital Channel Guard, or carrier
squelch, depending on personality programming. The Channel
Guard range is 67.0 to 210.7 Hz. Squelch Tail Elimination
(STE) is used with Channel Guard to eliminate squelch tails at
the receiving radio by phase shifting the transmitted Channel
Guard tone when the Push-To-Talk (PTT) switch is released.
All radio functions are stored in a programmable Electrically Erasable PROM (EEPROM).
• Serial Programming Interface Module
TQ3370
• Programming Cable (19B801417P10)
TQ3372
• MDX Series Programming Software
TQ3346
With the interface equipment and software, the computer
can be used to program (or re-program) customer system frequencies, Channel Guard tones and options. Selection of options is done during radio initialization using the PC
programmer.
The VHF MDX Mobile Radio assembly contains the following circuit boards and assemblies:
The synthesizer circuit generates all transmit and receive
RF frequencies. The synthesizer frequency is controlled by the
microprocessor located on the Audio/Logic Board. Frequency
stability is maintained by a temperature compensated reference
oscillator module. Transmit audio is processed on the
Audio/Logic Board and applied to the synthesizer to modulate
the Voltage Controlled Oscillator (VCO) and the Temperature
Controlled Xtal (crystal) Oscillator (TCXO). The buffered
VCO output drives both the transmitter exciter and the receiver
mixer.
Transmitter
The transmitter consists of a fixed-tuned exciter module,
PA module and a power control circuit. The PA module provides RF output to drive the antenna. The power control circuit
controls the PA module to maintain constant output power
across the band. The RF output level is internally adjustable for
rated power. A thermistor control circuit protects the PA from
overheating by linearly reducing the power output level with
increasing temperature.
Receiver
The dual conversion receiver circuit consists of a front-end
section, 45 MHz first IF, a 455 kHz second IF and Frequency
Modulation (FM) detector. All audio processing and squelch
functions are accomplished on the Audio/Logic Board.
POWER AMPLIFIER BOARD
• Power Amplifier
19C851540
• RF Board
19D904958
• System Board
19D901891
• Audio/Logic Board
19D903963
• Audio Amplifier Board
19D904025
AUDIO/LOGIC BOARD
• Front Cap Assembly
19D904151
The Audio/Logic Board provides all audio and digital processing of the receive and transmit audio for digital processing
by the Logic Board. This board also contains audio filtering,
conventional analog tone processing and the receiver squelch.
The Audio/Logic Board controls the operation of the radio and
digitally processes the receiver and transmit audio. The board
contains a microprocessor and associated memory circuits including an Electrically Programmable Read Only Memory
(EPROM) for controlling the processor and a programmable
"personality" memory, an EEPROM to store customer frequencies, tones and options. The microprocessor provides control data to the Audio Signal Processor (ASP) conventional
tone generation and detection, frequency data for the synthe-
The circuit boards are all mounted on a main casting to
provide easy access for servicing. Interconnect plugs are used
to connect the boards to eliminate pinched wires and other wiring problems.
RF BOARD
The RF Board includes the programmable frequency synthesizer, transmitter exciter, receiver front-end and Intermediate Frequency (IF) circuitry.
The PA Board amplifies the RF board output, then connects
it back to the RF board where it is coupled through a PIN diode antenna switch, a low-pass filter and a directional coupler
to provide 40 watts power output at the antenna connector.
sizer and sends and receives data to/from another microprocessor on the Display Board for the alphanumeric LED display.
PC PROGRAMMED OPTIONS
SYSTEM BOARD
The Carrier Control Timer turns off the transmitter after
the microphone PTT switch has been keyed for a pre-programmed time period. A pulsing alert tone warns the operator to unkey and then key again the PTT to continue the
transmission. The timer can be programmed, using the PC
programmer. Any time period between 0 seconds and 4.1
minutes can be programmed in 10 second increments. The
timer can be enabled or disabled for each channel.
The system board controls the main input power to the
radio. The IGNITION SENSE input lead provides the necessary signals to the MOSFET switching circuit. The board
also interfaces all option connections from the internal
boards in the radio with the optional items outside of the radio. All external options for the radio, interconnect to the
System Board through the back of the radio using an optional cable.
FRONT CAP ASSEMBLY
The Front Cap Assembly contains the Audio Amplifier
Board. This board provides audio compression for the received audio in the discriminator internal/external speaker
audio paths. A 10-watt power amplifier is provided on the
board to drive a 4-ohm external speaker or the 8-ohm internal speaker.
ACCESSORIES AND OPTIONS
Carrier Control Timer (CCT)
Channel Guard
Channel Guard provides a means of restricting calls to
specified radios through the use of a Continuous Tone
Coded Squelch System (CTCSS), or a Continuous Digital
Coded Squelch System (CDCSS). Tone frequencies range
from 67.0 Hz to 210.7 Hz in 0.1 Hz steps. There are 83
standard PC programmable digital codes. The Channel
Guard tone frequencies and codes are software programmable. Both tone frequencies and digital codes may be used.
These codes and frequencies are listed in Table 1- Channel
Guard Tone Frequencies and Table 2- Digital Channel Guard
Codes.
PC PROGRAMMER OPTIONS
NOTE
The radio is programmed using an IBM compatible Personal Computer (PC) equipped with an RS-232 serial interface unit and the cable between the PC and the unit. An
auxiliary power supply for the unit is also included but is not
needed to program the radio.
To reverse the polarity of the digital Channel Guard
codes, in the PC programmer, type i (inverted) before the code number, i.e. i023.)
Option TQ3372 provides the MDX VHF radio programming cable between the PC interface unit and the radio microphone jack.
Table 1 - Standard Channel Guard Tone Frequencies (Hz)
67.0
71.9
74.4
77.0
79.7
82.5
85.4
88.5
91.5
94.8
97.4
100.0
103.5
107.2
110.9
114.8
118.8
123.0
127.3
131.8
136.5
141.3
146.2
151.4
156.7
162.2
167.9
173.8
179.9
186.2
192.8
203.5
210.7
3
LBI-39015
LBI-39015
Table 2 - Digital Channel Guard Codes
PRIM.
CODE
023
025
026
031
032
036
037
043
047
051
053
054
056
057
060
065
066
067
071
072
073
074
075
076
104
107
114
115
117
122
123
125
127
130
131
EQUIVALENT CODE
340,766
566
374,643
137
560,627
355
375,707
520,771
405,675
465,656
172
116,737
301
734
516,720
603,717,746
470,701
640
360,721
501,624
203,754
226,557
365
327,615
534,674
411,756
535
632,657
173
412,441,711
364,641
572,702
PRIM.
CODE
132
133
134
135
136
142
143
144
145
147
150
152
153
155
156
157
161
162
163
164
165
171
172
176
212
213
217
222
223
224
225
227
231
234
235
EQUIVALENT CODE
605,634,714
413,620
273
205,610
502,712
174,270
333
466,666
525
303,306,761
256,703
366,415
606,630
233,660
517,741
322,503
345,532
416
460,607,654
207,732
354
265,426
244,417
253
263,736
371,453,530
445,457,575
350,475,750
313,506,574
536
261,567
504,631,636,745
423,563,621,713
611,671,723
Squelch Tail Elimination (STE)
STE is used with tone and digital Channel Guard to
eliminate squelch tails. The STE burst is transmitted when
the microphone PTT switch is released. The receiving radio
decodes the burst and mutes the receiver audio for 250 ms.
This mute time allows the transmission to end and to mute
the squelch tail. The radio looks for STE on the received signal when the microphone is either on or off-hook.
4
CABLE OPTION PMCD7ZE
PRIM.
CODE
236
237
243
245
246
252
254
255
262
266
271
274
276
307
311
312
315
317
324
325
331
332
344
346
351
356
363
446
447
452
454
455
462
523
526
EQUIVALENT CODE
251,704,742
464,642,772
267,342
370,554
542,653
661
314,612,706
425
316,431,730
655
427,510,762
652
326,432
362,565
330,456,561
515,663,743
321,673
546,614,751
343,570
550,626
372,507
433,552
471,664,715
616,635,724
353,435
521
436,443,444,662
467,511,672
473,474,731,744
524,765
513,545,564
533,551
472,623,725
647,726
562,645
HARDWARE AND HARDWARE
OPTIONS
The location and placement of system hardware options
is shown on MDX Conventional Mobile Radio Interconnection Diagram 188D5198.
Cable Option PMCD7Z (19D851585P14) is used to bring
all option connections from the system Board through the back
of the radio to the outside. This cable is required with all external options.
NOISE SUPPRESSION KIT OPTION PMPD1A
Noise Suppression Kit, Option PMPD1A, consist of filter
19A148539G1 and Installation Manual LBI-31363. This kit is
available for installations where excessive alternator or electrical noises, present on the power cable, do not permit the radio
to operate properly. Refer to the Interconnect Diagram for the
radio and options.
POWER CABLE OPTION PMCD9A
The 18-foot Power Cable Option, PMCD9A
(19B801358P17) is available for installations requiring more
than the standard 9-foot cable.
EXTERNAL SPEAKER OPTION PMZM1T
External Speaker and Cable Option PMZM1T, provides the
user a 5-inch waterproof speaker in a LEXAN housing. Option
PMCC9M is an 18-inch interconnecting cable for the speaker.
The 10-Watt amplifier drives the speaker 4-ohm impedance.
The speaker leads are connected to Pins 2 and 9 of Cable option PMCD7Z (19D851585P14), using 18-inch external
speaker cable option PMCC9M (19A149590P8), included in
the option PMCD7Z. A 16-foot cable option PMCD1W
(19A149590) is also available.
When using the external speaker, the internal speaker
should be disconnected. The internal/external speaker switch
option PMPL3D allows use of both speakers (Refer to the Interconnection Diagram 188D5198).
EXTERNAL ALARM HORN RELAY OPTION
PMSU1C
External Alarm Horn Relay Option PMSU1C
(19A705499P1) can sound the vehicle horn when a call is received. The option connects to Pin 13 of cable option
PMCD7Z (19C851585P14) and is enabled through the front
panel switch.
RADIO OPERATION
A complete set of operating instructions for the MDX VHF
radio are provided in Operator’s Manual LBI-39012. A copy of
LBI-39012 is provided with each radio.
In the conventional mode of operation, the user selects a
channel and communicates on that channel in the conventional
mode. A system refers to a set of channels and a channel is a
transmit/receive radio frequency pair.
The exact operation of any radio depends upon the operating mode, the programming of the radio and the particular radio system. Most features described in these operating
instructions can be enabled or disabled through programming.
Both of these important factors must be considered when addressing the following instructions.
USER INTERFACE
Operating controls are located on the radio front panel and
microphone.
The Front panel Light Emitting Diode (LED) display provides radio status and communication control information for
the operator. The keypad is used for activation of various features and functions.
Turning The Radio On/Off
The radio is turned On/Off by pressing the PWR button in
the upper left corner of the front panel. To turn the radio OFF
press the PWR button again.
SCAN OPERATION
The SCAN function allow monitoring up to 16 receive
channels. The scanned channels may be any frequency within
the frequency band limits of the radio and may be Channel
Guard protected (tone/digital). All scan functions are retained
in memory, even if the 12 Volt battery is disconnected.
Any channel may be scanned with or without a priority
level. One channel may be programmed for Priority 1 (P1)
and another for Priority 2 (P2) with any or all remaining channels programmed as non-priorities.
RECEIVER SCAN RATE
The scan rate for the radio will vary depending upon the
number of channels programmed into the scan list and whether
or not Channel Guard is programmed. When scanning 16 inactive channels, the priority channels are sampled 11 times/second and the non-priority channels 3 times/second. The scan
rate will be faster when fewer channels are programmed into
can memory.
LBI-39015
LBI-39015
Scan operation will be determined by the following conditions:
4.
• PRIORITY 1, PRIORITY 2 AND NON-PRIORITY
PROGRAMMED
5.
The Priority 1, Priority 2 and up to 14 remaining channels
will be scanned. Once a carrier is detected and if programmed,
the correct Channel Guard is decoded, the LED display will indicate that channel. Sampling of the Priority 1 and Priority 2
channels continues while receiving a message. Should a Priority 1 or 2 channel carrier with the correct Channel Guard be
detected while a non-priority channel is being received, the applicable indicator, P1 or P2 lights and the channel is switched
to the Priority 1 or 2 channel regardless of what is being received on the non-priority channel.
• NON-PRIORITY PROGRAMMED
Press the programmed flex key, mapped to scan
add/delete, to add the channel to the scan list. The S
indicator will be shown in the display to indicate that
the channel is now in the scan program.
Repeat steps 2 through 4 for each channel, up to 16,
to be added to the scan list.
• PRIORITY 2 (P2)
1.
With scan off, select the desired P2 channel.
2.
Press the programmed flex key, mapped to scan
add/delete, twice. The displayed channel will now become the Priority 2 channel and the P2 indicator will
light to indicate that the channel is now in the scan list
as priority 2.
The selection of scan channels and priority is front panel
programmable the programmed flex key or menu mode.
A previous channel with priority will become a
non-priority scan channel when a new priority
channel is programmed.
• PRIORITY 1 (P1)
The Priority 1 channel may be added to the scan list by
one of three methods by PC programming the radio personality. Normally P1 is added using the front control panel
(Method 1).
• Method 1: FRONT PROGRAMMABLE
NOTE
The following, details how to add/delete channels using the flex key mapped to scan add/delete. The alternative is to select "SCAN A/D" in the menu mode.
Select the desired channel using the "-" button and
add/delete channels using the "+" button.
1.
With scan off, select the desired P1 channel.
2.
Press the programmed flex key, mapped to scan
add/delete, three times. The displayed channel will
now become the Priority 1 channel and the P1 indicator will light to indicate that the channel is
now in the scan list as priority 1.
• Method 2: FIXED P1 OPTION
• NON-PRIORITY (S)
1.
Confirm that the radio is turned on. If not, press the
POWER switch.
2.
If the SCAN indicator is lit, press and release the
SCAN switch to disable the scan function.
3.
Select the desired channel using the CHANNEL UP
and DOWN switch.
The P1 channel is PC programmed into the radio
personality.
• Method 3: SELECTED CHANNEL OPTION
This option is PC programmed into the radio
personality. Each time the scan function is turned on by
pushing the SCAN switch, the P1 channel becomes the
channel in the display (the SELECTED channel).
DISPLAY
1.
Confirm that the radio is on. If not, press the power
switch.
Channel Indicator
2.
If SCN indicator is lit, press and release the SCAN
switch to disable scan function.
While no signal is being received, the channel indicator
will always show the SELECTED channel. When an active
channel is received, the channel indicator will show the received channel.
3.
Select the desired channel to be removed from the
scan list using the CHANNEL UP or DOWN
switches.
SCN Indicator
4.
Press the programmed flex key, mapped to scan
add/delete, until all scan indicators (S, P1 and P2)
are off. This removes the selected channel from the
scan list.
When the SCAN button is pushed, the radio will light
the SCAN indicator and begin scanning. The SCN indicator
will flash when the microphone is placed off-hook to show
the radio is no longer scanning (only if the radio is PC programmed not to scan off-hook).
5.
Repeat preceding steps 2 through 4 for each channel to be removed from the scan list.
TRANSMITTING WHILE IN SCAN
NOTE
Up to 16 non-priority channels may be scanned. Once a
carrier is detected or correct Channel Guard is decoded, the
digital display will indicate the channel. Scan will stop and remain on the channel until the carrier disappears; after a few
seconds scanning resumes. The channels are scanned in descending order.
TO PROGRAM SCAN CHANNELS AND
SELECT PRIORITY
DELETE SCAN CHANNEL (S, P1, P2)
REVIEWING THE SCAN LIST
1.
Confirm that the radio is turned on. If not, press the
POWER switch.
2.
If the SCAN indicator is lit, press and release the
SCAN switch to disable the scan function.
3.
Select each channel (one at a time) using the
CHANNEL UP or DOWN switch and confirm
channels included on the scan list. The scan indicators (S, P1, P2) will light for each channel programmed.
USING THE RADIO WITH SCAN
THE SELECTED CHANNEL
The SELECTED channel is the channel in the display
when scan is turned on by pushing the SCAN switch. When
a signal is not being received, the radio reverts to this channel for transmitting. When a signal is being received, the radio reverts to this channel for transmitting. When a signal is
being received, the radio can be PC programmed to either revert to the SELECTED channel or remain on the received
channel.
The SELECTED channel does not necessarily have to
be a channel in the scan list. The SELECTED channel will
be temporarily entered into the scan list and scanned until
the SELECTED channel is changed.
Transmitter operation in scan is determined by the PC
programming of the radio personality. A flow chart is provided in this section to summarize the scan operation the following description.
Off-Hook Scan Not Enabled (default):
With off-hook scan not enabled (normal default condition), all scanning will stop when the microphone is placed
off-hook. The SCN indicator will flash to show all scanning
has stopped. If a signal is not being received when the microphone is placed off-hook, the radio will transmit on the
SELECTED channel. If a signal is being received when the
microphone is placed off-hook, the radio can be PC programmed (using the "scan transmit option" to either stay on
the receive channel or revert to the SELECTED channel.
When the microphone is placed back on-hook, the radio will
immediately start scanning, even if the received channel was
still active.
Off Hook Scan Enabled:
With off-hook scan enabled, moving the microphone off
-hook will not affect scan operation. The radio will continue
scanning. If a signal is not being received, the radio will
transmit on the SELECT channel. If a signal is being received, the radio can be PC programmed (using the "scan
transmit channel" option) to either stay on the receive channel or revert to the SELECTED channel when the microphone PTT is keyed.
When scan is turned off by pushing the SCAN switch,
the radio will return to the SELECTED channel.
5
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LBI-39015
grammable from 0.3 to 5 seconds on 0.1 seconds
steps. If no other channel activity occurs during this
time, scanning will then resume. The priority channels are still being sampled during the hang time.
MONITOR (CLR) SWITCH OPERATION IN
SCAN
The CLR switch does not operate while scanning inactive channels. When a channel becomes active, the CLR
switch operates only during the scan hang time after the
channel activity disappears.
2.
YES (default): If off-hook scan is enabled, after the
PTT is released, the radio will not stay on channel
but will immediately resume scanning. The scan
hang time will still be applied after a received carrier disappears.
CHANNEL CHANGES IN SCAN
Pushing the channel switches (UP or DOWN) while scan
is turned on will change the SELECTED channel assignment. If a signal is being received and the channel switches
are pushed, the radio will revert to the new SELECTED
channel assignment. The channel indicator display will show
the new assignment. After 2 seconds, if no activity appears
on the new SELECTED channel, scanning will resume. If
the SELECTED Channel is changed to a channel not in the
scan list, the new channel will be temporarily added to the
scan list until the SELECTED channel is changed again.
NO: If off-hook scan is enabled, when the PTT is
released, the radio will not stay on channel but will
immediately resume scanning. The scan hang time
will still be applied after a received carrier disappears.
3.
The SCAN function must be turned off to make any permanent changes (additions, deletions, priorities) to the scan
list. While in scan, temporary channel deletions may be
made to the scan list. The original scan list will be back in
effect by either turning scan off (by pushing the SCAN
switch) or by turning the radio power off and back on.
Temporary deletions cannot be made until the radio stops
on an active channel. P1 and P2 channels cannot be temporarily deleted.
PC PROGRAMMING SCAN OPTIONS
1.
Scan Hang Time:
A scan hang time is applied after the carrier on an
active channel disappears and after releasing the
transmitter PTT. The hang time prevents momentary signal fades from resuming scan (which would
cause big gaps in the receive audio ) and allows
time to respond to a received call. The hang time
also prevents the radio from immediately leaving
the channel and resuming scan when the PTT is released to allow time for a return call. The scan hang
time is normally 2 seconds in length and PC pro-
6
Scan For Channel Guard:
YES: The radio will stop scanning only on active
channels with the correct Channel Guard. If a scan
channel has Channel Guard programmed, the radio
will scan only on noise squelch operation for that
channel.
Temporary Channel Deletions:
When the radio stops scanning on an active channel, the
channel may be temporarily deleted by pressing the programmed flex key mapped to scan add/delete. The radio will
immediately resume scanning while skipping over the temporarily deleted channel.
Hang Time After PTT Release:
NO: The radio will ignore Channel Guard and scan
only on noise squelch operation.
4.
Scan Transmit Channel:
SELECTED channel (default): The radio will always revert to SELECTED channel when the microphone PTT is keyed or when the microphone is
placed off-hook (if off-hook scan is disabled). If
signals not being received, the radio will transmit
on the SELECTED channel.
5.
Off-Hook Scan Enable:
NO: (default): The radio will stop scanning and
flash the SCN indicator when the microphone is
off-hook. See the "scan transmit channel" description above to program where the radio will transmit.
YES: The radio will continue scanning with the microphone off-hook. See the "scan transmit channel"
description above to program where the radio will
transmit.
Figure 1 - Scan Operation Flow Chart
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6.
Priority 1 Channel Programming:
• Method 1 - Front programmable (default)
P1 is added to the scan list using the front control
panel.
• Method 2 - Fixed P1 Option
LBI-39015
scan sequence. If the number of non-priority channels is less
than or equal to four, then all non-priority channels will be
scanned between each P1, P2 scan.
As an added example, consider channels 1-8 to be scanned
channels, with P1 being channel 1 and P2 being channel 8. The
scanning order then would be:
c.
d.
P1 channel is PC programmed into the radio
personality.
• Method 3 - SELECTED channel option:
The P1 channel follows the SELECTED channel.
Each time the scan function is turned on by
pushing the SCAN switch, the P1 channel will then
follow any changes in the SELECTED channel
assignment when the channel switches are pushed.
DETAILED SCAN OPERATION
The scan operation is controlled by the Audio /Logic Board
and provides for scanning any or all of up to 16 channels. The
scanned channels may be located anywhere within the frequency band of the radio and can include two priority channels
(P1 and P2).
If desired, all 16 channels can be scanned with or without
priority level. When SCAN is enabled, scanning of the selected
channels starts immediately. Scan time is approximately 15 to
160 milliseconds per channel, depending upon whether Channel Guard has been programmed for a particular scan channel.
If a carrier is not detected, the scan time is 15 milliseconds. If a
carrier is detected and Channel Guard is programmed for the
channel, the scan time is 75-175 milliseconds, depending upon
how close the Channel Guard tone is to the desired tone. Typical value is less than 175 milliseconds.
Priority 1 (P1) and Priority 2 (P2) channels, if present, are
not part of the non-priority channel scan list (S1, S2, S3,...) and
are treated separately. If there is no activity on any of the
scanned channels, then the scan sequence is as shown in the
following example.
Since it takes approximately 15 to 160 milliseconds to scan
each channel, then each Priority channel is sampled every 0.09
to 0.96 seconds and the non-priority channels are sampled at
least once every 0.12 to 1.28 seconds. If Channel Guard is programmed for a channel, but no carrier is detected, the scan time
for that channel is 15 milliseconds.
Carrier on P1 and right Channel Guard
Stop scan, display P1
f.
Carrier on P2 and right Channel Guard
Display P2, scan P1
P1-P1-P1-P1-P1-P1...
tb=500 msec
ts=32 msec
g.
Carrier on P2 with right Channel Guard, carrier/wrong Channel Guard on P1
P1-P1-P1-P1-P1-...
tb=2.5 seconds
ts=75-175 msec
The following conditions are shown while listening to
a Non-Priority channel. The "ts" is the "hole" or audio
blanking time in the signal being heard while the radio
is checking the priority channels for activity.
a.
No carriers detected on P1 or P2
P1-P1-P2-P1-P1-P2-P1-P1-P2-...
tb (time between samples) =500 msec
ts (time of samples)
=32 msec
b.
Carrier on P1 detected/wrong Channel Guard
P1-P2-P2-P2-P2-P2-P1-P2-P2-P2-P2-P2-P1-P2-...
tb=1 second
ts=32 msec for P2
75 -175 msec for P1
c.
Carrier on P1 detected/right Channel Guard
Stop on P1, stop scan
d.
Carrier on P2
Stop on P2, scan P1
P1-P1-P1-P1-...
tb=500 msec
ts= 32 msec
e.
Carrier on P2 and P1 with wrong Channel Guard on
P1
Stop on P2, scan P1
P1-P1-P1-P1-P1-P1-...
tb=2.5 seconds
ts=75-175 msec
CONDITION 1: P1 and P2 have Channel Guard Programmed
Example 1: (More than four Non-priority channels, i.e., six channels)
P1-P2-S6-S5-S4-S3-P1-P2-S2-S1-S6-S5-P1-P2-S4-S3-S2-S1-P1-P2-...
a.
Example 2: (Four or less Non-Priority channels, i.e., three channels)
P1-P2-S3-S2-S1-P1-P2-S3-S2-S1-P1-P2-S3-S2-S1-P1-P2-S3-S2-S1-...
Therefore, the scan sequence is: Scan P1 and P2 programmed. Then scan up to four non-priority channels before
scanning P1 and P2 again. If more than four (4) non-priority
channels exist, then scan will wrap around, continuously scanning four channels of the non-priority list between each P1, P2
b.
No carriers detected on P1 or P2
P1-P1-P2-P1-P1-P2-P1-P1-P2...
tb (time between samples) =500 msec
ts (time of sample)
=32 msec
Carrier on P1 detected/wrong Channel Guard
P1-P2-P2-P2-P2-P2-P1-P2-P2-P2-P2-P2-P1...
tb=1 second
ts=32 msec for P2
75-175 msec for P2
CONDITION 3: P2 has Channel Guard, P1 does not
a.
No carriers detected on P1 or P2
P1-P1-P2-P1-P1-P2-P1-P1-P2-...
tb (time between samples) =500 msec
ts (time of samples
=32 msec
b.
Carrier on P2 detected/wrong Channel Guard
P1-P2-P1-P1-P1-P1-P1-P1-P1-P1-P1-P2-P1-...
tb=500 msec
ts=32 msec for P1
ts=32 msec
75-175 msec for P2
c.
Carrier on P2 detected/right Channel Guard
Stop on P2, scan P1
P1-P1-P1-P1-P1-P1-...
tb=500 msec
ts=32 msec
d.
Carrier on P1 detected
Stop on P1, stop scan
CONDITION 4: P1 and P2 with no Channel Guard
a.
No carriers detected on P1 or P2
P1-P1-P2-P1-P1-P2-P1-P1-P2-...
tb (time between samples) =500 msec
ts (time of sample)
=32 msec
b.
Carrier on P2
P1-P1-P1-P1-P1-P1-...
tb=500 msec
ts=32 msec
c.
Carrier on P1
Stop on P1, stop scan
CONDITION 2: Priority 1 has Channel Guard
Programmed, Priority 2 does not.
In order to show the various scan conditions, the following
conditions are used:
NOTE
Carrier on P1 and P2 detected/both wrong Channel
Guard
P1-P1-P2-P1-P1-P2-P1-P1-P2...
tb=2.5 seconds
ts=75-175 msec
e.
SCANNING (Stopped On A Valid SCAN Channel):
Once a carrier is detected, the channel display will indicate
that channel. If the channel is a non-priority channel and there
are no priority channels, then scanning is halted. If only a Priority 2 (P2) channel is present, then it is scanned every 5 seconds if it has Channel Guard programmed and carrier is
detected and every second otherwise. If there is only a Priority
1 (P1) channel, then it is sampled every 2.5 seconds if it has
Channel Guard and carrier is detected and every 500 milliseconds otherwise. If there are P1 and P2 Priority channels, the
sample rate will vary.
Carrier on P2 detected/wrong Channel Guard
P1-P2-P1-P1-P1-P1-P1-P1-P1-P1-P1-P2-P1...
tb=500 msec
ts=32 msec for P1
75-175 msec for P2
PUBLIC ADDRESS OPTION
OPERATION
If the Public Address Option is present, the radio may be
used as public address amplifier. Press the programmed flex
key or scroll through the menu to select the PA option (Scan
must be off). The LED display will show "Pub Addr".
When the microphone is keyed, the radio no longer transmits, but allows the microphone audio to feed the speaker.
Adjust the VOLUME for the desired level. Press the programmed flex key or scroll through the menu a second time
to disable the PA option. The display will return to normal
channel display. Changing channels or turning on Scan will
also turn the operation off.
7
LBI-39015
The Public Address microphone audio normally feeds an
external speaker. An ON/OFF switch, which is mounted on
or near the radio, allows selecting either the internal or external speaker for the receiver audio. The ON/OFF switch
turns the receiver audio on or off to the external speaker.
This switch still functions for the receiver audio with the PA
option disabled.
TYPE 99 OPTION OPERATION
If the Type 99 option is present, selective calling is possible. Press the programmed flex key or scroll through the
menu to select the T99 decoder option (Scan must be off).
The LED display will show "T99 ON" or "T99 OFF" for 2
seconds. During that time subsequent pressing of the flex
key or Group/SEL buttons will toggle the T99 state between
OFF and ON.
When a T99 call is received, the entire display will alternate between "T99" and the normal channel display and an
alert tone will sound. If a call has been received and the display is flashing, CLR must be pressed before the T99 option
can be turned off.
LBI-39015
ERICSSON GE TYPE 99 FORMAT
Tone frequencies in the Ericsson GE tone system fall
within the range of 517.5 to 997.5 Hz.
NOTE
A round-off error will occur when entering the tone
frequencies. This error is less than 0.2% and will not
cause any decoding problems. For example, it the
standard tone frequency of 517.5 Hz is entered, the
actual decoder frequency will be 517.4 Hz. This new
frequency will appear on the screen in the tone tables.
In the Ericsson GE tone format, the first tone may be
from tone group A (for individual or Group calls) or from
tone group C (for Super Group calls). The second tone may
be from tone group B (for individual calls) or from tone
group D (for Group and Super Group calls). The Ericsson
GE tone format is illustrated as follows:
ERICSSON GE TYPE 99 FORMAT
DETAILED TYPE 99 OPERATION
AND PROGRAMMING
The optional Type 99 Control Panel provides individual,
group and super group call decode. The Motorola Formatted
two-tone sequential signaling schemes can also be decode.
In Type 99 Tone systems, calls will not be heard from the
receiver until the proper two tones are detected. When the
second tone is decoded and recognized as correct, an alert
tone sounds during the remaining portion of the second tone.
The receiver audio path opens and remains open to receive
messages until the decoder is reset. The display will also
flash to show a call has been received.
TONE A
GAP
TONE B
GROUP CALL FORMAT
<----1.0 SEC----> <----200 MS----> <----1.0 SEC---->
±20%
±25%
+300% -0%
TONE A
GAP
TONE D
SUPER GROUP CALL FORMAT
The MDX radio can be PC programmed with up to three
separate tables of tones. Either the Ericsson GE Type 99 format or the Motorola format can be assigned to each tone table. The tone decoder can be enabled individually for each
channel. Once enabled, one of the three tone tables can be
selected for each channel. After choosing a tone table, the
call formats must be specified: Individual, Group and Super
Group for the Ericsson GE format or Individual, Group and
Quick-Call (In Motorola tone systems) allows communication between all radios in a system.
8
To determine the second tone frequency look in Table 3 and
as before, find the first digit of the paging number.
The second tone group is A. The third digit of the paging
number is a 3 and the Tone Designator is A3. In Table 3 read
down the column labeled "Tone designator" and find A3.
Read horizontally across to the column labeled "Tone Frequency". The second tone frequency is 802.5 Hz.
<----1.0 SEC----> <----200 MS----> <----1.0 SEC---->
±20%
±25%
+300% -0%
TONE C
GAP
TONE D
For example, assume the paging number to be 123. The
first digit of the paging number is a 1. Look in Table 3 and
read down the column labeled "100’s Digits" to a 1. Read
horizontally across to the column labeled "10’s Digit". The
tone group is B. The second digit of the paging number is a
2. The tone number is B2. Look in Table 3 and down the column labeled "Tone Designator" to find B2. Read horizon-
TONE
GROUP
A
For different paging numbers, locate the first digit in the
"100’s Digit" column and determine the tone frequencies as
described in the example. For a complete description of tone
applications see DATAFILE BULLETIN DF-5000-3A.
Tone D is the diagonal tone used (Ericsson GE tone systems only) when the first and second tone frequencies are the
same. The standard frequency for Tone D is 742.5 Hz, but may
be programmed with any tone frequency.
B
Table 3 - Tone Groups
100’s DIGIT
10’s DIGIT
1’s DIGIT
For 1st Tone
For 2nd Tone
0
A
A
1
B
A
2
B
B
3
A
B
4
C
C
5
C
A
6
C
B
7
A
C
8
B
C
9
Not Used
INDIVIDUAL CALL FORMAT
<----1.0 SEC----> <----200 MS----> <----1.0 SEC---->
±20%
±25%
+300% -0%
Table 4 - Tone Generator Frequencies
tally across to the column labeled "Tone Frequency". The first
tone frequency is 787.5 Hz.
C
TONE
DESIGNATOR
TONE
FREQUENCIES
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
682.5 Hz
592.5 Hz
757.5 Hz
802.5 Hz
847.5 Hz
892.5 Hz
937.5 Hz
547.5 Hz
727.5 Hz
637.5 Hz
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
652.5 Hz
607.5 Hz
787.5 Hz
823.5 Hz
877.5 Hz
922.5 Hz
967.5 Hz
517.5 Hz
562.5 Hz
697.5 Hz
C0
C1
C2
C3
C4
C5
C6
C7
C8
C9
667.5 Hz
712.5 Hz
772.5 Hz
817.5 Hz
862.5 Hz
907.5 Hz
952.5 Hz
532.5 Hz
577.5 Hz
622.5 Hz
Diagonal Tone
742.5 Hz
MOTOROLA FORMAT
Tone Frequencies in the Motorola tone system fall within
the range 288.5 to 1433.4 Hz.
NOTE
Tone frequencies above 1000 Hz must be rounded off
to the nearest Hz when programming the tone tables.
For example, the standard tone frequency of 1153.4 Hz
must be entered as 1153 Hz. Also, the program will
cause a round-off error of ±0.2 Hz for frequencies below 1000 Hz. These errors will not cause any decoding
problems.
LBI-39015
LBI-39015
In the Motorola tone format, the first tone may be one to
three tones: A for individual call, B for Quick-Call and C for
Group Call. The second or final tone is B in all cases.
The Motorola tone format is illustrated as follows:
INDIVIDUAL CALL FORMAT
<-1.0 SEC MIN->
<----NONE---->
<--3 SEC MIN-->
TONE A
GAP
TONE B
<-1.0 SEC MIN->
<----NONE---->
<--3 SEC MIN-->
TONE C
GAP
TONE B
GROUP CALL FORMAT
Table 5 - Motorola Type Code Numbers
First Digit of Group From Which Group From Which
Code
Tone A Is Selected
Tone B Is Selected
1
2
3
4
5
6
7
8
9
0
A
1
2
1
4
5
2
4
5
2
4
3
1
2
2
4
5
1
5
4
4
2
3
QUICK CALL FORMAT
Table 6 - Motorola Tone Frequencies and Groups
Tone
No.
Tone
Group 1
Tone
Group 2
Tone
Group 3
Tone
Group 4
Tone
Group 5
Tone
Group 6
1
2
3
4
5
6
7
8
9
0
349.0 Hz
368.5 Hz
389.0 Hz
410.8 Hz
433.7 Hz
457.9 Hz
483.5 Hz
510.5 Hz
539.0 Hz
330.5 Hz
600.9 Hz
634.5 Hz
669.9 Hz
707.3 Hz
746.8 Hz
788.5 Hz
832.5 Hz
879.0 Hz
928.1 Hz
569.1 Hz
288.5 Hz
296.5 Hz
305.7 Hz
313.0 Hz
953.7 Hz
979.9 Hz
1006.9 Hz
1034.7 Hz
1063.2 Hz
1092.4 Hz
339.6 Hz
358.6 Hz
378.6 Hz
399.8 Hz
422.1 Hz
445.7 Hz
470.5 Hz
496.8 Hz
524.6 Hz
321.7 Hz
584.8 Hz
617.4 Hz
651.9 Hz
688.3 Hz
726.8 Hz
767.4 Hz
810.2 Hz
855.5 Hz
903.2 Hz
553.9 Hz
1153.4 Hz
1185.2 Hz
1217.8 Hz
1251.4 Hz
1285.8 Hz
1321.2 Hz
1357.6 Hz
1395.0 Hz
1433.4 Hz
1122.5 Hz
Table 7 - Motorola Group Call Tone Groups (TG)
GROUP CALL (Quick-Call Format)
<-------------------------------8 SEC------------------------------->
TONE B
Tone Number
Tone Group
00-09
TG2
10-19
TG1
NOTE
20-29
TG2
Group Call code numbers range from 00 to 99. However, there are several group calls with the same Tone
B frequency. This limits the total number of groups
called to 40.
30-39
TG2
40-49
TG4
50-59
TG5
60-69
TG1
70-79
TG5
80-89
TG4
90-99
TG4
In Group Call application, the Tone Group is determined by
table 7, while the frequency is determined by Table 6. Refer to
the following examples.
INDIVIDUAL CALL
Tables 4 & 5 may also be used to determine the tone frequencies. The first digit of the code determines the tone groups
used in the code (See Table 4). Then Table 5 is used to determine the actual tone frequencies.
For a code of 124, the tone groups used are shown in Table
4. Tone A and Tone B are both located in Tone Group 1 and
Tone B is tone number 4. Refer to the following examples for
additional information.
EXAMPLE 1 - Code 098:
The "0" in Table 4 (First Digit of Code) shows that Tone A
is Tone Group 4 and Tone B is Tone Group 2 (See Table 5).
Tone number 9 in Tone Group 4 is 524.6 Hz
Tone number 8 in Tone Group 2 is 879.0 Hz
EXAMPLE 2 - Code 265:
EXAMPLE 1 - Group Call Code 07 (also code 27 and 37):
The digit "0" in Table 7 shows the Tone B is in Tone Group
2 (TG2) along with 20 to 29 and 30 to 39. Tone number 7 in
Tone Group 2 is 832.5 Hz (See Table 6).
EXAMPLE 2 - Group Call Code 98 (also code 48 and 88):
The digit "9" in Table 7 shows that Tone B is in Tone
Group (TG4) along with 40 to 49 and 80 to 89. Tone number 8
in Tone Group 4 is 496.8 Hz.
The digit "2" in Table 5 shows that both Tone A and Tone B
are both in Tone Group 2.
Tone number 6 is 788.5 Hz
Tone number 5 is 746.8 Hz
9
LBI-39015
PARTS LIST
MDX VHF MOBILE RADIO ASSEMBLY
19D904183P5 (
Issue 1
SYMBOL
PART NO.
DESCRIPTION
APPLICATION ASSEMBLY
19D904183
-------------------------ASSEMBLIES-----------------------
A1
19D904958G1
RF Board (136-153 MHz)
A1
19D904958G2
RF Board (150-174 MHz)
A3
19D901891G3
System Board
A4
19D904025G2
Audio Amplifier Board
A5
19D903963G2
Audio/Logic Board
19C851540G1
Power Amplifier Board (136-153 MHz)
19C851540G2
Power Amplifier Board (150-174 MHz)
---------------------------------KITS----------------------------
344A4253G1
Hardware Kit (No. 1)
344A4254G1
Hardware Kit (No. 2) Keycap
344A4255G1
Hardware Kit (No. 3) (136-153 MHz) RF Board
344A4255G2
Hardware Kit (No. 3) (150-174 MHz) RF Board
344A2456G1
Hardware Kit (No. 4) (136-153 MHz).PA Board
344A2456G2
Hardware Kit (No. 4) (150-174 MHz) PA Board
19A705301P6
Cable, Antenna
19A704884P3
Cable, J1 to J103
19B704884P4
Cable, J2 to J102
----------------------------CABLES----------------------
19B801467P1
Cable, J3 to J705 to J704
19A705235P3
Cable, Ribbon, J901 on Audio Amplifier to J902 on
System Board
19B801454P38
Cable, Antenna to J7
19B801454P37
Cable, TX to J101
19B802397P1
Cable, Handset
19D904027P1
Casting
------------------------MISCELLANEOUS------------------
19C337683G2
Bracket
19D904185G1
Cover, Bottom
19D904186G1
Cover, Top
19D904187G1
Panel, Front
19B801358P18
Cable, 9 Foot, Power
19B235310P10
Nameplate, Combination
MDX VHF Mobile Radio
(19D904183, Sh. 2, Rev. 4)
10
ASSEMBLY DIAGRAM
LBI-39015
LBI-39015
ASSEMBLY DIAGRAM
LBI-39015
MDX VHF Mobile Radio
(19D904183, Sh. 5, Rev. 4)
11
LBI-39015
MDX VHF Mobile Radio
(19D904183, Sh. 7, Rev. 1)
12
ASSEMBLY DIAGRAM
LBI-39015
LBI-39015
INTERCONNECTION DIAGRAM
LBI-39015
MDX VHF Mobile Radio
(188D5198, Sh. 1, Rev. 0)
13
LBI-39015
MDX VHF Mobile Radio
(188D5198, Sh. 3, Rev. 0)
14
INTERCONNECTION DIAGRAM
LBI-39015
LBI-39015
INTERCONNECTION DIAGRAM
LBI-39015
MDX VHF Mobile Radio
(188D5198, Sh. 4, Rev. 0)
15
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