Reference Monitor Meters User Handbook
9
1
REAR P
ANEL C
ONNEC
TIONS & OPER
A
TION
REAR PANEL CONNECTIONS & OPERATION
Input Gain Adjustment
For both analogue and digital sources the default input gain is zero, i.e. an input of 0dBu
results in a reading of 0dBu on the meters. However, to accommodate lower level sources it
is possible to introduce extra input gain in 6dB steps. This gain can be applied to each input
channel independently, and it is controlled by the settings of DIPSwitches 3, 4, 5 and 6 in
bank “Settings 1” (found on the rear panel of the unit), according to the following table.
Input Gain
Maximum Signal Level
(Analogue Sources)
Maximum
Signal Level
(Digital
Sources)
Audio Input 1 Audio Input 2
SW3
SW4
SW5
SW6
0dB
+18dBu
(+15dBu for German PPM
meter setting)
0dBFS
OFF
OFF
OFF
OFF
+6dB
+12dBu
(+9dBu for German PPM
meter setting)
-6dBFS
ON
OFF
ON
OFF
+12dB
+6dBu
(+3dBu for German PPM
meter setting)
-12dBFS
OFF
ON
OFF
ON
+18dB
0dBu
(-3dBu for German PPM
meter setting)
-18dBFS
ON
ON
ON
ON
Table 2 – Input Gain DIPSwitch settings
The input gain setting can be changed at any time, without the need to remove power from
the unit.
Note that the application of extra input gain reduces the maximum signal level permitted
before signal clipping occurs. When the Level Alarm LED is configured to Input Clip, this
indicator illuminates at the onset of clipping, with extended illumination indicating that the
input gain should be reduced and/or the input signal levels attenuated.
