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| 型號(hào)： | OPC-457 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | VHF MARINE TRANSCEIVER |
| 中文描述： | 甚高頻海洋收發(fā)器 |
| 文件頁(yè)數(shù)： | 18/36頁(yè) |
| 文件大?。?/td> | 545K |
| 代理商： | OPC-457 |
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4
DIGITAL SELECTIVE CALLING
14
I
All ships call transmission
Large ships use channel 70 as their
“
listening channel.
”
When
you want to announce a message to these ships, use the
“
all
ships call
”
function.
Select a simplex channel for
the traffic channel (for voice
communication after sending
the all ships call).
Some
‘
A
’
channels (eg. channel 88A) cannot be used.
Rotate [SQUELCH] clockwise until the audio noise disap-
pears.
While pushing [
9
ALL/IND] ro-
tate the channel selector to se-
lect
“
ALL
”
as at right.
Push and hold [
9
ALL/IND]
until you hear 4 short beeps
change to one long beep.
The display changes as at right.
Push [PTT] momentarily to
transmit the all ships call.
After transmission, the channel
set in step
above is selected.
USA
LOW
USA
LOW
USA
USA
LOW
USA
TX
Push and hold [PTT] again to send an announcement to
all ships.
NOTE:
Channel busy
When channel 70 is busy, the
all ships call is not transmit-
ted. The transceiver waits
until the channel is clear, then
transmits the call automati-
cally.
NOTE:
Error indication
When a transmission inhibited
channel (e.g. ch 70) is se-
lected for the traffic channel,
the display at right appears. In this case, an appropriate
channel must be selected.
This display may also appear if [9
ALL/IND] is accidentally
released early while being pushed and held in step
.
LOW
USA
BUSY
This display appears
while the call is in
standby.
LOW
USA
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