Sony UWP-V1 Service Manual page 75

(9) Monitor Level Check
Equipment and Tools
. DC power supply
DC output voltage : +3.0Vdc ± 0.1 V
. Signal generator
. DC current meter
. Stereo mini-plug with load resister (Refer to "How to
make Stereo mini-plug with load resisters" on this page.)
Switch and Control Setting
Set the URX-P1 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.24 (maximum value)
Connection
Stereo mini-plug
with load resister
Signal generator
Make it as short
as possible.
RF adjusting
cable
MM-SMA
conversion
MM-SMA
connector
conversion
connector
RF-130 board
(A side)
CN101 or CN201
UWP Series
Level meter
GND
RF
adjusting
cable
Monitor
Output
Ant-b
(CN101)
RV181 RV281
Ant-a
(CN201)
Procedure
1. Connect a signal generator to the MM-SMA conver-
sion connector and to the RF adjusting cable.
2. Set the signal generator as follows.
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) : 1 kHz
DEVIATION (Frequency deviation)
3. Connect a stereo mini-plug with load resistor, to the
MONITOR terminal. Set the MONITOR LVEL to
MON. 24 (maximum value).
4. Confirm that the voltage across the load resistor is -11
dBV ± 2dB.
5. Confirm that the voltage across the load resistor is
lowered in the step of about 2 dB when the MONITOR
level is decreased step after step.
How to make Stereo mini-plug with load resisters
Equipment
. Stereo mini-plug with cable (diameter : 3.5 mm)
(Sony RK-G136 (accessory), or equivalent) : 1
. Resister, carbon 16Z 1/4W (Part No. 1-247-088-00) : 2
n
To use the cable RK-G136, cut it into an appropriate
length to use it.
Solder here.
Shielded wire
Stereo mini-plug with cord
(3.5mm diameter)
(= _53 dBm)
EMF
: ± 5 kHz
Solder here.
16Z 1/4W
carbon resisters
Solder here.
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