Sony WRR-800A Service Manual page 27

6. AF level indicator/AF indicator check
Procedure
(1) Set the WRR-800A as follows;
Channel setting: Group 00, 6701 channel
(799.250 MHz)
VOL. control: MAX
Muting: OFF
(2) Connect the signal generator to the ANTENNA A IN
connector.
(3) Set the signal generator as follows:
Signal generator setting
FREQUENCY (Carrier frequency): 799.250 MHz
RF OUTPUT (Output level): 60 dBuV
MODULATION (Modulation frequency): 1 kHz
(4) Increase gradually DEVIATION (frequency deviation)
of the signal generator starting from ± 3 kHz, and
check that the deviation of the signal generator is
± (5.0 ± 1.2) kHz with the AF indicator as follows.
DEVIATION setting AF indicator
on signal generator
± (5.0 ± 1.2) kHz
AF level indicator (LCD):
Blinking
AF indicator (LED):
Lights in
Less than AF level indicator (LCD):
± (5.0 ± 1.2) kHz
Goes out
AF indicator (LED):
Goes out
(5) Connect the signal generator to the ANTENNA B IN
connector, and perform the procedures (3) and (4)
above.
WRR-800A
EMF
(= _53 dBm)
LCD:
AF
LCD:
AF
7. Muting level check
Procedure
(1) Set the WRR-800A as follows;
Channel setting: Group 00, 6701 channel
(799.250 MHz)
VOL. control: MAX
Muting: ON (Normal mode)
(2) Connect the signal generator to the ANTENNA A IN
connector.
(3) Set the signal generator as follows:
Signal generator setting
FREQUENCY (Carrier frequency): 799.250 MHz
RF OUTPUT (Output level): 60 dBuV
MODULATION (Modulation frequency): 1 kHz
DEVIATION (Frequency deviation): ± 5 kHz
(4) Check that RF Indicator LED lights (green) and "NO
TONE" message appears on LCD.
(5) Change the RF OUTPUT (output level) of the signal
generator as shown below.
RF OUTPUT (output level): 20 dBuV
(6) Check that RF Indicator LED goes off (green) and
"NO TONE" message disappears on LCD.
(7) Increase gradually the RF OUTPUT (output level) of
the signal generator.
Check that RF OUTPUT (output level) is 25 dBuV
± 5 dB at when RF Indicator lights (green LED) and
"NO TONE" message appears on LCD.
(8) Connect the signal generator to the ANTENNA B IN
connector, and perform the procedures (3) through (7)
above.
(9) Set the channel setting and FREQUENCY (carrier
frequency) of the signal generator as shown 1 and 2
below.
Perform the procedures (1) to (8) above, for each
channel setting (1 and 2).
1 Channel setting:
Signal generator setting:
FREQUENCY (carrier frequency); 792.250 MHz
2 Channel setting:
Signal generator setting:
FREQUENCY (carrier frequency); 805.500 MHz
EMF
(= _53 dBm)
EMF
(= _93 dBm)
EMF
Group 00, 6601 channel
(792.250 MHz)
Group 00, 6751 channel
(805.500 MHz)
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