grace design m906
owner’s manual
15
channel digital I/O. Input channels 1-6 are monitored on this input.
y
5.1 ADAT 5.1 format input using ADAT light pipe channels 1-6
y
2ch AES3 two channel AES3 input on an XLR connector wired pin 2 hot, pin 3 cold and pin 1
ground
y
2ch AES3 two channel AES3 input on DB-25 channels 7-8
y
2ch S/PDIF two channel input on an RCA coaxial connector.
y
2ch ADAT/TOS two channel input derived from channels 7-8 of the ADAT optical input connector or left and right
channels from the TOSLINK optical input. (Out of the box, this switch selects the ADAT format as the default choice.
To change the current source selection, simply press this switch again. When this occurs, the newly selected format
will be displayed in the system LCD window.) NOTE: The two channel ADAT format source is derived from channels 7
and 8 from the ADAT input on the rear panel. It cannot be sourced from any other pair of ADAT channels.
To select a digital input, simply press the corresponding input switch (AES3 1, AES3 2, S/PDIF or TOSLINK/
ADAT ). The name of the current input will be displayed on line one of the SYSTEM LCD (screenshot 2).
Line two will display DAC status (which is still supplying signal to the FIXED DAC OUTPUTS). DAC Input
source, sample rate and s-Lock status will be displayed.
digital input select / DAC status
screenshot 2
The TOSLINK/ADAT input switch functions as a toggle between either the TOSLINK or ADAT input.
Pressing once activates the optical input that was last used. Pressing again will toggle to the other
optical input. For example, say you were monitoring a TOSLINK signal and then switched to AES3 1,
pressing the TOSLINK/ADAT switch would activate the TOSLINK input once again. To monitor the ADAT
source, simply press the TOSLINK/ADAT switch again.
NOTE: The digital ADAT input is derived from any
one of the four channel pairs of an eight channel ADAT interface. The input pair is selected in CAL mode. To
choose ADAT input pair do the following:
1. Press the CAL switch. The switch LED will begin to flash, letting you know that CAL mode is now active.
2. Press the optical input switch. The LCD display will indicate weather you are in TOSLINK or ADAT mode. If you are in
TOSLINK input mode, press the optical input switch once again to reach ADAT mode. The menu is stepped as follows:
TOSLINK INPUT OFFSET / ADAT INPUT OFFSET / ADAT SOURCE PAIR SELECT.
3. Once in ADAT INPUT OFFSET MODE, pressing the OPTICAL input switch one more time will bring up the ADAT SOURCE
PAIR SELECT menu. Simply use the main/edit rotary encoder to choose the desired input source pair.
4. Press the CAL switch to exit CAL mode and return to normal operation.
cHanGinG tHe cLock SoURce
The m906 DAC (Digital to Analog Converter) can be referenced to the embedded clock of a connected
digital source such as AES3, ADAT, S/PDIF or TOSLINK. The DAC can also be clocked by an external Word
