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7
Key Functions
Motorized potentiometers
All of the PQ‘s potentiometers are motorized to accommodate the channel link and
unit link functions. The adjustment range of the Frequency, Bandwidth and Amplitude
potentiometers is evenly dispersed throughout the 300-degree movement area,
ensuring smooth and continuous adjustments and extreme operational security.
The high resolution of each respective value (e.g. Q from 0.1-3.7, evenly distributed
over 300 degrees) allows extremely precise adjustments as well as accurate repeat-
ability.
We intentionally avoided unnecessary or confusing functions such as frequency
range switching or frequency, bandwidth or amplitude multiplicators.
Important note: The motorized potentiometers should NEVER be manually moved or
held while being controlled by the motors, e.g. in channel or unit link mode.
Amplitude
Amplitude settings are freely adjustable from -11.5 to + 11.5 dB. The lower range
between 0 and 2.5 dB offers extremely high resolution, allowing delicate adjust-
ments with maximum precision.
Frequency
Each channel provides fi ve fully parametric frequency bands covering 10 Hz to 28
kHz. Each band overlaps its neighbor by one octave and can be independently acti-
vated and deactivated.
The following frequency bands are provided:
LF (Low Frequencies): 10 Hz - 235 Hz
LMF (Low Mid Frequencies): 35 Hz - 720 Hz
MF (Mid Frequencies): 330 Hz - 7.1 kHz
HMF (High Mid Frequencies): 670 Hz - 16 kHz
HF (High Frequencies): 1.2 kHz - 28 kHz
Bandwidth
Bandwidth is adjustable between 0.1 and 3.7 Q in proportional Q mode and between
0.9 and 15 Q in constant Q mode. The extremely high maximum bandwidth in constant
Q mode enables tight, selective control in precision applications.
Illuminated keys
The PQ features illuminated keys that illuminate brightly when activated. The fi nal
software version will provide dimly lit keys (25% brightness) when deactivated for
ease and security of operation. The current software version (240H) switches illumi-
nation off when keys are deactivated.
LF, LMF, MF, HMF and HF keys
These keys activate (key lamps lit) or deactivate (lamps off) the 10 fi lter bands.
Con. Q key
This key switches the 10 fi lter bands between proportional Q mode (lamps off) and
constant Q mode (lamps off).
Please note: It is impossible to activate the “ON” for a specifi c band and the Con. Q
button simultaneously. Please always press one of these buttons after another.