MyTek Stereo 192 ADC User Manual page 5

Typical Setup
Balanced signal source
Stereo192 ADC is equipped with 2 XLR analog inputs. For best signal to
noise performance it is recommended the signal source has a typical low
impedance output with standard +4dB line level balanced signal.
Alternatively a weaker unbalanced signal source can be used as described
in subsequent paragraph.
In typical setup the ADC is running on its internal clock with the rest of
equipment synchronized to Mytek clock either through digital output
signal or wordclock. In this configuration Mytek ADC serves as a very
stable low jitter house clock which increases the integrity and robustness
of the rest of the system. Because of careful design this clock is as good or
better than dedicated studio clock generators. Unlike in lesser quality
equipment there is no sonic benefit in clocking Mytek ADC externally. In
case of such operational need refer to "Sampling frequencies and external
synchronization".
Setup for typical balanced operation includes following steps:
1. Select either of input sensitivity controls:
a. Input knob - this mode is recommended for casual use where the input
level is vaguely defined and needs to be quickly adjusted with input knob.
or:
b. Select precision 10-turn trimpots. Then perform "analog input
alignment" as described in the next chapter.
2. Setup all other connections.
3. Select desired clock source (sync), either internal or external. If
external wordclock or superclock source is required for systemic reasons,
setup its mode using the DIP switch as described in "Internal jumpers".
The wordclock source can be terminated with internal 75 Ohm resistor
inside the Mytek unit (see: "Internal jumpers"). The termination is
recommended when using long wordclock cables (above 10 ft) and when
the wordclock source is capable handling such termination. Do not
terminate if the source is not capable of high current drive or cable is
short.
4. Select sampling frequency. If wordclock/superclock is used the
sampling frequency has to correspond to external clock frequency (can be
multiple, see: "Internal jumpers")
5. Synchronize the destination either to digital input sync or to wordclock
sync, depending on system configuration. The quality of recorded signal
does not depend on how the digital destination is synchronized with
Mytek AD converter.
6. Record- adjust input level with knob or by adjusting level at the source.
Unless you are printing final CD master, we do not recommend recording
too hot. There is no sonic benefit of pushing the level up to 0dBFS. A
healthy 1-2-3 dBs headroom allows more freedom in later processing and
mixing of recorded tracks. The red peak light is triggered digitally when 1
or more samples are overload. It's not recommended to peak frequently
although occasional overloads might be acceptable.
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