59
FT-857 Operating Manual
T
RANSMITTER
O
PERATION
FM T
RANSMISSION
DCS Operation
Another form of tone access control is Digital Code Squelch, or DCS. It is a newer, more
advanced tone system that is less susceptible to false triggering than CTCSS. A DCS En-
coder/Decoder is built into your transceiver, and operation is very similar to that described
above for CTCSS.
1. Press the [
FUNC
] key momentarily, then rotate the
SELECT
knob, as needed, until
Multi Function Row “e” [
TON,
– – –
, TDCH
] appears on the display.
2. Press the [
A
](
TON
) key four times to activate the DCS Encoder/Decoder (the “
DCS
”
icon will appear on the display). The receiver will remain muted until a matching DCS
code is received on an incoming signal.
3. Press and hold in the [
B
] key for one sec-
ond. This instantly recalls Menu Mode
No-
033
[
DCS CODE
]
.
4. Rotate the
DIAL
to select the desired DCS
code, then press and hold in the [
FUNC
]
key for one second to save new setting and
exit to normal operation.
5. Press the [
A
](
TON
) key once to cancel DCS
operation (the “
DCS
” icon will disappear).
DCS Search Scanning
In operating situations where you don’t know the DCS code being used by another station,
you can command the radio to listen to the incoming signal and scan in search of the code
being used.
To scan for the DCS code in use:
1. Press the [
FUNC
] key momentarily, then rotate the SELECT knob, as needed, until
Multi Function Row “e” [
TON,
– – –
, TDCH
] appears on the display.
2. Press the [
A
](
TON
) key to activate DCS (the “
DCS
” icon will appear on the display).
3. Press the [
C
](
TDCH
) key to start scanning for the incoming DCS code.
4. When the radio detects the correct DCS code, it will halt on that code, and audio will be
allowed to pass.
5. The DCS code detected will be stored as the “current” code, so it may be used for
memory storage purposes, and you may now exit to normal operation.
DCS CODE
023 025 026 031 032 036 043 047 051 053
054 065 071 072 073 074 114 115 116 122
125 131 132 134 143 145 152 155 156 162
165 172 174 205 212 223 225 226 243 244
245 246 251 252 255 261 263 265 266 271
274 306 311 315 325 331 332 343 346 351
356 364 365 371 411 412 413 423 431 432
445 446 452 454 455 462 464 465 466 503
506 516 523 526 532 546 565 606 612 624
627 631 632 654 662 664 703 712 723 731
732 734 743 754
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