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FT-250R OPERATING MANUAL16
DCS OPERATION
Another form of tone access control is Digital Code Squelch, or DCS. It is a newer, more
advanced tone system which generally provides more immunity from false paging than
does CTCSS. The DCS Encoder/Decoder is built into your FT-250R, and operation is
very similar to that just described for CTCSS. Your repeater system may be configured for
DCS; if not, it is frequently quite useful in Simplex operation if your friend(s) use trans-
ceivers equipped with this advanced feature.
Just as in CTCSS operation, DCS requires that you set the Tone Mode to DCS and that
you select a tone code.
c
Press the
[
F/L
]
key, then immediately press the
[
1
(
SQ TYP
)
]
key. This provides a
“Short-cut” to Menu #25 (“
SQL TYPSQL TYP
SQL TYPSQL TYP
SQL TYP”).
d
Rotate the DIAL until “
DCSDCS
DCSDCS
DCS” appears on the display; this activates the DCS Encoder/
Decoder.
e
When you have made your selection of the DCS mode, press the PTT key.
f
Press the
[
F/L
]
key, then immediately press the
[
2
(
CODE
)
]
key. This provides a “Short-
cut” to Menu #27 (“
DCS SETDCS SET
DCS SETDCS SET
DCS SET”).
g
Rotate the DIAL to select the desired DCS Code (a three-digit number). Ask the re-
peater owner/operator if you don’t know DCS Code; if you are working simplex, just
set up the DCS Code to be the same as that used by your friend(s).
h
When you have made your selection, press the
[
F/L
]
key to save the new settings and
exit to normal operation.
Remember that the DCS is an Encode/Decode system, so your receiver will remain
muted until a matching DCS code is received on an incoming transmission. Switch the
DCS off when you’re just tuning around the band!
Advanced 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
20


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