3-14
WRR-801A
WRU-801A
7. Muting level check
Procedure
Step 1:
Tuner
[1]
(Tuner unit 1) checking
(1) Set the WRR-801A as follows;
Front panel (Tuner
[1]
)
Channel setting: Group 00, 6901 channel
(800.125 MHz)
Muting:
ON (Normal mode)
Rear panel
ATT (ANTENNA A, B) switch: 0 dB
(2) Connect the signal generator to the ANTENNA A IN
connector with DC cut fixture.
(3) Set the signal generator as follows:
Signal generator setting
FREQUENCY (Carrier frequency): 800.125 MHz
RF OUTPUT (Output level): 60 dB
u
V
EMF
(=
_
53 dBm)
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 (Tuner
[1]
).
(5) Change the RF OUTPUT (output level) of the signal
generator as shown below.
RF OUTPUT (output level): 20 dB
u
V
EMF
(=
_
93 dBm)
(6) Check that RF Indicator LED goes off (green) and
“NO TONE” message disappears on LCD (Tuner
[1]
).
(7) Increase gradually the RF OUTPUT (output level) of
the signal generator. Check that RF OUTPUT (output
level) is 25 dB
u
V
EMF
±
5 dB at when RF Indicator
lights (green LED) and “NO TONE” message appears
on LCD (Tuner
[1]
).
(8) Connect the signal generator to the ANTENNA B IN
connector with DC cut fixture, and perform the
procedures (3) through (7) above.
(9) Set the channel setting (Tuner
[1]
) 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 (Tuner
[1]
):
Group 00, 6801 channel
(794.125 MHz)
Signal generator setting:
FREQUENCY (carrier frequency); 794.125 MHz
2
Channel setting (Tuner
[1]
):
Group 00, 6947 channel
(805.875 MHz)
Signal generator setting:
FREQUENCY (carrier frequency); 805.875 MHz
Step 2:
Tuner
[2]
to Tuner
[6]
checking
When the TUNER UNIT WRU-801A is installed in the
Tuner
[2]
(Tuner unit 2) to Tuner
[6]
(Tuner unit 6) of the
WRR-801A, perform the adjustments from procedures (1)
to (4) of “Step 1. Tuner
[1]
(Tuner unit 1) checking” on
the respective tuner units that are installed in the WRR-
801A.
When performing the above described checking change the
following details as shown below, of the “Step 1. Tuner
[1]
(Tuner unit 1) checking”.
Tuner
[1]
→
Tuner
[2]
,
[3]
,
[4]
,
[5]
, and
[6]
