Aphex Studio Dominator 700 - Page 38

10.1.4
With
trims.
band:
VCA Balancing
NO AUDIO INPUT, balance all six sets of limiter
Perform the following procedure for each limiter
a. Check test points 301(401) to insure no gross
DC offset exists. Less than 50 millivolts is
OK.
b. Monitor test point 302(402).
c. Set DRIVE full CCW.
d. Measure the DC value on TP302(402).
e. Set DRIVE full CWo
f. Adjust VR301(401) to obtain the same voltage
on TP302(402) as in step d.
g. Quickly repeat steps c thru f to obtain
minimum shift as the DRIVE pot is turned
through the full sweep.
h. Now adjust VR302(402) to obtain zero volts
on TP302(402). The setting of the DRIVE pot
should not matter.
i. Run the DRIVE pot through a full sweep and
verify minimum shift from zero volts is
obtained.
When all six limiters are shift and offset nulled,
proceed to the next step.
10.1.5 Gain Verification
a. Feed the generator into the LEFT CHANNEL at
-lOdBrn, 1 KHz. Check that input sensitivity
is set for -10 on both channels.
b. Set PROCESS to ON.
c. Raise DRIVE to full CWo
d. Check that two to four total limiting LEDls
are on.
e. Repeat the procedure for RIGHT channel input.
10.1.6 Limiter Test
a. Raise the generator output to OdBm, RIGHT
channel feed only .
b. Observe that all the limiting LEDls are on.
c. With the RELEASE TIME pot full CW, reduce
the DRIVE control to verify nominal
releasing of gain reduction.
d. Measure the output level with 6 to 10 dB
of limiting and the OUTPUT CEILING at +6. It
should be very close to OdBm. Trim the
output trimmer for exactly OdBm output.
e. Repeat the procedure for a LEFT CHANNEL feed.
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