Icom IC-7400 Service Manual page 27

ADJUSTMENT MODE—continued
ADJUSTMENT ADJUSTMENT CONDITION
TX
11
ADJUSTMENT
12
13
14
15
• Connect a 100 Ω or 25 Ω dummy
16
load to [ANT144M] connector.
RX • Connect an SSG to [ANT1] con-
1
ADJUSTMENT nector.
•Set an SSG as:
2
Frequency
Level
Modulation
• Connect an AC millivolt meter to
[EXT SP] connector with an 8 Ω
load.
• Receiving
• Set an SSG as :
3
Level
• Receiving
• Set an SSG as :
4
Level
Modulation
• Receiving
• Set an SSG as
5
Level
Modulation
• Receiving
*This output level of a standard signal generator (SSG) is indicated as SSG's open circuit.
TX
: 14.151500 MHz
: 50 µV (–73 dBm)
and OFF
: OFF
: OFF
: 50 µV (–73 dBm)
: OFF
:
: 32 mV (–17 dBm)
: OFF
5 - 11
DISPLAY
ALC
chk SET
DRIVE HF/50M
chk SET
DRIVE 144M
chk SET
SWR HF/50M
chk SET
SWR 144M-1
chk SET
SWR 144M-2
chk SET
D163E 0.70-0
RX 1.40-0
Total Gain
chk SET
S0 Level
chk SET
S9 Level
chk SET
S9+60 Level
chk SET
OPERATION
SET
Push [F5 ( )] to set and to step
next.
SET
Push [F5 ( )] to set and to step
next.
SET
Push [F5 ( )] to set and to step
next.
SET
Push [F5 ( )] to set and to step
next.
SET
Push [F5 ( )] to set and to step
next.
SET
Push [F5 ( )] to set, then push
[F2] to return the opening display.
RX
Push [F2 ( )] to enter the TX
adjustment.
Set the RX total gain to 30 dB level
difference between SSG ON and
OFF using [MAIN DIAL]. Then push
SET
[F5 ( )] to store into memory, and
to step next.
SET
Push [F5 ( )] to store the "S0"
level into memory, and to step next.
NOTE: While RX METER adjust-
ment, NEVER change the connected
SSG's level until transceiver emits
"Pi Pi" and changes indication.
SET
Push [F5 ( )] to store the "S9"
level into memory, and to step next.
SET
Push [F5 ( )] to store the "S9+60"
level into memory, and to step next.