Kenwood NXR-700 Service Manual page 85

Item Condition
9. Transmit 1) A: Low
VCO Lock
Voltage
2) A: High
(Check)
3) B: Low
4) B: High
10. Receive 1) A: Low
VCO Lock
Voltage
(Adjustment
2) A: High
& Check)
3) B: Low
4) B: High
11. Reference 1) Connecting SSG to REF IN
Signal and 50-load parallel.
SSG frequency: 10MHz
The switching SSG output: +0dBm (224mV)
circuit to switch
the OCXO and
2) SSG frequency: 10MHz
the internal
SSG output: +0dBm (224mV)
reference oscil-
lation
3) SSG frequency: 10MHz
SSG output: +10dBm (708mV)
4) SSG frequency: 10MHz
SSG output: –7dBm (99.9mV)
12. VCXO 1) Confi rm that there is no
OCXO and external reference
input.
13. Maximum 1) NXDN Narrow
Deviation
(NXDN)
2) NXDN Very Narrow
14. Driver Disconnect the cable from TX
Amplifi er OUT and insert a cable from
Power power meter.
After the adjustment, connect
the cable to TX OUT.
1) Low
2) Center
3) High
ADJUSTMENT
Measurement
Test-
Unit Terminal
equipment
DVM TX CV
DVM RX CV1
PC
SSG Rear REF IN
Spectrum TX REF OUT
analyzer
SSG Rear REF IN
Oscilloscope TX REF_LV
SSG Rear REF IN
Spectrum TX REF OUT
analyzer
F. counter TX REF_IN
PC
Power meter TX TX OUT
(CN802)
NXR-700
Adjustment
Unit Parts Method
Check
PC 0.9V
ADJ
Check
PC 0.9V
ADJ
Check
Check
PC 5.99MHz+0.3ppm
ADJ
PC Value: 22800
ADJ
Value: 10000
PC +20.0dBm (100mW) ±0.1dB
ADJ
Specifi cations / Remarks
1.0V or more
3.8V or less
1.0V or more
3.8V or less
±0.05V
4.2V or less
±0.05V
4.2V or less
REF OUT: +5dBm or more
The OCXO LED (orange)
lights.
REF_LV: 2.0Vp-p or more
The OCXO LED (green)
lights.
REF OUT: +10dBm or less
The OCXO LED (orange)
lights.
REF OUT: –50dBm or less
The OCXO LED goes off.
±0.15ppm
(5.99000270~
5.99000090MHz)
It takes a time from move-
ment of adjustment value to
stability.
Fixed value writing
Disconnect the cable from
TX OUT and insert a cable
from power meter.
After the adjustment, con-
nect the cable to TX OUT.
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