Sony UWP-V1 Service Manual page 64

3. Output Level Adjustment
Perform this adjustment when the TUNER OUTPUT levels
deviate from the specification.
Preparation
Remove the six screws securing the rear case lid of the
URX-P2 to be adjusted, and remove the rear case lid.
Equipment and Tools
. Audio analyzer (level meter, distortion meter)
. Mic amp
. Oscilloscope
. Adjuster (0.4 x 1.3 mm) : (Part No. 7-721-052-81)
. RF adjusting cable : (Part No. J-6402-390-A)
. MM-SMA conversion connector : (Part No. J-6402-490-A)
. AF output cable : (Part No. 1-792-249-11)
Connection
For connecting the DC power supply, refer to "1. Current
Consumption Check".
Audio
Oscilloscope
analyzer
Signal
Make it as short
generator
as possible.
Connect GND of all
equipment within the
shortest possible length.
RF adjusting
cable
MM-SMA
conversion
MM-SMA connector
conversion
connector
RF-130 board
(A side)
CN101 or CN201
2-44
Make it as short
as possible.
MIC
(Connect directly
amplifier
if possible)
RF
AF output
adjusting
cable
cable
Monitor
Output
Ant-b
(CN101)
RV181 RV281
Ant-a
(CN201)
Switch and Control Setting
Set the URX-P2 as follows :
Channel setting :
U30 model ; Group 03, 3201 channel (578.125 MHz)
U42 model ; Group 03, 4401 channel (650.125 MHz)
CE62 model ; Group 04, 6332 channel (810.000 MHz)
CE67 model ; Group 04, 6832 channel (850.000 MHz)
KR model ; Group 12, 6001 channel (746.125 MHz)
RF Squelch : OFF (For setting, refer to "Setting the
Squelch OFF mode" on page 2-42)
Monitor level :MON.01 (minimum value)
Procedure
Preparation
Set the signal generator as follows :
Signal generator setting
FREQUENCY (carrier frequency) :
U30 model ; 578.125 MHz
U42 model ; 650.125 MHz
CE62 model ; 810.000 MHz
CE67 model ; 850.000 MHz
KR model ; 746.125 MHz
RF OUTPUT (Output level) : 60 dBuV
MODULATION (Modulation frequency) : 100 Hz
DEVIATION (Frequency deviation)
Adjustment
1. Connect an audio analyzer to the OUTPUT connector
via the MIC amplifier (with the 0 dB gain setting).
2. Connect the signal generator to the CN201/RF-130
board with the MM-SMA conversion connector and
the RF adjusting cable.
3. Adjustment (ANTENNA A side adjustment)
Point : OUTPUT
Specification : Output level (level meter indication
level) = _46 dBm ± 0.5 dB (at 600 Z
loaded)
Adjustment : 1RV281/RF-130 board (A side)
4. Connect the signal generator to the CN101/RF-130
board with the MM-SMA conversion connector and
the RF adjusting cable.
EMF
(= _53 dBm)
: ± 10 kHz
UWP Series