Tone Squelch Check - Sony WRR-862A Service Manual

(5) 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 ± 1.0)
kHz with the AF indicator as follows.
DEVIATION setting AF indicator of
on signal generator Tuner 1
± (5.0 ± 1.0) kHz
AF level indicator
(LCD);Lights.
Less than AF level indicator
± (5.0 ± 1.0) kHz
(LCD);Goes out.
(6) Connect the signal generator to the ANT b connector,
and perform the procedures (4) and (5) above.
Step 2. Tuner 2 Checking
(1) Set the CONTROL switch(S1601) to "2".
(2) Connect the signal generator to the ANT a connector.
(3) Set the channel setting as follows;
. Tuner 2 channel setting
Same as "1. Switch and Control Initial Setting" on
page 3-2.
n
Set the Tuner 1 to channel setting different from the
above Tuner 2 channel setting.
(4) Perform the checking from the procedures (4) to (6) in
"Step 1. Tuner 1 checking".
When performing the above described checking change
the following detail as shown below.
Tuner 1 → Tuner 2
3-16

3-2-11. Tone Squelch Check

n
Perform this adjustment/check with the case (upper) , parti-
tion and battery case installed.
(Do under the regular use condition).
Equipment and Tools Required
Same as "3-2-5. S/N Checking".
Connection
Same as "3-2-5. S/N Checking".
Switch and Control Setting
Same as "1. Switch and Control Initial Setting" on page 3-2.
Procedure
Step 1. Tuner 1 Checking
(1) Set the CONTROL switch (S1601) to "1".
(2) Set the channel setting as follows;
. Tuner 1 channel setting
Same as "1. Switch and Control Initial Setting" on
page 3-2.
n
Set the Tuner 2 to channel setting different from the
above Tuner 1 channel setting.
(3) Connect the signal generator to the ANT a connector.
(4) 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
U1416 model : 482.125 MHz
U3032 model : 578.125 MHz
U4244 model : 650.125 MHz
U6264 model : 770.125 MHz
U6668 model : 794.125 MHz
AU66 model : 799.250 MHz
RF OUTPUT (Output level) : 60 dBuV
MODULATION (Modulation frequency) :
DEVIATION (Frequency deviation) : ± 1.4 kHz
EMF
(= _53 dBm)
32.768 kHz
(32.768 kHz must be
set by connecting
Function generator)
WRR-862A/862B