WCS-880
9
9
3. RX Output Level Adjustment
Setting:
Procedure:
1. Connect the 1/4
λ
sleeve antenna to a SSG, and put the an-
tenna by the lead wire antenna (ANT2).
2. Connect a 3.3 k
Ω
load to the REC OUT plug (receiver unit),
and under this condition connect to the audio analyzer.
3. Set the
[RF CHANNEL]
switch (SW1) to
[2]
.
4. Adjust RV52 on the RX BASE board so that the value of au-
dio analyzer becomes –50 dBV.
4. DISTORTION Level Adjustment
Setting:
Procedure:
1. Select CH2 of the Transmitter (WCS-880T).
2. Set the
[RF CHANNEL]
switch (SW1) on the RX BASE board
to
[2]
.
3. Connect a 3.3 k
Ω
load to the REC OUT plug (P1), then con-
nect to the input of audio analyzer.
4. Set the output of audio analyzer to 1 kHz, –36 to –40 dBV and
enter its output to the MIC of Transmitter (WCS-880T).
5. Rotating the RV51 on RX BASE board, adjust so as to mini-
mize the distortion. (Target distortion is 1.5 % or less.)
FM RF SSG
Carrier frequency: 864.2 MHz
Modulation: 1 kHz,
±
1 9 kHz deviation
Output level: – 60 dB m
audio
analyzer
REC out plug (P1)
RX BASE
board
lead wire
antenna (ANT2)
1/4
λ
sleeve
antenna
audio
analyzer
1 kHz
–36 to –40 dBV
RX BASE
board
REC
OUT plug (P1)
3.3 k
Ω
+
–
Transmitter
(WCS-880T)
MIC
Adjustment Location:
– RX BASE BOARD (Component Side) –
1
t
2
t
3
SW1
[RF CHANNEL]
CT1
CH-1
CT2
CH-2
CT3
CH-3
RX Frequency
Adjustment
RV52
RX Output Level
Adjustment
RV51
DISTORTION
Level
Adjustment
lead wire antenna (ANT2)
IC1
IC51
TP51
TP54
– RX BASE BOARD (Coductor Side) –
Foot of VCO board
shield case
MEMO
