Icom IC-M220 Instruction Manual - Page 47

Alarm Status, CH 70 SQL Level, Self-Test, Procedure, Safety, Routine, Warning, Self-Terminate

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7 DIGITAL SELECTIVE CALLING (DSC) Alarm Status Sets the alarm ON or OFF when receiving Self-Test The Self-Test sends DSC signals to 1 each type of DSC call. zz Safety the receiving AF circuit to compare the sending and receiving signals at the AF 2 zz Routine zz Warning level. 3 Sets the alarm for when: ••No MMSI code is entered. Push [ENT] to start the Self-Test. LL When the sending and receiving DSC 4 ••The position data has not been received for 2 minutes after turning ON the signals match, "OK" is displayed. 5 transceiver. ••The received position data has not been 6 updated for 10 minutes. ••The received position data has not been 7 updated for 4 hours. ••The manually entered position data has 8 not been updated for 23.5 hours. zz Self-Terminate 9 An alarm sounds when duplicate Distress calls are received. 10 zz Discrete An alarm sounds when a lower priority 11 call is received while receiving a high priority call. Procedure 12 (For only the USA version) CH 70 SQL Level Sets the Squelch level for Channel 70 to 1 ~ 10 or Open. You can select the type of task for the 13 transceiver, depending on the presetting. Single: Handles only 1 task at the same 14 time. Multiple: H andles up to 7 tasks at the 15 same time. 16 17 18 37

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DIGITAL SELECTIVE CALLING (DSC)
7
Alarm Status
Sets the alarm ON or OFF when receiving
each type of DSC call.
z
Safety
z
Routine
z
Warning
Sets the alarm for when:
• No MMSI code is entered.
• The position data has not been received
for 2 minutes after turning ON the
transceiver.
• The received position data has not been
updated for 10 minutes.
• The received position data has not been
updated for 4 hours.
• The manually entered position data has
not been updated for 23.5 hours.
z
Self-Terminate
An alarm sounds when duplicate
Distress calls are received.
z
Discrete
An alarm sounds when a lower priority
call is received while receiving a high
priority call.
CH 70 SQL Level
Sets the Squelch level for Channel 70 to
1 ~ 10 or Open.
Self-Test
The Self-Test sends DSC signals to
the receiving AF circuit to compare the
sending and receiving signals at the AF
level.
Push [ENT] to start the Self-Test.
L
When the sending and receiving DSC
signals match, “OK” is displayed.
Procedure
(For only the USA version)
You can select the type of task for the
transceiver, depending on the presetting.
Single:
Handles only 1 task at the same
time.
Multiple:
Handles up to 7 tasks at the
same time.