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TERMINAL.
For best results use as heavy а gauge wire ог
strap
as possible
and
make
the
connection
as short
as
possible, even in mobile installations.
50. LOW
BAND
ANTENNA
(RL) TERMINAL
For connection of a low band antenna to receive 1600KHz
and below.
When operating frequency goes to 1600KHz
and below, the antenna terminal will be changed from (48)
ANTENNA connector to this terminal automatically.
By changing an internal
connector,
this terminal can be
used for a Transmit/Receive
relay control terminal.
This
terminal can be used to switch 24V 1A DC.
Don't exceed
this limit,
51. TRANSVERTER/SCOPE
(ALC)
TERMINAL
By changing internal connectors, this terminal can be used
for
a TRANSVERTER
terminal, SCOPE terminal, or exter-
nal ALC signal input terminal.
1. TRANSVERTER
|
VHF
and
ЏНЕ
operation
using а suitable transverter
with the IC-720A is possible.
This terminal is for Tran-
sverter
connection.
The
output
is a few
milliwatts.
Refer to the tranverters
instruction.
2. SCOPE
|
This terminal brings out the 39.7MHz IF signal from the
mixer
in the
receiver.
Not only observation
of the
received signal, but also of signals of a selected
band
width are possible by using a panadaptor or panascope.
3. EXTERNAL
ALC
This terminal can be used for an input terminal of exter-
nal ALC signal from a linear amplifier or transverter.
52. ACCESSORY
(ACC)
SOCKET
Various functions are available through the accessory socket
such
as frequency
control,
modulation
output,
receiver
output,
T/R
changeover,
and so forth.
The table below
shows those terminals.
ACC SOCKET
CONNECTIONS
0720090)
Outside view
FUNCTION
NC (no connection)
13.8 Volts DC in conjunction with the power
switch operation.
Connected
to
Push-to-talk,
T/R
change-over
switch.
When grounded, the set operates in the
transmit mode.
Output from the receiver detector stage.
Fixed
output regardless of AF output or AF gain.
Output from Transmitter MIC amplifier stage.
(Input for MIC gain control stage.)
FUNCTION
8 Volts DC available when transmitting.
(relay
can not be directly actuated.
Max. 5mA.)
Input for external ALC voltage.
Ground
Input Тог RTTY
keying (MARK:
HIGH level,
SPACE:
LOW level).
10.
Input for TRVA transverter control signal.
11.
Input for TRVB transverter control signal.
12.
Output reference voltage for band switching.
13.
INPUT/OUTPUT for external band switching.
14.
input for TUNE
mode.
When "ОУ is applied,
the set operates in the CW transmit mode.
15.
Input for external Noise Blanker control.
16.
Input for external control (DBC signal).
17.
NC
18.
Input for external control (RC signal).
19.
Output for external control (DV signal).
20.
Input for external control (RT signal).
21.
Input/Output Тог external control (ОВ 1).
22.
Input/Output for external control (082).
23.
Input/Output for external control (DB4).
| 24.
Input/Output for external control (DB8).
53. POWER
SOCKET
For connection
of the ІС-Р5155 DC power cord, or other
suitable power supply.
54. FUSE
HOLDER
This holds the fuse for the DC power circuit.
If the fuse is
blown, replace it with a new 20 Amp fuse after checking
the cause.
Open the fuse holder with a Phillips head screw
driver.
55. MEMORY
BACKUP
POWER
SOCKET
For connection of
a9 ~ 12V DC power supply.
For mobile
installation connection to the vehicle's battery can be made
as the current drain is low, for fixed installation use of the
|С-ВСТОА is recommended.
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