*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.
5 - 4
5-4 RECEIVER ADJUSTMENTSReceiver adjustments must be performed after software adjustment (0) and (1). SUB band must be OFF when adjusting MAIN band,
or main AF volume (max.counter clockwise) and SQLvolume (max. clockwise) must be set when adjusting SUB band.
144 M
RECEIVER
PEAK/GAIN
144 M PEAK
(MAIN BAND)
144 M
TOTALGAIN
(MAIN BAND)
144 M PEAK
(SUB BAND)
144 M
TOTALGAIN
(SUB BAND)
ADJUSTMENT
ADJUSTMENT ADJUSTMENT CONDITION MEASUREMENT VALUE POINT
UNIT LOCATION UNIT ADJUST
1
2
1
2
1
2
1
2
1
2
• Display frequency: Any
• Disconnect P501 (PAunit) from J51
on the MAIN unit.
• Connect a standard signal generator
to [VHF ANT] connector and set as:
Frequency : 146.0000 MHz
Level : 7.1 mV* (–30 dBm)
Modulation: OFF
• Receiving
• Receiving
• Display frequency: 145.9800 MHz
• Mode : FM
• Connect an SSG to [VHF ANT] con-
nector and set as:
Frequency : 145.9800 MHz
Level : 3.2 µV* (–97 dBm)
Modulation:
1 kHz/±5.0 kHz Dev.
• Receiving
• Mode : USB
• Set an SSG as :
Frequency : 145.9815 MHz
Level : 0.1 µV* (–127 dBm)
Modulation:
OFF
• Receiving
• Display frequency: 145.9800 MHz
• Mode : USB
• Set an SSG as :
Frequency : 145.9815 MHz
Level : 1 mV* (–47 dBm)
Modulation:
OFF
• Receiving
• Set an SSG as :
Level : OFF
• Receiving
• Sub display freq. : 145.9800 MHz
• Mode : FM
• Connect an SSG to [VHF ANT] con-
nector and set as:
Frequency : 145.9800 MHz
Level : 3.2 µV* (–97 dBm)
Modulation:
1 kHz/±5.0 kHz Dev.
• Receiving
• Mode : USB
• Set an SSG as :
Frequency : 145.9815 MHz
Level : 0.1 µV* (–127 dBm)
Modulation:
OFF
• Receiving
• Display frequency: 145.9800 MHz
• Mode : USB
• Set an SSG as :
Frequency : 145.9815 MHz
Level : 1 mV* (–47 dBm)
Modulation:
OFF
• Receiving
• Set an SSG as :
Level : OFF
• Receiving
PA
Rear
panel
Rear
panel
Rear
panel
Rear
panel
Connect an RF volt-
meter to check point
P501 via the JIG
cable (A).
Connect an distortion
meter to [EXT SP]
connector with an
8 Ωload.
Connect an AC milli-
volt meter to [EXT
SP] connector with
an 8 Ωload.
Connect an AC milli-
volt meter to [EXT
SP] connector with
an 8 Ωload.
Connect an distortion
meter to [EXT SP]
connector with an
8 Ωload.
Connect an AC milli-
volt meter to [EXT
SP] connector with
an 8 Ωload.
Connect an AC milli-
volt meter to [EXT
SP] connector with
an 8 Ωload.
Maximum level
–14 dBm
Minimum audio distor-
tion level
Maximum noise output
level
1.0 V (0 dB)
100 mV (20 dB of AF
level difference as step
1.)
Minimum audio distor-
tion level
Maximum noise output
level
1.0 V (0 dB)
100 mV (20 dB of AF
level difference as step
1.)
PA
MAIN
Front
panel
MAIN
MAIN
Front
panel
MAIN
L521
R547
Adjust in
sequence
L51, L52
several
times.
L53, L352,
L353, L354
main [AF]
volume
R360
Adjust in
sequence
L651, L652
several
times.
L653, L851,
L852, L853
sub [AF]
volume
R857
After adjustment, connect P501 (PAunit) to J51 on the MAIN unit.