Operating instructions

34
D/A Using External BNC Word Clock
In this configuration, D/A conversion is accomplished while the 2192 is synchronized to one of
the two independent BNC Word Clock inputs.
To perform D/A conversion while synchronized to Word Clock:
1. Connect the 2192 analog outputs to the analog inputs of the destination device (mixer,
recorder, etc).
2. Connect the digital output of the external digital audio source device to the desired 2192
digital input using an appropriate digital cable.
3. Connect the Word Clock output of the external master clock source to the 2192 Word Clock
input 1 (or Word Clock input 2) using an appropriate digital BNC cable.
4. Set the 2192 Clock knob to Word 1 (or Word 2).
5. Set the 2192 Sample Rate knob to the appropriate range to match the digital audio source
sample rate. The selected clock rate is now available on the BNC Word Clock outputs for
synchronizing external devices.
6. Set the 2192 Analog Outputs knob to specify the digital input that the digital audio source
signal is connected to (AES/SPDIF or ADAT). If the Analog Outputs Source Select knob is set to
AES/SPDIF, use the AES/SPDIF switch to specify AES/EBU or S/PDIF.
7. Set the external word clock device to transmit word clock. It can be set to transmit a multiple or
submultiple of the sample rate if necessary. For example, a 48kHz clock can be used with
96kHz digital audio and vice versa.
8. Set the digital audio source device to transmit digital audio.
9. Set the digital audio source device to synchronize to either the external clock master, or to the
clock output of the 2192. If the digital audio sample rate is a multiple/submultiple of the
external clock rate, use the clock outputs from 2192 for the digital audio source device.
D/A conversion is performed only when the 2192 is locked (the word clock must be running) and
digital audio is present at the digital input. The Locked lamp glows green when the 2192 is
successfully synchronized to an external clock source.