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4-8 SCOPE UNIT ADJUSTMENTS
S3 LO LOCK
VOLTAGE
SCOPE
SCOPE GAIN
SCOPE
ATTENUATOR
ADJUSTMENT
ADJUSTMENT
ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT
LOCATION
UNIT
ADJUST
1
1
2
3
1
1
Pre-set the IC-7800 as the following
condition.
• MAIN display frequency
: 14.200 MHz
• Mode
: CW
• Dualwatch
: OFF
• Pre-amp.
: OFF
• Attenuator
: OFF
• Scope
: ON
• Scope attenuator : OFF
• Span
: ±25 kHz
• Receiving
• Connect an SSG to [ANT1]
connector and set as;
Frequency : 14.200 MHz
Level
:
500 µV* (–53 dBm)
Modulation
:
OFF
• Receiving
• Connect an SSG to J1 and set as;
Frequency : 71.715 MHz
Level
: 100 mV* (–7 dBm)
Modulation
:
OFF
• Receiving
• Connect an SSG to [ANT1]
connector and set as;
Frequency : 14.200 MHz
Level
: 500 µV* (–53 dBm)
Modulation
:
OFF
• Receiving
• MAIN display frequency
: 14.200 MHz
• Mode
: CW
• Connect an SSG to [ANT1]
connector and set as;
Frequency : 14.200 MHz
Level
: 500 µV* (–53 dBm)
Modulation
:
OFF
• Receiving
• MAIN display frequency
: 14.200 MHz
• Mode
: CW
• Scope attenuator : 30 dB
• Connect an SSG to [ANT1]
connector and set as;
Frequency : 14.200 MHz
Level
: 500 µV* (–53 dBm)
Modulation
:
OFF
• Receiving
SCOPE
Front
panel
Front
panel
Front
panel
Connect a digital
voltmeter to CP801.
Scope wave on the
LCD.
Scope wave on the
LCD.
Scope wave on the
LCD.
2.5 V
Maximum wave form
Minimum wave form
Maximum wave form
Set peak of scope
wave form to 6 scales
in the scope screen
Set peak of scope
wave form to 3 scales
in the scope screen.
SCOPE
SCOPE
SCOPE
SCOPE
C824
Adjust in
sequence
L203,
L202,
L201,
L5,
L6,
C41,
and
repeatedly
adjust L5,
L6 and
C41 in
sequence
.
C41
Adjust
L5,
L6,
repeatedly.
R416
R11
*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.