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User Controls MUX-8552A User Manual (Iss. 01)
MUX-8552A-C Gain Adjustment
If necessary, use a tweaker screwdriver to adjust the fine analog audio input levels for each channel on
the AAM-8552A. See Figure 6 for potentiometer locations. The potentiometer assignments are:
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RV4 for AES1A
•
RV3 for AES1B
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RV2 for AES2A
•
RV1
for AES2B
These potentiometers provide 9dB range of adjustment on the –18dBFS jumper setting and a 6dB
range of adjustment on the –24dBFS jumper setting. Using these adjustments, the total headroom is
adjustable over the –15 to –27dBFS range.
Note All fine levels are factory set for unity gain and should not need
adjusting.
An extender card is required (EXT-8100) to adjust
potentiometer settings. Refer to the section, “
Optional
Equipment ” in this manual, for details.
LEDs
When all jumper and cabling configuration is complete, apply the SDI video input signal. The group
LEDs will indicate which groups have embedded audio.
Figure 7. Card-edge LEDs
The front card edge has LEDs that display the status of input signals. The LED displays are described
in the preceding figure and the following table: