Balanced Audio REX II Preamplifier - Manual (Page 19)

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FIXED Gain mode
In some systems (some A/V installations, for example) it is desirable to set a
particular input to a fixed gain, that is then becomes unaffected by the volume
knob. Most often it is required to set the preamplifier gain to Unity (Gain of 1).
The REX II allows the user to do so by using its FIXED gain function.
Press the Function button six times.
The display will read: FIX OFF
Enter any desired number for the fixed gain on the selected input (see
below).
UNITY gain for the REX II preamplifier correspond to the following
volume setting:
CNTS display mode 100 Counts
DBU 00.0dB
DBM -20.0dB
Exit the programming mode by pressing and holding the Function
button.
DISPLAY MODE programming
The volume display of the REX II can be switched to work in any of the following
three modes:
CNTS: Relative volume counts with the range of 000 to 140
DBU: Decibel readings with respect to unity gain (0dB).
DBM: Decibel readings with respect to maximum gain (20dB)
NOTE: To avoid possible confusion, the SAME display mode setting
applies to ALL inputs. It is not possible, for example, to set one input
to CNTS and another to DBU.