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7.0 TEST PROCEDURES
The following tests are not comprehensive, but they can be used for a quick
field test of COMPELLOR operation. The tests apply to all models, except
the AURAL EXCITER Test, which is performed only on the Model 303.
NOTE...d
If you are checking the performance of the COMPELLOR circuits on the
Model 303, make sure the AURAL EXCITER is OUT.
OSCILLATOR
To properly implement the tests, refer to Fig. 7.1 and Fig. 7.2 for the proper
test set-up and a special test fixture for peak limiter testing.
TEST
FIXTURE
MONO
or
LEFT IN
COMPELLOR
MONO or
LEFT OUT
o
RIGHT IN
RIGHT OUT
(Model 300)
( Model 300)
ANALYZER
Fig. 7-1. Block diagram of
test set-up.
The listed test procedures require the use of the following test equipment:
1.
Audio Analyzer (Sound Technology 1710 or equivalent)
2.
Spectrum Analyzer (Tektronix 5LAN or equivalent)
3.
Sweep Function Generator ( B&K 3025 or equivalent)
4.
Multimeter (Fluke 77 or equivalent)
5.
Oscilloscope (minimum 10 MHz bandwidth)
HI
O
INPUT
LO
O
Fig. 7-2. Suggested test
circuit used in the Peak
Limiter test.
BYPASS
OPERATE
0—
si
—0
+10
S2
13.3 kOhms
VV\e
13.3 kOhms
Wv
S3
10 Ohms
3.32 kOhms
Si = 4PDT
S2
SPST, momentary
S3 = SPST, momentary
HI
O
OUTPUT
LO
O
Test & Troubleshooting Procedures 7-1
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