Kenwood NEXEDGE NXR-700, Руководство по обслуживанию

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NXR-700
85
ADJUSTMENT
Item Condition
Measurement Adjustment
Specifi cations / Remarks
Test-
equipment
Unit Terminal Unit Parts Method
9. Transmit
VCO Lock
Voltage
(Check) 1) A: Low DVM TX CV Check 1.0V or more
2) A: High 3.8V or less
3) B: Low 1.0V or more
4) B: High 3.8V or less
10. Receive
VCO Lock
Voltage
(Adjustment
& Check) 1) A: Low DVM
PC RX CV1 PC
ADJ 0.9V ±0.05V
2) A: High Check 4.2V or less
3) B: Low PC
ADJ 0.9V ±0.05V
4) B: High Check 4.2V or less
11. Reference
Signal
The switching
circuit to switch
the OCXO and
the internal
reference oscil-
lation
1) Connecting SSG to REF IN
and 50

-load parallel.
SSG frequency: 10MHz
SSG output: +0dBm (224mV)
SSG
Spectrum
analyzer Rear
TX REF IN
REF OUT Check REF OUT: +5dBm or more
The OCXO LED (orange)
lights.
2) SSG frequency: 10MHz
SSG output: +0dBm (224mV) SSG
Oscilloscope Rear
TX REF IN
REF_LV REF_LV: 2.0Vp-p or more
The OCXO LED (green)
lights.
3) SSG frequency: 10MHz
SSG output: +10dBm (708mV) SSG
Spectrum
analyzer Rear
TX REF IN
REF OUT REF OUT: +10dBm or less
The OCXO LED (orange)
lights.
4) SSG frequency: 10MHz
SSG output: –7dBm (99.9mV) REF OUT: –50dBm or less
The OCXO LED goes off.
12. VCXO 1) Confi rm that there is no
OCXO and external reference
input. F. counter
PC TX REF_IN PC
ADJ 5.99MHz+0.3ppm ±0.15ppm
(5.99000270~
5.99000090MHz)
It takes a time from move-
ment of adjustment value to
stability.
13. Maximum
Deviation
(NXDN) 1) NXDN Narrow PC
ADJ Value: 22800 Fixed value writing
2) NXDN Very Narrow Value: 10000
14. Driver
Amplifi er
Power Disconnect the cable from TX
OUT and insert a cable from
power meter.
After the adjustment, connect
the cable to TX OUT.
1) Low
2) Center
3) High Power meter TX TX OUT
(CN802) PC
ADJ +20.0dBm (100mW) ±0.1dB
Disconnect the cable from
TX OUT and insert a cable
from power meter.
After the adjustment, con-
nect the cable to TX OUT.