Operating instructions

31
A/D Using External Clock
In this configuration, the 2192 is synchronized (slaved) to an external master digital source clock.
Two separate word clock inputs as well as AES/EBU, S/PDIF, and ADAT S-MUX can be used as
clock sources for external synchronization.
In this mode, A/D conversion is accomplished at any available 2192 sample rate even if the
external clock is running at a multiple or submultiple of the 2192 sample rate.
To perform A/D conversion using external clock:
1. Connect the analog source signals to the 2192 line inputs.
2. Connect the 2192 digital output(s) to the external device digital input(s) that will receive the
digitized audio signal using an appropriate digital cable(s).
3. Connect the master clock source from the external device to the 2192 digital audio or BNC
clock input that will receive the clock signal using an appropriate digital cable.
4. Set the 2192 Clock knob to specify the digital input that the external clock is connected to. If
the Clock knob is set to AES/SPDIF, use the AES/SPDIF switch to specify AES/EBU or S/PDIF.
5. Set the 2192 Sample Rate knob to the desired frequency. See page 25 for important
information on sample rate selection.
6. Set the 2192 Digital Outputs knob to ADC.
7. Set the external digital device that is the destination for the digitized audio to receive the
digital audio input signal.
8. Set the external master clock device to transmit digital clock.
A/D conversion is performed only when the 2192 is locked (the external clock must be running).
The Locked lamp glows green when the 2192 is successfully synchronized to an external clock
source.