4-4 RECEIVER ADJUSTMENTS
*This output level of the standard signal generator (SSG) is indicated as SSG’s open circuit.
RECEIVER
TOTAL GAIN
WFM
RECEIVING
NOISE
BLANKER
Muximum AF output
level
30 dB of AF level differ-
ence
4.0 V
Adjust the maximum
noise wave displayed
on the oscilloscope.
At the point where the
noise just reduces.
1
2
1
1
2
• Display freq. : 14.10000 MHz
• Mode : USB
• [RIT] : OFF
• [M4 AGC] : Fast (F AGC)
• [M3 NB] : OFF
• [P.AMP/ATT] : Preamp ON
• Connect a standard signal genera-
tor to the [ANT1] connector and set
as:
Frequency : 14.10150 MHz
Level :
0.5 μV* (–113 dBm)
Modulation : OFF
• Receiving
• [P.AMP/ATT] : Preamp OFF
• Set an SSG as:
Frequency : 14.10150 MHz
Level :
500 μV* (–53 dBm)
and OFF
Modulation : OFF
• Receiving
• Display freq. : 14.10000 MHz
• Mode : WFM
• Set an SSG as:
Frequency : 14.10000 MHz
Level :
500 μV* (–53 dBm)
Modulation : OFF
• Receiving
• Display freq. : 14.10000 MHz
• Mode : USB
• [P.AMP/ATT] : Preamp ON
• [M3 NB] : OFF
• R623 (MAIN) : Center
• Connect an SSG to the [ANT1] con-
nector and set as:
Frequency : 14.1015 MHz
Level : 18 μV* (–82 dBm)
Modulation : OFF
and apply the following signal to
the [ANT1] connector.
• Receiving
• [M3 NB] : ON
• Set an SSG as:
Level : 10 μV* (–87 dBm)
Modulation : OFF
• Receiving
L731,
L741
R741
L632
L621,
L633
R623
Connect an AC milli-
voltmeter to the [EXT
SP] jack with an 8 Ω
dummy load.
Connect an AC milli-
voltmeter to the [EXT
SP] jack with a 8 Ω
dummy load.
Connect a digital
multimeter or oscillo-
scope to check point
CP631.
Connect an oscillo-
scope to check point
CP632.
MAIN
MAIN
MAIN
MAIN
MAIN
Rear
Panel
Rear
Panel
MAIN
MAIN
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION
MEASUREMENT
VALUE
POINT
UNIT LOCATION UNIT ADJUST
To Next Page
Loading...
