Sony UWP-V1, Service Manual

Page: 32 / 164

2-12
UWP Series
11. Occupied Band Width Check
Equipment and Tools
.
DC power supply
DC output voltage :
+
3.0
±
0.1Vdc
. DC ammeter
. Audio analyzer
.
Spectrum analyzer
.
MM-SMA conversion connector
(SONY Part No. J-6402-490-A)
. SMA-BNC conversion connector
(SONY Part No. J-6402-480-A)
Switch and Control Setting
Transmission channel
U30 model ; 32-01 channel (578.125 MHz)
U42 model ; 42-01 channel (650.125 MHz)
CE62 model ; Group 00, 63-32 channel (810.000 MHz)
CE67 model ; Group 00, 68-32 channel (850.000 MHz)
KR model
; 60-01 channel (746.125 MHz)
Attenuation setting : 0 dB
Accumulated time setting : “00 : 00”
n
Take note of the settings before starting the confirmation
work.
After confirmation is completed, return the settings to
the original setting before change.
Connections
For connecting the DC power supply, refer to step
“3. Connecting the DC power supply” in Section 2-1-2.
CN301
CN401
Spectrum analyzer
Audio analyzer
Oscillator
Level meter
MM-SMA conversion connector and
SMA-BNC conversion connector
AF input
connector
RF-131 board
v:10 dB/div
H:50 kHz/div
_ 23 dB
fc
REFERENCE LEVEL
band width
100 kHz or less
carrier frequency
with no input signal
Procedure
1. Set the spectrum analyzer as below:
CENTER FREQUENCY :
U30 model ; 578.125 MHz
±
1 kHz
U42 model ; 650.125 MHz
±
1 kHz
CE62 model ; 810.000 MHz
±
1 kHz
CE67 model ; 850.000 MHz
±
1 kHz
KR model ; 746.125 MHz
±
1 kHz
REFERENCE LEVEL : 20 dBm (10 dBm ;
KR model only)
FREQUENCY SPAN : 500kHz (50 kHz/DIV)
RBW (resolution band width) : 1 kHz
VBW (video band width)
: 1 kHz
ATT : 20 dB
2. Set the carrier frequency level (the center frequency lev-
el of the spectrum analyzer) to the REFERENCE LEV-
EL when no signals are input.
3. Input 1 kHz, _ 30 dBV ( _ 27.8 dBm) signal to the AF
INPUT connector (with Mic input cable) from the audio
analyzer (oscillator).
4. At this time, confirm that the bandwidth at the level
_ 23 dB lower than REFERENCE LEVEL is in
specification.
Specification : bandwidth = 100 kHz or less