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=+12=
28.
29.
30.
31.
32.
ACCESSORY
(АСС)
SOCKET
The table below shown terminal connections of this connector.
NOTE:
ІС-ВМ2/3 does not function with the IC-551D.
ACC SOCKET
CONNECTIONS
О) @ @ 0900);
Outside view
Output from squelch control stage.
(+7V when squelch is ON)
13.8 Volts DC in conjunction with the power switch operation.
(Max. 0.3A)
Connected to Push-to-talk, T/R change-over switch. When Ed
the
set operates in the transmit mode.
Output from the receiver detector stage.
Fixed output regardless of AF
output of AF gain.
Output from Transmitter MIC —
stage.
8 Volts DC available when
transmitting.
(relay can not be directly
actuated. Max. bmA)
|
Input for external ALC voltage.
Ground.
NC (no connection).
N
e=
MEMORY
POWER
TERMINAL
|
When a memory
power source is connected to this terminal, the power to the CPU of the
IC-551D is supplied continuously, even when the POWER Switch on the front panel is turned
OFF, to retain all the programmed frequencies in the Memory Channels, the operating fre-
quencies of the two VFO's, etc.
When the memory power source is not connected, all the
power, including that to the CPU, is turned OFF by turning OFF the POWER Switch, so that -
all the programmed frequencies in the Memory Channels, the operating frequencies of the two
УМЕО", etc., are erased.
-
SCOPE
TERMINAL
This terminal brings out the 9.0115MHz IF signal from the mixer in the receiver. Observation
of not only the received signal, but also of signals of the selected band width are possible by
using a panadaptor or panascope.
RECEIVER
INPUT
TERMINAL
This is an input terminal which is connected directly to the receiver.
RECEIVER
ANTENNA
OUTPUT
TERMINAL
i
This is a terminal to which received signals from the antenna connector are fed through after
the signal passes through the transmit/receive antenna switching circuit.
Usually the receiver
IN and OUT terminals are jumpered.
The receiver antenna output terminal is usually used
when another receiver is used or a preamplifier is connected to the IC-b51D.
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