Icom IC-7800, Service Manual Addendum

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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.
• Connect an SSG to [ANT1] connec-
tor 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.
Rotate [MAIN DIAL] to set the driving current
become 5 A.
Push [F-7 (SET)] to set the 5 A meter indication
and selects the next adjustment item
Rotate [MAIN DIAL] to set the driving current
become 10 A.
Push [F-7 (SET)] to set the 10 A meter indica-
tion and selects the next adjustment item
Push [F-7 (SET)] to set the SWR meter indica-
tion and return to the opening screen.
Rotate [MAIN DIAL] to set 30dB of AF level dif-
ference 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.
Rotate [MAIN DIAL] to set 30dB of AF level dif-
ference 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.
Rotate [MAIN DIAL] to set 30dB of AF level dif-
ference 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.
Rotate [MAIN DIAL] to set 30dB of AF level dif-
ference 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.
Rotate [MAIN DIAL] to set 30dB of AF level dif-
ference 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.
Rotate [MAIN DIAL] to set 30dB of AF level dif-
ference 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.
Rotate [MAIN DIAL] to set 30dB of AF level dif-
ference 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.
Rotate [MAIN DIAL] to set 30dB of AF level dif-
ference 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.