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.
ALC
DRIVE HF/50M
DRIVE 144M
SWR HF/50M
SWR 144M-1
SWR 144M-2
TX RX
Total Gain
: 14.151500 MHz
: 50 µV (–73 dBm)
and OFF
: OFF
S0 Level
: OFF
S9 Level
: 50 µV (–73 dBm)
: OFF
:
S9+60 Level
: 32 mV (–17 dBm)
: OFF
5 - 11
DISPLAY
Push [F5 (
next.
chk SET
Push [F5 (
next.
chk SET
Push [F5 (
next.
chk SET
Push [F5 (
next.
chk SET
Push [F5 (
next.
chk SET
Push [F5 (
[F2] to return the opening display.
chk SET
Push [F2 (
D163E 0.70-0
adjustment.
1.40-0
Set the RX total gain to 30 dB level
difference between SSG ON and
chk SET
OFF using [MAIN DIAL]. Then push
[F5 (
to step next.
Push [F5 (
level into memory, and to step next.
chk SET
NOTE: While RX METER adjust-
ment, NEVER change the connected
SSG's level until transceiver emits
"Pi Pi" and changes indication.
Push [F5 (
level into memory, and to step next.
chk SET
Push [F5 (
level into memory, and to step next.
chk SET
OPERATION
SET
)] to set and to step
SET
)] to set and to step
SET
)] to set and to step
SET
)] to set and to step
SET
)] to set and to step
SET
)] to set, then push
RX
)] to enter the TX
SET
)] to store into memory, and
SET
)] to store the "S0"
SET
)] to store the "S9"
SET
)] to store the "S9+60"