Section Six: Using Graphi-Q2 Front Panel Controls; Front Panel Calibration; Graphic Equalizer Controls - SABINE GRAPHI-Q2 Operating Manual

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ECTION IX SING

Section Six: Using Graphi-Q2 Front Panel Controls

Many Graphi-Q2 owners will be immediately familiar with the simple operation of the front panel controls.
Operation of these controls will be very similar when using an RS-232 connection to control Graphi-Q2
functions from a Windows-based computer platform (see Section Eight).
Important Note on Equipment Power-on Sequencing and Feedback Suppression
IMPORTANT
The Graphi-Q2 is similar to a computer in that it requires several seconds to boot up and become
Equipment operative. Because of this, the potential exists for feedback to assault your system should you power
Power-on up all of your equipment (including the Graphi-Q2) in unison, with volumes set to operating levels.
Sequencing to Therefore, it is wise to consider either one of the following courses:
Avoid Feedback
1. Sequence the power up so that the Graphi-Q2 turns on well ahead of the power amp. Allow
2. Set up the Graphi-Q2 to give the signal a boost, and adjust the rest of your gain structure

6.1. FRONT PANEL CALIBRATION

Your Sabine Graphi-Q2 ships from the factory with all front panel controls precisely calibrated for
maximum accuracy. However, if you upgrade the Graphi-Q2 (GRQ3121 or GRQ3122 only) firmware,
IMPORTANT
Sabine recommends recalibrating the front panel controls. You may also want to periodically recalibrate
to assure the highest degree of front panel control precision.
Recalibrate the
Front Panel
Calibration is a simple process. Set all equalizer faders to the center detent position. Rotate the Hi
Controls after
Cut and Threshold knobs to the full clockwise position. Rotate the Lo Cut, Ratio, and Gain knobs
Upgrading
fully counterclockwise. For two channel units you must set both sets of controls.
Firmware
Hold down both the Fifth Octave and Set Fixed buttons until "Calibrating Front" appears on LED
display. (For GRQ3122 use the buttons for the B channel). Release the buttons when the LED
displays "Calibration Done."

6.2. GRAPHIC EQUALIZER CONTROLS

Please make note of the default front panel control protocols that apply when setting graphic EQ, FBX
filters, compression, delay, and output level for the two outputs of the single-input Graphi-Q2
(GRQ3121). All processing, INCLUDING delay, is applied to Output B in the factory default setting. All
processing EXCEPT delay is applied to Output A. Therefore, all graphic EQ, FBX, and compression
adjustments will apply to both outputs, while front panel delay adjustments will affect only the B output.
Remote control operation of the GRQ3121 will enable separate delay and output level control settings
for Outputs A and B. All other processing (graphic EQ, parametric EQ, and compressor/limiter settings)
can be applied to one or both outputs using software control, but the GRQ3121 will not permit unique
output settings for any processing except delay, and for the output levels.
6.2.1. Front Panel Control
The Graphi-Q2 graphic EQ sliders have a center detent, calibrated to zero boost/cut at the factory.
Raising the slider above the detent boosts a frequency band surrounding the center point nominal
TECH TIP
frequency; lowering the slider below the detent cuts the frequency band. The Graphi-Q2 comes from
the factory set to a ±12 dB boost/cut range. You may change this to a ± 6 dB range (and back again)
Changing
by pressing and holding the delay up/down buttons simultaneously for approximately one
Boost/Cut
second. An LED in the lower right section of the front panel will indicate the 6 dB range condition when
range from
it is illuminated. For two channel Graphi-Q2 units, pressing and holding either channel's delay up/down
12 dB to 6 dB
buttons will switch both channels' EQ ranges simultaneously. It is not possible to select different ranges
for the two channels.
NOTE: Pulling down the A
channel sliders causes the B
TECH TIP
channel to become the mas-
ter for both channels. This also
Linking Channel
slaves the compressor, high &
A & Channel B
low cut filters, and output gain.
Using GRQ3122
Delay, bypass, and FBX con-
Front Panel
trols remain channel specific.
12
G -Q2 C
RAPHI ONTROLS
a 5 second time differential for comfort.
accordingly. When the Graphi-Q2 is bypassed (or still booting), the signal level will be below the
feedback threshold.
All A-channel
Sliders down