Simrad - RS12 Operation and Installation Instructions
10
1-6 Basic Operation and Key Functions
All possible keys and their functions are listed here. Note that some of the keys may
not be available depending on your Simrad VHF radio model.
Key: Function:
VOL/PWR
Volume and Power
Turn clockwise to power on. Continue to turn until a comfortable volume is reached.
VOL/PWR will also adjust the settings of an external speaker, if connected.
SQL
Squelch or Threshold Level
Sets the threshold level for the minimum receiver signal. Turn fully counterclockwise
until random noise is heard, then turn slowly clockwise until the random noise
disappears. Make another 1/4 turn clockwise for best reception in open sea conditions.
In areas of high noise (eg. close to large cities) reception may improve if sensitivity is
reduced. Either turn SQL slowly clockwise or use the LOCAL setting. See section 2.3.
16 /
9
Priority Channel
Also on the handset mic. Press to cancel all other modes and to tune into the priority
channel. Press again to return to your original channel. The default Priority Channel is
CH16.
For US models:
To make Channel 09 the priority channel, hold down 16/9 until a
beep sounds and 09 is displayed.
DISTRESS
Send a DSC Distress Call
DSC must be active and an MMSI must be programmed. See Section 6.
PTT
Press To Talk
(Located on the handset mic). Press PTT to transmit at any time on an allowable
channel. This automatically exits you from menu mode and stops scanning. You must
release PTT to receive a signal.
If PTT sticks, a built-in timer will automatically shut down a transmission after five
minutes and sound a short error beep.
5 Key handset mic
RS12 base station radio
