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參數(shù)資料
| 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)： | 22/36頁(yè) |
| 文件大?。?/td> | 545K |
| 代理商： | OPC-457 |
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4
DIGITAL SELECTIVE CALLING
18
When semi-automatic (SA; default) or manual (SL) is
selected in SET mode (p. 21):
Push and hold [9
ALL/IND] until
you hear 4 short beeps change
into one long beep to send
“
Able to comply
”
message.
If you want to send
“
Unable to
comply
”
message, or other indi-
vidual or all ships call, rotate the
channel selector to select them.
Push [PTT] momentarily to
transmit the acknowledge-
ment.
The channel speci
fi
ed by the call-
ing station is selected.
When
“
Unable to comply
”
is
transmitted in step
, the trans-
ceiver remains on channel 70.
After receiving a voice transmission, reply via the mic.
Differences between semi-automatic and manual
Semi-automatic:
When no op-
eration is performed, the
transceiver
automatically
sends an
“
Unable to comply
”
acknowledgement 4.5 min.
after the call is received.
Manual:
When no operation is performed after receiving a
call, NO acknowledgement is transmitted.
When full automatic (FA) is selected in SET mode
(p. 21):
The transceiver automatically replies to the call in one of
two ways, depending on the
auto acknowledge setting in
SET mode (p. 21).
When able to comply is set (Ab),
the transceiver automatically
transmits an able to comply ac-
knowledgement and then selects
the channel as specified by the
calling station for voice communications.
When unable to comply is set
(Un), the transceiver automati-
cally transmits an unable to com-
ply
acknowledgement
remains on channel 70.
and
LOW
USA
ACK
LOW
USA
ACK
USA
ACK
USA
RCV
TX
USA
LOW
ACK
USA
ACK
USA
TX
RCV
USA
ACK
USA
TX
ACK
LOW
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