JRC JHS-770S Instruction Manual page 42

Names and Functions
USER ······ User defined key. Register a desired and assignable menu (e.g. frequently using) or a
・
special function.
DSC
······ A quick DSC routine call key. As well as this key, pressing
・
RTN
・ CH16 ······ Sets the radiotelephone to the priority channel (CH16) quickly.
4. MENU key
Displays menu list.
5. Jog dial
- On the status display, rotating the jog dial will change the channel.
- On a menu or popup screen, rotating the jog dial will move the cursor position or screen contents.
When selecting a button or an item on the screen, rotate the jog dial until the cursor is on it and then
press the jog dial.
Note
Press the jog dial to obtain access rights from other controller.
6. Handset connector
7. DISTRESS key (Under a clear cover with spring)
When in distress, sends a DSC distress alert after pressing for 4 seconds.
8. SQL (Squelch) control
Adjusts squelch level.
9. DIM (Dimmer) key
Adjusts a dimmer level (Max  Typ  Min  off) of LCD display and key switch. Additionally, used to
power off by pressing it with the
PWR
CONT
The adjusted dimmer level is not saved. So when the controller is powered off and on
Note
again, the dimmer level is always set to the Typ (default).
10. PWR/CONT (Power/Contrast) key
Turns on the equipment or makes the controller standby from the sleep mode. And after turned on, this key
is also used to adjust the LCD contrast .
11. VOL (Volume) control
Adjusts built-in loud speaker volume.
12. ALM (Alarm) lamp
Lights up red on any malfunction detected in the equipment or after sending a DSC distress alert, or blinks
red on receiving a DSC call. Lights green while the controller is in the sleep mode.
13. CANCEL key
Cancels menus or processes, or stops alarms. Additionally, opens the squelch temporarily while pressing it
on the status display. (Channel monitor function)
14. Handset
When using in radiotelephone mode, press and hold the PTT key to talk.
15. Cradle (for handset)
2-2
PWR
key at the same time (a confirmation screen will be displayed).
CONT
MENU+1 keys are also available.