Sony UWP-V1, Service Manual

Page: 30 / 164

2-10
UWP Series
Spectrum analyzer
MM-SMA conversion connector and
SMA-BNC conversion connector
CN301
RF-131 board
Frequency
counter
Modulation
analyzer
CN301
RF-131 board
MM-SMA conversion connector and
SMA-BNC conversion connector
RF
IN
AF
OUT
Frequency check
Connections
(For connecting the DC power supply, refer to step
“3. Connecting the DC power supply” in Section 2-1-2.)
Procedure
n
Perform the checking with the AF INPUT connector short-
circuit.
1. Set the modulation analyzer as below:
MEASUREMENT : FM
MEASUREMENT RANGE :
±
40 kHz
HPF : 4 kHz
LPF : >20 kHz
DE EMPHASIS : OFF
2. Check that the frequency counter (resolution : 0.1 Hz
setting) reading is 32.000 kHz
±
1Hz.
Frequency deviation adjustment
Connections
(For connecting the DC power supply, refer to step
“3. Connecting the DC power supply” in Section 2-1-2.)
Procedure
1. Connect the spectrum analyzer to the antenna terminal
(CN301/RF-131 board) via the MM-SMA conversion
connector and the SMA-BNC conversion connector.
2. Set the spectrum analyzer as below:
CENTER FREQUENCY (fc)
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
FREQUENCY SPAN : 200kHz (20 kHz/DIV)
RBW (resolution band width) : 3kHz
VBW (video band width)
: 1kHz
ATT : 20 dB
3. Adjust
1
RV511/RF-131 board (A side) so that level
between carrier frequency (frequency center level) on
spectrum analyzer and tone signal is within 29 dB
±
1 dB.
fc
32.000 kHz
29 ± 1 dB
20 dBm
v:10 dB/div
H:20 MHz/div