Grace Design m906 Owner's Manual page 26

CAL mode, simply press the CAL switch again. You'll be returned to the normal operating state of the m906
and the CAL switch LED will extinguish. The lower line of the LCD reads 'USE SEL FOR DAC'

Press the SEL switch, which is located to the immediate left of the MON >
CUE switch. The switch LED will begin to flash (screenshot 14).
Ž
This mode of CAL uses the channel solo/mute switches to select the
desired DAC channel for editing. Press the switch corresponding to the
DAC channel output you'd like to modify. The switch LED will begin to
flash and 'select channel' will be displayed in the second line of the LCD
(screenshot 15).

"CAL" will be displayed in the headphone level LED display, while the
current DAC output channel level will be shown in the 'main level/edit' LED window. A value of "0.0" indicates
the default, non-edited value.

Rotate the 'main level/edit' rotary encoder in a clockwise direction to increase the value. Rotate the encoder in
a counter-clockwise motion to decrease the value. Once again, the absolute value range is -96dB to +31.5dB
The output will change in real-time.
‘
Once you're satisfied with the new DAC output level value for a given channel, you can select another channel
to adjust, select a new function to edit or exit CAL mode.
’
Exit CAL mode and return to the normal operating state by pressing the flashing CAL switch.
Adjusting Talkback Mic Preamp Gain and 48v On/Off
When you first power-up a new m906 the preamp gain will be set to +31dB and 48V will be set to 'off' .
Here's how you can change these settings:
Œ
Press the CAL switch. The switch LED flashes, which indicates you're now in CAL mode. All other switch LED's
on the remote control unit will be unlit. If you inadvertently entered CAL mode, simply press the CAL switch
again. You'll be returned to the normal operating state of the m906 and the CAL switch LED will extinguish.

Press the TALKBACK switch. Once you do this,"CAL" will be displayed in the headphone level LED display and
the 'main level/edit' LED display will show the current mic amp gain level in dB, Talkback will be engaged, and
the monitors will DIM.
Ž
To increase the mic amp gain, rotate the main level encoder in a clockwise direction. As you do this, you'll see
the gain settings change. Preamp gain is adjustable from +10 to +60dB in 3dB steps (except there is no 13dB
setting). Rotate the encoder in a counter-clockwise direction to reduce the gain level.

If you'd like to change the state of 48V phantom power, press the TALKBACK switch again.The 'main level/edit'
LED display now shows the on/off state of 48V for the preamp. Rotating the main level encoder to the right
turns 48v on and rotating to the left turns it off.
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If you want to return to the preamp gain adjust mode, simply press the TALKBACK switch again.
‘
Once you're satisfied with the new settings, you can select a new function to edit or exit CAL mode.
’
Exit CAL mode and return to the normal operating state by pressing the flashing CAL switch.
Changing the Dim Level
The default dim level, as set at the factory, is -20dB. The dB range of dim is -5 to -35dB in 5dB steps.
Changing to a new dim level is easy:
grace design m906
26
owner's manual
screenshot 14
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cal mode enter screen
screenshot 15
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fixed DAC output cal mode