Tube Tech CL 2A Dual Opto Compressor - Manual (Page 6)

LYDKRAFT ApS
Mose Allé 20, DK 2610 Rødovre
Denmark
6
ADJUSTMENT OF THE VU METER READING "COMPRESSION":
1) Turn the THRESHOLD-control fully counter-clockwise.
2) Switch the METER-selector to Compression.
3) Set the RATIO-control at 1,5:1
4) Apply a signal of 1 kHz, 0,0 dBU into the input of the compressor.
5) Adjust the GAIN-control to an output-reading of 0,0 dBU.
6) Adjust P 8 until the meter is reading 0 VU.
7) Apply a DC-voltage of +250,0 mV into the sidechain jack socket and observe that the
output level has dropped to -10,0 dBU. If this is not the case, adjust the compression
tracking (see above)
8 Adjust P 7 (-10VU) until the meter is reading -10,0 VU.
9) Remove the DC-voltage from the sidechain jack socket.
10) Repeat step 6 - 9.
NB: The VU-meter accuracy should be within +/- 1 dB when reading compression.
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