Sony UWP-V1 Service Manual page 81

4. Reference Frequency Deviation Adjustment
Equipment and Tools
. DC power supply
DC output voltage : +3.0 ± 0.1Vdc
. DC ammeter
. Audio analyzer
. Modulation analyzer
MEASUREMENT
MEASUREMENT RANGE : AUTO or ± 40 kHz
HPF
LPF
DE EMPHASIS
. Adjustor (SONY part No. 7-721-052-81)
. 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
MB-1094 board
Transmission channel
U30 model ; 32-01 channel (578.125 MHz)
U42 model ; 44-01 channel (650.125 MHz)
U6264 model ; 64-01 channel (770.125 MHz)
U6668 model ; 68-01 channel (794.125 MHz)
CE62 model ; Group 00, 63-32 channel (810.000 MHz)
CE67 model ; Group 00, 68-32 channel (850.000 MHz)
Attenuation setting
Accumulated time setting
MIC/LINE Select Switch (S1) : MIC
n
Note down the setting position before the adjustment.
After the Adjustment complete, set the original position.
Connections
(For connecting the DC power supply, refer to step
"3. Connecting the DC power supply" in Section 2-6-2.)
Modulation analyzer
RF IN
SMA-BNC conversion connector
MM-SMA conversion connector
CN101
MB-1094 board (A side)
UWP Series
: FM
: 50 Hz
: 20 kHz or 15 kHz
: 50 usec
: 0 dB
: "00 : 00"
Oscilloscope
Audio analyzer
Oscillator
SMA-BNC conversion connector
MM-SMA conversion connector
CN1
MB-1094 board
(B side)
GND
Lead wires
BNC connector
HOT
Procedure
1. Input 1 kHz, _60 dBV (_57.8 dBm) signal to the AF
INPUT connector (with Mic input cable).
(0 dBV = 1 Vrms)
2. Connect a modulation analyzer to the antenna terminal
(CN101) via the MM-SMA conversion connector and
the SMA-BNC conversion connector.
3. Turn the 1RV1 and 1RV2/MB-1094 board (A side)
fully counterclockwise.
4. Adjust 1RV101 so that the frequency deviation for the
modulation analyzer reading meets the following speci-
fication.
Specification : Frequency deviation = ± 10 kHz ± 0.1 kHz
Adjustment : 1RV101/MB-1094 board (A side)
(Refer to page 2-74 for the adjustment location.)
Level meter
Solder
2-61