Operating instructions

36
D/A Using AES/SPDIF Clock with ADAT Audio
In this configuration, D/A conversion is accomplished on an ADAT digital audio signal while the
2192 is synchronized to the clock of an AES/EBU or S/PDIF signal. The audio portion (if any) of
the external AES/SPDIF signal used as the clock source is ignored.
To perform ADAT D/A while synchronized to AES or SPDIF clock:
1. Connect the 2192 analog outputs to the analog inputs of the destination device (mixer,
recorder, etc).
2. Connect the optical output of the external ADAT digital audio source device to the 2192
ADAT input using an appropriate optical cable.
3. Connect the digital output of the external AES/SPDIF device that contains the digital clock
signal to the desired 2192 digital input using an appropriate digital cable.
4. Set the 2192 Clock knob to AES/SPDIF. Use the AES/SPDIF switch to specify AES/EBU or
S/PDIF.
5. The 2192 Sample Rate is defined by the AES/SPDIF digital input (the Sample Rate knob is
ignored). This rate is now available on the BNC Word Clock outputs for synchronizing external
devices.
6. Set the 2192 Analog Outputs knob to ADAT.
7. Set the external AES/SPDIF device to transmit digital clock.
8. Set the ADAT digital audio source device to transmit digital audio.
9. Set the ADAT audio source device to synchronize to either the external clock master, or to the
clock output of the 2192.
D/A conversion is performed only when the 2192 is locked (the external 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.