Kenwood NXR-700 Service Manual page 84

NXR-700
Alignment
Item Condition
1. Setting 1) Connect the DC power output to the rear panel DC terminal (13.2V).
2) Connect the front panel COM port (D-sub 9-pin connector) to the PC serial port with a cross-wied cable.
3) Activate the FPU to go to the test mode.
2. Temperature 1) Receive unit (Celsius or
Sensor Fahrenheit)
2) Transmit unit (Celsius or
Fahrenheit)
3. Driver 1) Low
Amplifi er 2) High
Power
(Pre ADJ)
4. RF Power 1) High
Down 2) Low
Detection
5. VCO Lock 1) REF Low
Voltage SSG frequency: 10MHz
–10ppm (9.9999MHz)
SSG output: 0dBm
2) REF High
SSG frequency: 10MHz
+10ppm (10.0001MHz)
SSG output: 0dBm
3) MOD Low
SSG frequency: 10MHz
–10ppm (9.9999MHz)
SSG output: 0dBm
4) MOD High
SSG frequency: 10MHz
+10ppm (10.0001MHz)
SSG output: 0dBm
6. Transmit 1) A: Low
VCO Lock
Voltage
(Adjustment)
2) B: Low
7. Receive 1) A: Low
VCO Lock
Voltage
(Adjustment)
Pre ADJ
2) B: Low
8. Fixation of 1) Apply the high-frequency varnish to the adjusted Transmit VCO coil (L128, L108) and cover it with a shield cover.
Oscillation 2) Apply the high-frequency varnish to the adjusted Receive VCO coil (L28, L30) and cover it with a shield cover.
Coil
84
ADJUSTMENT
Measurement
Test-
Unit Terminal
equipment
Ther- Room
mometer tempera-
ture
SSG TX REF IN
DVM REF CV
(CN401)
REF IN
MB_CV1
(CN303)
DVM TX CV
DVM RX CV1
Adjustment
Unit Parts Method
RX PC Measuring room
ADJ temperature, write
the value with PC.
TX
PC Value: 1
ADJ
PC Value: 1
ADJ
Check
TX L128 Adjust the interval of
the L128.
1.5V
L108 Adjust the interval of
the L108.
1.5V
RX L28 Adjust the interval of
the L28.
1.3V
L30 Adjust the interval of
the L30.
1.3V
Specifi cations / Remarks
Fixed value writing
Fixed value writing
0.9V or more
2.5V or less
1.5V or more
3.5V or less
±0.05V
±0.05V
±0.05V
±0.05V