Motorola LBI-38653 - Manual (Page 5)

Talkaround
Radio to radio direct communication is possible on a
per-channel basis. This is direct communication without the
use of a repeater.
Automatic Number Identification (A.N.I.)
As an option, one ID number per radio is programmed on
a per channel basis. The microprocessor generates the special
1600 Hz A.N.I. signal which is coded with a 4-bit phase
reversing code. It is sent at a 400 baud rate as part of the
handshaking preamble to a repeater just after PTT has been
pressed, or alternatively just after release of the PTT key.
A.N.I. is received and optionally demodulated by the repeater
as part of the system protocol when so installed.
Receive-Only Operation
Channels can be programmed to a receive-only operation.
Channels cannot be programmed for Transmit-only operation.
Busy Channel Lock Out
With Busy Channel Lock Out programmed, the radio
cannot transmit on a channel already busy. If the channel is
busy, fast pulsing beeps will sound (without stopping), until
the PTT switch is released. The radio must be programmed for,
and receiving, the correct Channel Guard. The combination of
Channel Guard and Busy Channel Lock Out prevents the user
from talking on a channel that is already in use (busy).
When the Busy Channel Lock Out option is enabled
without programmed Channel Guard, the user is prevented
from transmitting over a channel until there is no carrier
present in the channel.
Minimum Volume Level
The Front Panel VOLUME controls permit adjustment of
the audio level. Minimum levels are programmable. This
feature prevents missed calls due to a low volume level.
Power Level
Incremental transmitter power level change can be pro-
grammed to permit setting the output power to rated value. The
selected power level will be used for all channels.
Digital Channel Guard
Channel Guard provides a means of restricting calls to
specific radios through the use of a continuous tone coded
squelch system (CTCSS), or a multi-code digital squelch
system (DCG). Tone frequencies range from 67 Hz to 210.7
Hz. There are 83 standard programmable digital codes.
The Channel Guard tone frequencies and codes are soft-
ware programmable. Both tone frequencies and digital codes
may be mixed on each channel. The frequencies and codes are
shown in Tables 1 and 2. A Channel Number display that does
not flash, indicates that Channel Guard is enabled, or that
Channel guard is not programmed. A flashing Channel Num-
ber indicates that Channel Guard is programmed and disabled.
Table 1 - Channel Guard Tone Frequencies
Standard Tone Frequencies In Hertz
67.0 82.5 97.4 114.8 136.5 162.2 192.8
71.9 85.4 100.0 118.8 141.3 167.9 203.5
74.4 88.5 103.5 123.0 146.2 173.8 210.7
77.0 91.5 107.2 127.3 151.4 179.9
79.7 94.8 110.9 131.8 156.7 186.2
EXTERNAL SPEAKER (Optional)
The power connector provides a place to connect an
external speaker. The internal speaker must be disconnected
when an external speaker is used.
BATTERY POWER
The vehicle 12 volt battery with negative ground is all that
is required for operation of the radio. A cable connects the
battery to a male connector mounted on the back of the radio.
EASY ACCESSIBILITY
The radio circuitry is mostly contained on a single Main
Board, with the exception of the PA Board and the Front Panel
Board. Access to the Main Board and the inside of the radio is
easy with the removal of the top and bottom covers with two
screws each. Then the few adjustment controls (most are
adjusted with PC programming) can be easily reached. Four
more screws will permit removal of the front panel, giving
access to the Front Panel Board along with the switch and
indicator circuitry.
Table 2 - Primary and Equivalent Digital Codes (OCTAL)
PRIMARY
CODE
EQUIVALENT
CODE
PRIMARY
CODE
EQUIVALENT
CODE
PRIMARY
CODE
EQUIVALENT
CODE
023 340,766 132 605,634,714 237 464,642,772
025 133 413,620 243 267,342
026 566 134 273 245 370,554
031 374,643 135 205,610 246 542,653
032 136 502,712 252 661
036 137 142 174,270 254 314,612,706
037 560,627 143 333 255 425
043 355 144 466,666 262 316,431,730
047 375,707 145 525 266 655
051 520,771 147 303,306,761 271 427,510,762
053 150 256,703 274 652
054 405,675 152 366,415 276 326,432
056 465,656 153 606,630 307 362,565
057 172 155 233,660 311 330,456,561
060 116,737 156 517,741 312 515,663,743
065 301 157 322,503 315 321,673
066 734 161 345,532 317 546,614,751
067 516,720 162 416,553 324 343,570
071 603,717,746 163 460,607,654 325 550,626
072 470,701 164 207,732 331 372,507
073 640 165 354 332 433,552
074 360,721 171 265,426 344 471,664,715
075 501,624 176 244,417 346 616,635,724
076 203,754 212 253 351 353,435
104 226,557 213 263,736 356 521
107 365 217 371,453,530 363 436,443,444,662
114 327,615 222 445,457,575 446 467,511,672
115 534,674 223 350,475,750 447 473,474,731,744
117 411,756 224 313,506,574 452 524,765
122 535 225 536 454 513,545,564
123 632,657 227 261,567 455 533,551
125 173 231 504,631,636,745 462 472,623,725
127 412,441,711 234 423,563,621,713 523 647,726
130 364,641 235 611,671,723 526 562,645
131 572,702 236 251,704,742
LBI-38653 LBI-38653
4