Page 6 of 15 Copyright © NAGRAVISION S.A. 2011 August 19, 2011
Front panel description
Headphone jack output & level adjustment (1)
The potentiometer adjusts the level of the headphone output only (not line output). The jack is a standard
6.3 mm (
1
/
4
”) type.
Input sensitivity pots and modulometers (2 & 3)
The potentiometer adjusts the input level in a range of 66 dB. The
modulometer above indicates the level:
The led’s above indicates the input level and can be preset inside the
preamp. To do this, turn off the preamplifier, remove the bottom cover and
adjust the selectors as required. Beware that new settings will be activated
only after a power off /on.
Factory default settings are: RED at -1 dBFS, YELLOW at -9 dBFS, GREEN at -30 dBFS.
Limiter activity led’s (4)
If the limiter(s) is turned on, the led’s are lighting up when the limiter activates.
Limiter selection (5 & 6)
Permits to set the limiter to “FAST” or “SLOW” reaction time or turns it “OFF”. The limiters start to activate
at a signal level of -9.5 dBFS and from the range of -8 dB to -2 dB they compress the audio by 36 dB (max
+ 36 dB for -2 dBFS).
Limiter ganging (7)
The upper position means ganged, the down position means independent. When ganged, if one channel
limiter is activated, then the other will activate automatically irrespective of its input level.
Input sensitivity selection (8 & 9)
The 2 microphone inputs can be selected to one of three different sensitivity settings, of 2.8 mV/Pa, 10
mV/Pa or 30 mV/Pa. The 2.8 mV/Pa sensitivity position goes trough a high quality Nagra input transformer
and is designed for use with dynamic microphones.
Headphone output selection (10)
Can be set to “MONO” or “STEREO”.
Phantom power selection (11 & 12)
Turns on or off, independently for each channel, the 48 V Phantom power.
RED: 0 = turns on at -1 dBFS
1 = turns on at -2 dBFS
2 = turns on at -3 dBFS
3 = turns on at -4 dBFS
4 = turns on at -6 dBFS
5 = turns on at -9 dBFS
YEL: 0 = turns on at -9 dBFS
1 = turns on at -12 dBFS
2 = turns on at -15 dBFS
3 = turns on at -18 dBFS
4 = turns on at -24 dBFS
GRE: 0 = turns on at -30 dBFS
1 = turns on at -39 dBFS
2 = turns on at -47 dBFS
