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5-7 UX-910 ADJUSTMENTS<br />
ADJUSTMENT<br />
2ND LO LOCK<br />
VOLTAGE<br />
1ST LO LOCK<br />
VOLTAGE<br />
1<br />
1<br />
2<br />
ADJUSTMENT CONDITION<br />
• Connect an optional UX-910 (1200<br />
MHz band unit).<br />
• Display frequency: 1270.5000 MHz<br />
• Receiving<br />
• Display frequency: 1240.0000 MHz<br />
• Receiving<br />
• Display frequency: 1300.0000 MHz<br />
• Receiving<br />
ADJUSTMENT<br />
MEASUREMENT<br />
VALUE<br />
POINT<br />
UNIT LOCATION UNIT ADJUST<br />
MAIN<br />
(UX-910)<br />
MAIN<br />
(UX-910)<br />
Connect a digital<br />
multimeter or oscilloscope<br />
to check point<br />
CP701.<br />
Connect a digital<br />
multimeter or oscilloscope<br />
to check point<br />
CP501.<br />
2.6–3.8 V<br />
6.0–7.0 V<br />
3.4–4.4 V<br />
Verify<br />
Verify<br />
RECEIVER<br />
GAIN<br />
ATT GAIN<br />
IDLING<br />
POWER<br />
BALLANCE<br />
TRANSMITTER<br />
GAIN<br />
1<br />
1<br />
1<br />
1<br />
2<br />
3<br />
4<br />
1<br />
• Display frequency: 1280.0000 MHz<br />
• Connect a standard signal generator<br />
to [12 ANT] connector and set as:<br />
Frequency : 1280.0000 MHz<br />
Level<br />
Modulation: OFF<br />
• Receiving<br />
: 710 µV* (–50 dBm)<br />
• Display frequency: 1280.0000 MHz<br />
• [ATT]<br />
: ON<br />
• Set an SSG as :<br />
Frequency : 1280.0000 MHz<br />
Level : 710 µV* (–50 dBm)<br />
Modulation: OFF<br />
• Receiving<br />
• Display frequency: Any<br />
• Mode<br />
: CW<br />
• Preset R61, R67, R83 to max.<br />
clockwise, R13 to max. counter<br />
clockwise, and C332 to center.<br />
• Connect an RF power meter to [12<br />
ANT].<br />
• Connect an SSG to the check point<br />
CP311 and set as :<br />
Frequency : 10.8500 MHz<br />
Level : OFF<br />
• Transmitting<br />
• Display frequency: Any<br />
• Mode<br />
: CW<br />
• Connect an SSG to the check point<br />
CP311 and set as :<br />
Frequency : 10.8500 MHz<br />
• Transmitting<br />
• Display frequency: 1240.0000 MHz<br />
• Transmitting<br />
• Display frequency: 1300.0000 MHz<br />
• Transmitting<br />
• Display frequency: 1270.0000 MHz<br />
• Set an SSG as :<br />
Frequency : 10.8500 MHz<br />
Level : 18 mV* (–22 dBm)<br />
• Transmitting<br />
MAIN<br />
(UX-910)<br />
MAIN<br />
(UX-910)<br />
MAIN<br />
(UX-910)<br />
Rear<br />
panel<br />
Rear<br />
panel<br />
Connect a spectram<br />
analyzer to check<br />
point CP311.<br />
Connect a spectram<br />
analyzer to check<br />
point CP311.<br />
Connect a digital<br />
multimeter between<br />
check points CP321<br />
and CP322.<br />
Connect an RF<br />
power meter to [12<br />
ANT].<br />
Repeat step 2 and step 3 several times until power difference is minimum.<br />
Connect an RF<br />
power meter to [12<br />
ANT].<br />
*This output level of a standard signal generator (SSG) is indicated as SSG’s open circuit.<br />
–34 dBm (16 dB gain)<br />
–14 dBm (20 dB of gain<br />
difference between the<br />
attenuator ON and<br />
OFF.)<br />
0.5 V<br />
voltage difference<br />
5 W<br />
Read the RF power<br />
meter indication.<br />
Same power as step 2<br />
5 W<br />
MAIN<br />
(UX-910)<br />
MAIN<br />
(UX-910)<br />
MAIN<br />
(UX-910)<br />
MAIN<br />
(UX-910)<br />
MAIN<br />
(UX-910)<br />
R224<br />
R288<br />
R13<br />
Adjust<br />
SSG’s<br />
level<br />
Verify<br />
C332<br />
R83<br />
5 - 18
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