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Talkaround
Radio to radio direct communication is possible on a
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
Receive-Only Operation
Channels can be programmed to a
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
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 |
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79.7 | 94.8 | 110.9 | 131.8 | 156.7 | 186.2 |
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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)
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| PRIMARY | EQUIVALENT | PRIMARY | EQUIVALENT |
| PRIMARY | EQUIVALENT |
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| CODE | CODE | CODE | CODE |
| CODE | CODE |
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| 023 | 340,766 | 132 | 605,634,714 |
| 237 | 464,642,772 |
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| 025 |
| 133 | 413,620 |
| 243 | 267,342 |
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| 026 | 566 | 134 | 273 |
| 245 | 370,554 |
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| 031 | 374,643 | 135 | 205,610 |
| 246 | 542,653 |
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| 032 |
| 136 | 502,712 |
| 252 | 661 |
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| 036 | 137 | 142 | 174,270 |
| 254 | 314,612,706 |
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| 037 | 560,627 | 143 | 333 |
| 255 | 425 |
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| 043 | 355 | 144 | 466,666 |
| 262 | 316,431,730 |
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| 047 | 375,707 | 145 | 525 |
| 266 | 655 |
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| 051 | 520,771 | 147 | 303,306,761 |
| 271 | 427,510,762 |
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| 053 |
| 150 | 256,703 |
| 274 | 652 |
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| 054 | 405,675 | 152 | 366,415 |
| 276 | 326,432 |
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| 056 | 465,656 | 153 | 606,630 |
| 307 | 362,565 |
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| 057 | 172 | 155 | 233,660 |
| 311 | 330,456,561 |
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| 060 | 116,737 | 156 | 517,741 |
| 312 | 515,663,743 |
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| 065 | 301 | 157 | 322,503 |
| 315 | 321,673 |
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| 066 | 734 | 161 | 345,532 |
| 317 | 546,614,751 |
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| 067 | 516,720 | 162 | 416,553 |
| 324 | 343,570 |
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| 071 | 603,717,746 | 163 | 460,607,654 |
| 325 | 550,626 |
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| 072 | 470,701 | 164 | 207,732 |
| 331 | 372,507 |
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| 073 | 640 | 165 | 354 |
| 332 | 433,552 |
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| 074 | 360,721 | 171 | 265,426 |
| 344 | 471,664,715 |
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| 075 | 501,624 | 176 | 244,417 |
| 346 | 616,635,724 |
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| 076 | 203,754 | 212 | 253 |
| 351 | 353,435 |
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| 104 | 226,557 | 213 | 263,736 |
| 356 | 521 |
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| 107 | 365 | 217 | 371,453,530 |
| 363 | 436,443,444,662 |
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| 114 | 327,615 | 222 | 445,457,575 |
| 446 | 467,511,672 |
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| 115 | 534,674 | 223 | 350,475,750 |
| 447 | 473,474,731,744 |
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| 117 | 411,756 | 224 | 313,506,574 |
| 452 | 524,765 |
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| 122 | 535 | 225 | 536 |
| 454 | 513,545,564 |
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| 123 | 632,657 | 227 | 261,567 |
| 455 | 533,551 |
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| 125 | 173 | 231 | 504,631,636,745 |
| 462 | 472,623,725 |
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| 127 | 412,441,711 | 234 | 423,563,621,713 |
| 523 | 647,726 |
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| 130 | 364,641 | 235 | 611,671,723 |
| 526 | 562,645 |
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| 131 | 572,702 | 236 | 251,704,742 |
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