Icom IC-7800 Service Manual Addendum page 398

SOFTWARE ADJUSTMENTS–Continued
ADJUSTMENT ADJUSTMENT CONDITION
DRIVE LEVEL • Connect an audio generator to
1
[MIC] connector and set as;
Frequency
Vd METER
1
Level
• Connect an RF power meter to
Id METER
1
[ANT1] connector.
• Connect a 100 Ω dummy load to
[ANT2] connector.
2
3
SWR METER
1
TOTAL GAIN • Push [F4 (RX)] to enter the RX
1
adjustment mode.
• Connect an SSG to [ANT1] connec-
tor and set as;
Frequency
Level
2
Modulation
• Connect an AC millivolt meter to
[SP] jack with an 8 Ω load.
• Set an SSG as;
3
Frequency
Level
4
• Set an SSG as;
5
Frequency
Level
6
• Set an SSG as;
7
Frequency
Level
8
*This output level of a standard signal generator (SSG) is indicated as SSG's open circuit.
: 1.5 kHz
: 10 mV
Total Gain A HF PRE OFF
: 14.1515 MHz
: 1 mV* (–47 dBm)
Total Gain A HF PRE ON
: OFF
Total Gain A 50M PRE OFF
: 50.1515 MHz
: 1 mV* (–47 dBm)
Total Gain A 50M PRE ON
Total Gain B HF PRE OFF
: 14.1515 MHz
: 1 mV* (–47 dBm)
Total Gain B HF PRE ON
Total Gain B 50M PRE OFF
: 50.1515 MHz
: 1 mV* (–47 dBm)
Total Gain B 50M PRE ON
4 - 25
DISPLAY
Push [F-7 (SET)] to set the DRIVE level and
DRIVE
selects the next adjustment item.
Vd48V
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
Id 0A
and selects the next adjustment item.
Id 5A 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
Id 10A
become 10 A.
Push [F-7 (SET)] to set the 10 A meter indica-
tion and selects the next adjustment item
SWR
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.
OPERATION