Studer SW V4.0 OnAir 1000, Operating And Service Instructions

Page: 49 / 361

OnAir 1000 Digital Mixing Console
Date printed: 23.10.03 SW V 4.0
Channel Functions 4-7
4.6 EQ/Filter Page, Microphone Input
The EQ/filter page for a microphone input channel is opened by pressing
the EQ key of a microphone input channel's fader strip. If the user has no
access permission to the EQ and filter parameters, the EQ/filter page will
not be displayed.
HPF The HPF “ON” / “OFF” touch-screen field is a high-pass filter switch. The
filter is part of the analog front end and is available on microphone input
channels only. “ON” is highlighted if the filter is active.
EQ The EQ “ON” / “OFF” touch-screen fields activate or bypass the equalizer.
If the equalizer is active (i.e. “ON”), the EQ key will be illuminated. If the
EQ is bypassed (i.e. “OFF”), the preset frequency curve is displayed on the
touch-screen nevertheless.
The four rotary encoders are the control elements for the equalizer. The
low-frequency section is a shelving-type filter with two selectable turnover
frequencies and variable boost/cut. The frequency is selected by the left-
hand “CUTOFF” touch-screen fields, the gain is set with the first (left-
most) rotary encoder. The second rotary encoder sets the frequency of the
mid-frequency section which is a peaking-type filter. The third rotary en-
coder controls the mid-frequency boost/cut. The fourth (rightmost) rotary
encoder controls the gain of the high-frequency section which again is a
shelving-type filter with two selectable turnover frequencies. The right-
hand “CUTOFF” touch-screen fields allow frequency selection of the
high-frequency shelving filter.
Note: The HF cutoff frequencies can be reduced by approx. one octave (resulting
in an increased filter effect) when activating Customer Code 0x00000002;
refer to
chapter 11.2.11 .
EQ Specs:
Filter Mode Frequency Gain range Comment
High-pass filter HPF –3 dB @ 80 Hz ON/OFF
Analog, 12 dB/oct.,
mic input ch only
EQ low-frequency Shelving 200 Hz/400 Hz
–15 dB...+15 dB,
1 dB steps
-
EQ mid-frequency Peaking
200 Hz...10 kHz,
1/6 octave steps
–15 dB...+15 dB,
1 dB steps
Q = 0.7
EQ high-frequency Shelving 5 kHz/10 kHz
–15 dB...+15 dB,
1 dB steps
see Customer
Code (
11.2.11 )