Receiver Adjustments - Icom IC-7200 Service Manual

• RECEIVER ADJUSTMENTS

DISPLAYED
ADJUSTMENT
PREPARATION
PBT DIAL CENTER 1
[TWIN PBT]
POSITION
REFERENCE 1
VOLTAGE
VD TUNING 1
(RX)
2
3
RX TOTAL GAIN 1
S-METER 1
[S0 LEVEL]
2
[S9 LEVEL]
3
[+60 LEVEL]
When the adjustment is fi nished, push [ANF] key for 1 sec. to quit adjustment mode.
DC power supply
(13.8 V/30 A)
−
⊕
Fuses
30 A
⊕
Red
−
Black
ITEM
1) Connect an SSG to the Antenna connector, and set as;
• Frequency : 14.1515000 MHz
• Modulation : None
[RX]
• Level
2) Select the adjustment main menu "RX," using [M-CH] control.
3) Push [SET] key.
1) Set [PBT1] and [PBT2] controls to the center position.
2) Push [SET] key. (Beep "Pipi!" sounds)
1) Connect a Voltmeter to the DC power cable.
[13.8 SET] 2) Verify that the measured voltage is "13.8 V."
3) Push [SET] key.
• Push [SET] key. (Beep "Pi!" sounds)
[VCT2 RX]
(After 1 sec., another beep "Pipi!" sounds)
• Push [SET] key. (Beep "Pi!" sounds)
[VCT1 RX]
(After 1 sec., another beep "Pipi!" sounds)
• Select the item "RX GAIN" with [M-CH] control.
[VCT3 RX]
(Skip this item)
NOTE: NEVER change the SSG's condition until the beep sounds.
[RX GAIN]
• Push [SET] key. (Beep "Pi!" sounds)
(After 30 sec., another beep "Pipi!" sounds)
• Select the item "S9 LEVEL" with [M-CH] control.
(Skip this item)
• Push [SET] key. (Beep "Pi!" sounds)
(After 1 sec., another beep "Pipi!" sounds)
1) Set the SSG as;
• Level
2) Push [SET] key. (Beep "Pi!" sounds)
(After 1 sec., another beep "Pipi!" sounds, then "RX" is displayed.)
TUNER GND DC 13.8V
VOLT METER
(0.1–20 V)
−
⊕
Supplied DC cable
OPERATION
: +34 dBµ (–73 dBm)
: +90 dBµ
REMOTE E X T SP
KEY SEND
ACC
• SHORT PLUG
(connect)
2-conductor 3.5(d) mm plug
STANDARD SIGNAL GENERATOR
<SETTING>
Frequency : 14.1515000 MHz
Modulation : none
4 - 8
VALUE
–
–
13.8 V
–
–
(Skip this item)
–
(Skip this item)
–
–
ALC ANT
50 ohms coaxial cable