Sony UWP-V1 Service Manual page 42

Frequency deviation adjustment
Connections
(For connecting the DC power supply, refer to step
"3. Connecting the DC power supply" in Section 2-2-2.)
MM-SMA conversion connector and
SMA-BNC conversion connector
CN101
MB-1137 board (B side)
Procedure
1. Connect the spectrum analyzer to the antenna terminal
(CN101) 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
; 746.125 MHz ± 1 kHz
KR model
REFERENCE LEVEL
FREQUENCY SPAN
RBW (resolution band width) : 3kHz
VBW (video band width)
ATT
3. Adjust 1RV103/MB-1137 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
2-22
Spectrum analyzer
: 20 dBm
: 200kHz (20 kHz/DIV)
: 1kHz
: 20 dB
20 dBm
29±1 dB
v:10 dB/div
H:20 MHz/div
Frequency check
Connections
(For connecting the DC power supply, refer to step
"3. Connecting the DC power supply" in Section 2-2-2.)
MB-1137 board (B side)
RF IN
MM-SMA conversion connector and
SMA-BNC conversion connector
CN101
Procedure
n
Perform the checking with the MIC INPUT connector short-
circuit.
1. Set the modulation analyzer as below:
MEASUREMENT
MEASUREMENT RANGE : ± 40 kHz
HPF
LPF
DE EMPHASIS
2. Check that the frequency counter (resolution : 0.1 Hz
setting) reading is 32.000 kHz ± 1Hz.
Modulation Frequency
analyzer counter
AF UOT
: FM
: 4 kHz
: >20 kHz
: OFF
UWP Series