Sony WRR-855B, Service Manual, Page: 34 / 84

3-18
WRR-855B
. CE21 model
1
Channel setting:
Group 00, 23-63 channel (493.875 MHz)
Signal generator setting:
FREQUENCY: 493.875 MHz
2
Channel setting:
Group 00, 21-01 channel (470.125 MHz)
Signal generator setting:
FREQUENCY: 470.125MHz
.
CE33 model
1
Channel setting:
Group 00, 35-63 channel (589.875 MHz)
Signal generator setting:
FREQUENCY: 589.875 MHz
2
Channel setting:
Group 00, 33-01 channel (566.125 MHz)
Signal generator setting:
FREQUENCY: 566.125 MHz
. CE62 model
1
Channel setting:
Group 00, 64-63 channel (821.875 MHz)
Signal generator setting:
FREQUENCY: 821.875 MHz
2
Channel setting:
Group 00, 62-01 channel (798.125 MHz)
Signal generator setting:
FREQUENCY: 798.125 MHz
.
CE67 model
1
Channel setting:
Group 00, 69-64 channel (862.000 MHz)
Signal generator setting:
FREQUENCY: 862.000 MHz
2
Channel setting:
Group 00, 67-01 channel (838.125 MHz)
Signal generator setting:
FREQUENCY: 838.125 MHz
4. Distortion Ratio Check
Step 1: Switch and control setting
Channel setting:
CE21 model; Group 00, 22-32 channel (482.000 MHz)
CE33 model; Group 00, 34-32 channel (578.000 MHz)
CE62 model; Group 00, 63-32 channel (810.000 MHz)
CE67 model; Group 00, 68-32 channel (850.000 MHz)
U14 model;
Group 00, 16-01 channel (482.125 MHz)
U30 model; Group 00, 32-01 channel (578.125 MHz)
U42 model; Group 00, 44-01 channel (650.125 MHz)
U62 model; Group 00, 64-01 channel (770.125 MHz)
U66 model; Group 00, 68-01 channel (794.125 MHz)
MUTING: OFF
Step2: Checking
(1) Connect the audio analyzer to the AF OUT (power
supply/AF OUT connector) of the D-sub 15 pin
connector via the MIC amp.
(2) Set the signal generator as follows:
Signal generator setting
FREQUENCY (Carrier frequency):
CE21 model; 482.000 MHz
CE33 model; 578.000 MHz
CE62 model; 810.000 MHz
CE67 model; 850.000 MHz
U14 model; 482.125 MHz
U30 model; 578.125 MHz
U42 model; 650.125 MHz
U62 model; 770.125 MHz
U66 model; 794.125 MHz
RF OUTPUT (Output level) : 60 dB
µ
V
EMF
( = _ 53 dBm)
MODULATION (Modulation frequency): 1 kHz
DEVIATION (Frequency deviation):
±
40 kHz
(3) Set the audio analyzer to the distortion meter mode,
and check that the distortion is less than 0.8 %.
(4) Change the MODULATION (modulation frequency)
of the signal as shown below.
MODULATION: 10 kHz
(10 kHz modulation frequency must be set by using
the function generator.)
Check that the distortion ratio is less than 3 %.
(5) Connect the signal generator to the ANT IN B connec-
tor, and perform the procedures ( 2 ) through ( 4 ) above.
(6) Set the channel and FREQUENCY (carrier frequency)
of the signal generator as shown
1
and
2
below.
Perform the procedures (1) through (7) above, for each
channel setting (
1
and
2
).