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LBI-39015D
Table 2 - Digital Channel Guard Codes
PRIMARY
EQUIVALENT
PRIMARY
CODE
CODE
CODE
023
340 766
251
025
261
026
566
263
031
374 643
265
032
271
043
355
306
047
375 707
311
051
520 771
315
054
405 675
331
065
301
343
071
603 717 746
346
072
470 701
351
073
640
364
074
360 721
365
114
327 615
371
115
534 674
411
116
060 737
412
125
173
413
131
572 702
423
132
605 634 714
431
134
273
432
143
333
445
152
366 415
464
155
233 660
465
156
517 741
466
162
416 553
503
165
354
506
172
057
516
174
142 270
532
205
135 610
546
223
350 475 750
606
226
104 557
612
243
267 342
624
244
176 417
627
245
370 554
631
NOTE:
Primary codes in bold are unique Ericsson codes.
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 sig-
nal when the microphone is either on or off-hook.
4
EQUIVALENT
PRIMARY
EQUIVALENT
CODE
CODE
CODE
236 704 742
632
123 657
227 567
565
307 362
213 736
654
163 460 607
171 426
662
363 436 443 444
427 510 762
664
344 471 715
147 303 761
703
150 256
330 456 561
712
136 502
321 673
723
235 611 671
372 507
731
447 473 474 744
324 570
732
164 207
616 635 724
734
066
353 435
743
312 515 663
130 641
754
076 203
107
036
137
217 453 530
053
117 756
122
535
127 441 711
145
525
133 620
212
253
234 563 621 713
225
536
262 316 730
246
542 653
276 326
252
661
222 457 575
255
425
237 642 772
266
655
056 656
274
652
144 666
325
550 626
157 322
332
433 552
224 313 574
356
521
067 720
446
467 511 672
161 345
452
524 765
317 614 751
454
513 545 564
153 630
455
533 551
254 314 706
462
472 623 725
075 501
523
647 726
037 560
526
562 645
231 504 636 745
HARDWARE AND HARDWARE
OPTIONS
The location and placement of system hardware options
is shown on MDX Conventional Mobile Radio Interconnec-
tion Diagram 188D5198.
CABLE OPTION PMCD7Z
Cable Option PMCD7Z is used to bring all option connec-
tions 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 electri-
cal 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 op-
tion 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 In-
terconnection Diagram 188D5198).
EXTERNAL ALARM HORN RELAY OPTION
PMSU1C
External
Alarm
Horn
Relay
Option
PMSU1C
(19A705499P1) can sound the vehicle horn when a call is re-
ceived. 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 operat-
ing mode, the programming of the radio and the particular ra-
dio system. Most features described in these operating
instructions can be enabled or disabled through programming.
Both of these important factors must be considered when ad-
dressing the following instructions.
USER INTERFACE
Operating controls are located on the radio front panel and
microphone.
The Front panel Light Emitting Diode (LED) display pro-
vides radio status and communication control information for
the operator. The keypad is used for activation of various fea-
tures 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 chan-
nels 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 inac-
tive channels, the priority channels are sampled 11 times/sec-
ond and the non-priority channels 3 times/second. The scan
rate will be faster when fewer channels are programmed into
can memory.
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