Viking Electronics E111 Installation Precaution, Functions, On the road use, Bandwidth Control

Installation Precaution

On the road use

The E 111/112 are sturdily constructed with an aluminum die-cast front panel that is reinforced by means of an iron plate attached to its back. To ensure that strength is maintained during their transportation from one place to another, however, you should also reinforce each unit from the back of the rack with a special support bracket. This can be accomplished by removing cord-hangers on the rear panel, and screws that hold the rear panel to chassis, and fitting the special support brackets through the holes.

Top view

Side view

Functions

Center Frequency Control

Special support bracket

The Center Frequency (fc) of each frequency band is continuously variable within a range of one octave (between 0.7fc and 1.4fc). Thus the overall frequency response may be delicately adjusted. For example, if the 1kHz center frequency control has a 12dB boost, the frequency response looks like that of curve 1. If the center frequency control is turned anticlockwise, the response will be like curve 2, while in the case of it being turned f u l l y clockwise, the frequency response will be as shown by curve 3.

Bandwidth Control

The "Q"of each filter is continuously variable from 1.5 to 8. If the bandwidth control is turned clockwise, the bandwidth is adjusted to approximately a one octave range, while in the case of it being turned fully anticlockwise, the bandwidth is adjusted to aproxi- mately a 1/6 octave range as shown in the right figure.

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