User manual

8X96 ADC and DAC User Manual Page 22 of 54
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house clock is used, make sure that the clocks are properly fed and terminated (75 Ohm)
if necessary, especially for long cable runs.
8X96 Converters are microprocessor controlled and as such are subject to static
interference. If unusual circumstances such as lightning storm cause a malfunction, try
rebooting the unit. For further questions regarding setup and features contact your
dealer or Mytek technical support.
8X96 ADC – Analog Input Alingment
Before using the 8X96ADC you need to align its analog inputs. The alignment generally
does not affect audio quality, only input sensitivity. The alignment is performed using 10
turn trimpots on the front panel. A small tweaker or screwdriver is necessary.
You have to arbitrarily decide what will be your studio "0 VU" analog/digital reference
level. It is usually between -20 and -14dB. It defines how much headroom you have left
over the normal operating "0 VU" level. You may set it at the same level as other piece of
equipment in your studio. For example Panasonic 3700 is fixed at -18dB (which is low
for most rock and roll recordings). ADAT is fixed at -15dB which is an optimal level.
1. Play a digital audio source (DAW generator, test CD etc.) set to approx. 1kHz at the
operating level you have chosen (let's say you have chosen -15dB).
2. Send the signal from the analog output to the console VU meter. If you don't have a
VU meter you can use an AC voltmeter set to measure AC RMS values. "0 VU"at + 4dB
corresponds to 1.225 Volts RMS measured between pin 2 and 3 of the output XLRs.
3.Using a tweaker or a small screwdriver adjust the analog outputs until VU meter reads
"0 VU".
4. Repeat the same for all outputs.