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7.1 COMPELLOR Compression Test
7.1.1 Initial Set-up
1.
Set Silence Gate THRESHOLD to full CCW position.
2.
Turn all other knobs to full CW positions.
3.
Set COMPELLOR 1N/OUT switch to IN.
4.
On Model 300, verify STEREO ENHANCE is "OFF."
5.
Choose a test oscillator frequency equal to 400 Hz.
6.
Select GAIN REDUCTION on METER SELECT switches.
7.
Make sure I/O is normalized to +4 dBm.
8.
On Model 303, verify AURAL EXCITER is OUT.
7.1.2 Test Procedure (All Models)
Step
Operation
1.
Oscillator output = +6 dBm.
2.
Drop oscillator 10 dB to
-4 dBm.
3.
Drop oscillator 10 dB to
-14 dBm.
4.
For Model 300, set STEREO
ENHANCE to ON.
Indications
A. Full scale green LED's
B. Output level =+ 17.4 dBm + 1dB
A. 6 green LED's lit
B. Output level = + 14 dBm + 1dB
A. 3 green LED's lit
B. Output level = +9 dBm + 1dB
A. Output level increases 0.4 dB.
B. Both channels increase same
amount + 0.25 dB.
7.2 COMPELLOR Leveling Test
7.2.1 Initial Set-up
1.
Set Silence Gate THRESHOLD and PROCESS BALANCE to full CCW
position.
2.
Set DRIVE to 3 o'clock position. On Model 300, set Left DRIVE to 3
o'clock position and Right DRIVE to full CCW position.
3.
Turn all other knobs to full CW positions.
4.
On Model 300, verify STEREO ENHANCE is "OFF."
5.
Set COMPELLORIN/OUT switch to IN.
6.
Choose a test oscillator frequency equal to 400 Hz.
7.
Select GAIN REDUCTION on METER SELECT switches.
8.
Make sure I/O is normalized to +4 dBm.
9.
On Model 303, verify AURAL EXCITER is OUT.
7-2 Test & Troubleshooting Procedures
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