Icom IC-7400, Руководство по обслуживанию, Страница: 27 / 92

5 - 11
ADJUSTMENT MODE—continued
TX
ADJUSTMENT
RX
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION
• Connect a 100
Ω
or 25
Ω
dummy
load to [ANT144M] connector.
• Connect an SSG to [ANT1] con-
nector.
•Set an SSG as:
Frequency : 14.151500 MHz
Level : 50 µV (–73 dBm)
and OFF
Modulation : OFF
• Connect an AC millivolt meter to
[EXT SP] connector with an 8
Ω
load.
• Receiving
• Set an SSG as :
Level : OFF
• Receiving
• Set an SSG as :
Level : 50 µV (–73 dBm)
Modulation
: OFF
• Receiving
• Set an SSG as :
Level : 32 mV (–17 dBm)
Modulation
: OFF
• Receiving
11
12
13
14
15
16
1
2
3
4
5
Push [F5 (
SET
)] to set and to step
next.
Push [F5 (
SET
)] to set and to step
next.
Push [F5 (
SET
)] to set and to step
next.
Push [F5 (
SET
)] to set and to step
next.
Push [F5 (
SET
)] to set and to step
next.
Push [F5 (
SET
)] to set, then push
[F2] to return the opening display.
Push [F2 (
RX
)] 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
[F5 (
SET
)] to store into memory, and
to step next.
Push [F5 (
SET
)] 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.
Push [F5 (
SET
)] to store the “S9”
level into memory, and to step next.
Push [F5 (
SET
)] to store the “S9+60”
level into memory, and to step next.
TX RX 1.40-0
chk SET
SWR 144M-1
chk SET
SWR HF/50M
chk SET
DRIVE 144M
chk SET
DRIVE HF/50M
chk SET
ALC
chk SET
SWR 144M-2
chk SET
Total Gain
D163E 0.70-0
chk SET
S0 Level
chk SET
S9 Level
chk SET
S9+60 Level
*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.