Option Board (Opt); Aux A, Aux B, Aux C; Direct Channel Access; Channel Recall (Rcl) - Kenwood TK-790 Service Manual

TK-790/ ( B

17. Option Board (OPT)

If an optional Scrambler board has been installed in the
RADIO, Scrambler is activated by pressing the [OPT] Key. A
confirmation tone sounds, and the OPT icon is displayed. If
[OPT] is pressed again, a confirmation tone sounds, the OPT
icon goes off and the Scrambler will turn off.
If [OPT] is held down, the RADIO enters SCR Code Set
Mode. A confirmation tone sounds, and the display shows
CODE XX (XX=SCR Code). Change the SCR Code by press-
ing the [ ] and [ ] Keys, or rotating the UP/DOWN Knob.
Press [OPT] again, a confirmation tone sounds, the dis-
play returns to channel (SCR is ON), the SCR Code setting is
memorized, then SCR Code Set Mode will turn off.

18. AUX A, AUX B, AUX C

This function switches the accessory PF Output ports
which have been programmed with AUX A, AUX B and AUX
C.
Press [AUXA] Key. A confirmation tone sounds, the A
icon is displayed, and the AUX A Port is switched on (Low
level). If [AUXA] is pressed again, a confirmation tone
sounds, the A icon goes off and the AUX A Port is switched
off (open collector).
In the same way, [AUXB] Key controls the AUX B Port,
and [AUXC] Key controls the AUX C Port.

19. Direct Channel Access

This feature allows the radio operator to immediately se-
lect CHANNELs 1~5 which are contained in GROUP 1. To
select GR1-CH1, press [CH1]. To select GR1-CH2~5, press
[CH2] ~ [CH5],

20. Channel Recall (RCL)

This feature is enabled in scan mode.
This feature allows the radio operator to immediately ac-
cess the last called (Unmuted) channel by pressing [RCL].
The 3-digit display shows "RCL". Press [RCL] again, and the
radio returns to the previous channel.
21. Dimmer (DIM)
To adjust the brightness of the display backlight, TX/
BUSY LED, panel Keys backlight and microphone keys back-
light, press the [DIM] Key.
[DIM] controls the brightness at the same time as fol-
lows.
10
) /H ( B )
OPERATING FEATURES
Display TX/BUSY
backlight LED
Default High High
Press [DIM] Medium
once
Press again Low
Press again OFF OFF
Press again return to return to
High High
* The brightness setting is memorized.
22. Speaker 1-2 Mute (SPM)
; Dual Head Configuration only
This feature allows the radio operator to manually disable
the speaker audio of another control head.
Press the [SPM] Key, a confirmation tone sounds, and
the other head speaker is muted. Both head displays shows
X MUTE (X=Muted HEAD number).
This muted condition is canceled by both head keys with-
out PTT and Mic HOOK which is connected to Un-muted
head.
23. Mobile Relay Station (RPT)
; Dual Band Configuration only
This function allows the radio operator to use the RADIO
as a repeater.
(1) Both "Repeater Channel 1" and "Repeater Channel 2"
must be pre-programmed by the FPU. Each channels
must be on diferent bands.
(2) Press the [RPT] Key, then both the VHF and UHF units
move to the repeater channel, and enter Repeater mode.
Displays of both heads show "REPEATER".
(3) If one unit receives a proper signal, the other unit will
start transmitting (repeating).
(4) If the signal stops, the repeat action will stop. If one of
the units detects another signal, the repeat action will re-
start.
(5) Press [RPT] again, both units return to their previous
channels, and exit the Repeater mode. However, during
the repeating mode, pressing [RPT] has no effect.
24. Emargency Call (EMG)
If the [EMG] Key is held down, the RADIO enters the
Emergency Mode. In the Emergency Mode, the channel
changes to the "Emergency Channel (set by the FPU)" in-
ternally. The display depends on "Emergency Channel Dis-
play" setting, and the Emergency Call (None, DTMF, MSK or
ANI board) is transmitted.
If "ANI Board" is selected for the Emergency Type, turn
the transceiver off, then turn it on again to recover "Normal
Mode".
If "ANI Board" is not selected for the Emergency Type,
press and hold [EMG] key to recover "Normal Mode".
Panel Keys Microphone
backlight Keys backlight
High High
↓ ↓ ↓
↓ ↓ ↓
OFF OFF
return to return to
High High