Sony UWP-V1, Service Manual

Page: 75 / 164

2-55
UWP Series
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 dB
u
V
EMF
(=
_
53 dBm)
MODULATION (Modulation frequency) : 1 kHz
DEVIATION (Frequency deviation)
:
±
5 kHz
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 16
Z
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.
16 Z 1/4W
carbon resisters
Stereo mini-plug with cord
(3.5mm diameter)
Shielded wire
Solder here.
Solder here.
Solder here.
(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
Signal generator
Make it as short
as possible.
Stereo mini-plug
with load resister
RF
adjusting
cable
RF adjusting
cable
GND
CN101 or CN201
MM-SMA
conversion
connector
MM-SMA
conversion
connector
Level meter
Ant-a
(CN201)
Ant-b
(CN101)
Monitor
RF-130 board
(A side)
Output
RV181 RV281