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