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2.) Adjustable EqualizersThe fixed insertion loss versus frequency is specified. All units will be set to meet this predetermined curve. Additionally, if the system requires
a similar but a slightly different loss curve, a certain number of adjustments will be available to change the nominal attenuation curve. The type of adjustments can be
risting or lowering the maximum attenuation value, shifting the maximum value of the response from the center of the attenuation at the band edges, upper, lower or both.
A unit can be designed to meet all these requirements for adjustment. |
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3.) Fine Grain Equalizers. This grou of devices usually combines with all the characteristics of the "Adjustable Equalizers", but has added a certain number or resonators capable of individual fine grain cancellation. By
specification the bandwidths of the resonators can be equal or different, measured at a certain insertion loss characteristic and when its peak loss is set to a specific value. A typical resonator bandwidth can be any value
between 100 MHz and 1.0 GHz measured e.g. at the 0.5 dB point, when for example its peak loss is 3 dB. The device can be equipped with as many as 20 resonators of different values. The frequency range for tunability of
the individual resonators for fine grain cancellation can be specified anywhere in the frequency range of the equalizer.
Frequency Range and Bandwidth. The current capability covers the frequency range from 1.0 GHz to over 30.0 GHz. Bandwidths were achieved, ranging from only a few percent to almost three octaves. Several examples are shown at thediagrams page. |
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