3-8
WRR-802A (U)
Equipment and Tools
.
DC power supply:
+
9 Vdc
.
Signal generator
.
Function generator
.
Audio analyzer
.
Mic amp (Noise mete) with A-weighted filter
.
Oscilloscope
.
DC current meter
1. Output level check
Procedure
(1) Set the WRR-802A as follows;
Channel setting:
U64 model; Group 00, 6501 channel (776.125 MHz)
U66 model; Group 00, 6701 channel (788.125 MHz)
U68 model; Group 00, 6901 channel (800.125 MHz)
VOL. control: MAX
Muting:
OFF
TUNER OUTPUT LEVEL switch: LINE (
_
20 dBm)
(2) Connect the audio analyzer to the TUNER OUTPUT
(XLR type) connector via MIC amp (Amplification
gain 0 dB).
(3) Connect the signal generator to the ANTENNA A IN
connector.
(4) Set the signal generator as follows:
Signal generator setting
FREQUENCY(carrier frequency)
U64 model; 776.125 MHz
U66 model; 788.125 MHz
U68 model; 800.125 MHz
RF OUTPUT (Output level): 60 dB
u
V
EMF
(=
_
53 dBm)
MODULATION (Modulation frequency): 1 kHz
DEVIATION (Frequency deviation):
±
5 kHz
(5) Check that the TUNER OUTPUT (XLR type) connec-
tor output level is
_
21 dBm
±
1.5 dB (at 600
Z
loaded).
(6) Connect the audio analyzer to the TUNER OUTPUT
(TRS type) connector via the MIC amp (Amplification
gain 0 dB).
(7) Check that the TUNER OUTPUT (TRS type) connec-
tor output level is
_
21 dBm
±
1.5 dB (at 600
Z
loaded).
(8) Connect the signal generator to the ANTENNA B IN
connector.
(9) Perform the procedures (5), (6), and (7).
Oscilloscope
MIC amp
600
Z
balance
input
DC power supply
DC IN 9 V
Signal generator
WRR-802A
TUNER OUTPUT
ANTENNA
A IN
ANTENNA
B IN
Function generator
Audio analyzer
+
9 Vdc
3-2-2. Overall Characteristics Check
Perform the overall characteristics check according to the
following procedure.
Procedure
1.
Output level check
↓
2.
S/N check
↓
3.
Frequency characteristic check
↓
4.
Distortion check
↓
5.
RF Level indicator check
↓
6.
AF Level indicator/AF indicator check
↓
7.
Muting level/RF indicator check
↓
8.
BATT indicator check
↓
9.
Tone squelch check
Connection
