Nagra NAGRA-V Operating Instructions And Reference Manual - page 10
Chapter I
7
Oct 2002
Sensitivity Selectors (6)
These two switches are used to select the desired sensitivity of the microphones
connected to the microphone inputs. The possible selections are 1 mV/hPa, 4
mV/hPa and 0.2 mV/hPa. Depending on the type of microphones used, those
switches must be set to the corresponding sensitivity. These switches are especially short to avoid
accidental modification and need to be operated with a small screwdriver or pen.
Rotary Lock (7)
Used to lock the two mike pots mechanically together. When the button is in the horizontal
position " " then the two potentiometers are mechanically locked together irrespective of
their individual positions. In the vertical position "
" the potentiometers are totally
independent. In order for the button to be moved to the horizontal position it must be slightly
depressed.
LFA / Speech / Flat (8)
This is the filter selection switch. The filters available are the same as those on other
NAGRA models and act on both the microphone and Line Inputs. The corresponding
curves for the filters are shown:
FLAT filter response curve
(Measurement at AES bus output)
LFA filter curve
(Measurement at AES bus output)
Speech filter curve
(Measurement
at AES bus output)
-30
+5
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+5
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Hz