3-16
WRR-801A
WRU-801A
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 (5) 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]
10. DC +9 V OUT voltage check
Equipment and Tools
.
DC voltmeter (digital multi meter)
.
Metal film resistor 91
Z
2W (Part No. 1-214-609-00)
Procedure
(1) Connect the DC voltmeter to the ANTENNA A IN/DC
9 V OUT connector with 91
Z
resistor as shown figure
below.
(2) Check that DC output voltage of ANTENNA A IN/DC
9 V OUT connector is
+
9
±
0.7 Vdc.
(3) Connect the DC voltmeter to the ANTENNA B IN/DC
9 V OUT connector with 91
Z
resistor.
(4) Check that DC output voltage of ANTENNA B IN/DC
9 V OUT connector is
+
9
±
0.7 Vdc.
+
_
DC voltmeter
91
Z
2 W
BNC connector
Shield
ANTENNA
A IN
ANTENNA
B IN
WRR-801A
9. Tone squelch 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):
32.768 kHz
(32.768 kHz must be set
by connecting Function
generator)
DEVIATION (Frequency deviation):
±
1.4 kHz
(4) Turn on and off the MODULATION (modulation
frequency) of the signal generator as follows, and the
LCD indicator (Tuner
[1]
) changes also as follows.
MODULATION ON/OFF
LCD indication of Tuner
[1]
[1]
[1]
[1]
[1]
on signal generator
ON
GP/CH indication (LCD):
“00. 69 01” appears.
OFF
GP/CH indication (LCD):
“NO TONE” appears.
(5) Connect the signal generator to the ANTENNA B IN
connector with DC cut fixture, and perform the
procedures (3) and (4) above.
