Yaesu FT-897 Operating Manual

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Page 34 FT-897 OPERATING MANUALDCS OperationAnother form of tone access control is Digital Code Squelch,or DCS. It is a newer, more advanced tone system that isless susceptible to false triggering than CTCSS. A DCS En-coder/Decoder is built into your transceiver, and operationis very similar to that described above for CTCSS.1. Press the [F] key momentarily, then rotate the MEM/VFO CH 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 DCSEncoder/Decoder (the “DCS” icon will appear on thedisplay). The receiver will remain muted until a match-ing DCS code is received on an incoming signal.3. Press and hold in the [B] key for one second. This in-stantly recalls Menu Mode No-033 [DCS CODE].4. Rotate the DIAL to select the desired DCS code, thenpress and hold in the [F] key for one second to save newsetting and exit to normal operation.FM T RANSMISSIONT RANSMITTER O PERATIONSplit Tone OperationThe FT-897 can be configured in a “Split Tone” configura-tion via the Menu mode.This allows you to encode a CTCSS Tone, decode a DCScode, encode (only) a DCS code, etc.1. Press and hold in the [F] key for one second to enter theMenu mode.2. Rotate the MEM/VFO CH knob to select Menu ModeNo-079 [SPLIT TONE].3. Rotate the DIAL knob to select “ON” (to enable the SplitTone feature).4. Press and hold in the [F] key for one second to save thenew setting and exit to normal operation.When the Split Tone feature is activated, the Multi FunctionRow “e” selection changes to [ENC, DEC, TDCH]. So, youcan set the desired encoder (by pressing [A](ENC) key, re-peatedly, if necessary) and decoder (by pressing the [B](DEC)key) separately.When the Split Tone feature is activated, you can see thefollowing additional parameters.T -T :Encodes a CTCSS Tone and Decodes a CTCSS ToneT -D :Encodes a CTCSS Tone and Decodes a DCS CodeT :CTCSS Tone Encode onlyD :DCS Encode onlyD-T :Encodes a DCS Code and Decodes a CTCSS ToneD-D :Encodes a DCS Code and Decodes a DCS CodeD :DCS Decode onlyT :CTCSS Tone Decode onlySplit Tone Frequency or DCS Code Setup1. Press and hold in the [A](ENC)(if you use CTCSS) or[B](DEC)(if you use DCS) key for one second. This in-stantly recalls Menu Mode No-083 [TONE FREQ] or No-033 [DCS CODE].2. Press the MEM/VFO CH knob momentarily, then rotatethe DIAL knob to select the “R” option. This is the toneyou Receive, i.e. the “Decode” tone.3. Rotate the DIAL knob to select the desired DecodeCTCSS frequency (or DCS code).4. Press the MEM/VFO CH knob momentarily, then rotatethe DIAL knob to select the “T” option. This is the toneyou Transmit, i.e. the “Encode” tone.5. Rotate the DIAL knob to select the desired EncodeCTCSS frequency (or DCS code).6. Press and hold in the [F] key for one second to save thenew setting and exit to normal operation.5. Press the [A](TON) key once to cancel DCS operation(the “DCS” icon will disappear).DCS Search ScanningIn operating situations where you don’t know the DCS codebeing used by another station, you can command the radioto listen to the incoming signal and scan in search of thecode being used.To scan for the DCS code in use:1. Press the [F] key momentarily, then rotate the MEM/VFO CH 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” iconwill appear on the display).3. Press the [C](TDCH) key to start scanning for the in-coming DCS code.4. When the radio detects the cor-rect DCS code, it will halt on thatcode, and audio will be allowedto 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 CODE023 025 026 031 032 036 043 047 051 053054 065 071 072 073 074 114 115 116 122125 131 132 134 143 145 152 155 156 162165 172 174 205 212 223 225 226 243 244245 246 251 252 255 261 263 265 266 271274 306 311 315 325 331 332 343 346 351356 364 365 371 411 412 413 423 431 432445 446 452 454 455 462 464 465 466 503506 516 523 526 532 546 565 606 612 624627 631 632 654 662 664 703 712 723 731732 734 743 754