Icom IC-7800, Service Manual

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SOFTWARE ADJUSTMENTS–Continued
DRIVE LEVEL
Vd METER
Id METER
SWR METER
TOTAL GAIN
ADJUSTMENT ADJUSTMENT CONDITION DISPLAY OPERATION
• Connect an audio generator to [MIC]
connector and set as;
Frequency : 1.5 kHz
Level : 10 mV
• Connect an RF power meter to
[ANT1] connector.
• Connect a 100
Ω
dummy load to
[ANT2] connector.
• Push [F4 (RX)] to enter the RX
adjustment mode.
• C o n n e c t a n S S G t o [ A N T 1 ]
connector and set as;
Frequency : 14.1515 MHz
Level : 1 mV* (–47 dBm)
Modulation : OFF
• Connect an AC millivolt meter
to [SP] jack with an 8
Ω
load.
• Set an SSG as;
Frequency : 50.1515 MHz
Level : 1 mV* (–47 dBm)
• Set an SSG as;
Frequency : 14.1515 MHz
Level : 1 mV* (–47 dBm)
• Set an SSG as;
Frequency : 50.1515 MHz
Level : 1 mV* (–47 dBm)
1
1
1
2
3
1
1
2
3
4
5
6
7
8
DRIVE
Vd48V
Id 0A
Id 5A
Id 10A
SWR
Total Gain A HF PRE OFF
Total Gain A HF PRE ON
Total Gain A 50M PRE OFF
Total Gain A 50M PRE ON
Total Gain B HF PRE OFF
Total Gain B HF PRE ON
Total Gain B 50M PRE OFF
Total Gain B 50M PRE ON
Push [F-7 (SET)] to set the DRIVE level and
selects the next adjustment item.
Push [F-7 (SET)] to set the Vd meter indication
and selects the next adjustment item.
Push [F-7 (SET)] to set the 0 A meter
indication and selects the next adjustment item.
R o t a t e [ M A I N D I A L ] t o s e t
the driving current become 5 A.
Push [F-7 (SET)] to set the 5 A meter
indication and selects the next adjustment item
R o t a t e [ M A I N D I A L ] t o s e t t h e
driving current become 10 A.
Push [F-7 (SET)] to set the 10 A meter
indication and selects the next adjustment item
Push [F-7 (SET)] to set the SWR meter
indication and return to the opening screen.
R o t a t e [ M A I N D I A L ] t o s e t 3 0 d B o f
AF level difference between 1 mV and
no signal input from the SSG.
Push [F-7 (SET)] to set the HF A total gain and
selects the next adjustment item.
R o t a t e [ M A I N D I A L ] t o s e t 3 0 d B o f
AF level difference between 1 mV and
no signal input from the SSG.
Push [F-7 (SET)] to set the HF A total gain and
selects the next adjustment item.
R o t a t e [ M A I N D I A L ] t o s e t 3 0 d B o f
AF level difference between 1 mV and
no signal input from the SSG.
Push [F-7 (SET)] to set the 50 M A total gain
and selects the next adjustment item.
R o t a t e [ M A I N D I A L ] t o s e t 3 0 d B o f
AF level difference between 1 mV and
no signal input from the SSG.
Push [F-7 (SET)] to set the 50 M A total gain
and selects the next adjustment item.
R o t a t e [ M A I N D I A L ] t o s e t 3 0 d B o f
AF level difference between 1 mV and
no signal input from the SSG.
Push [F-7 (SET)] to set the HF B total gain and
selects the next adjustment item.
R o t a t e [ M A I N D I A L ] t o s e t 3 0 d B o f
AF level difference between 1 mV and
no signal input from the SSG.
Push [F-7 (SET)] to set the HF B total gain and
selects the next adjustment item.
R o t a t e [ M A I N D I A L ] t o s e t 3 0 d B o f
AF level difference between 1 mV and
no signal input from the SSG.
Push [F-7 (SET)] to set the 50 M B total gain
and selects the next adjustment item.
R o t a t e [ M A I N D I A L ] t o s e t 3 0 d B o f
AF level difference between 1 mV and
no signal input from the SSG.
Push [F-7 (SET)] to set the 50 M B total gain
and selects the next adjustment item.
*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.