Copley amplifier parameter dictionary - Maccon.de
Copley amplifier parameter dictionary - Maccon.de
Copley amplifier parameter dictionary - Maccon.de
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<strong>Copley</strong> Amplifier Parameter Dictionary Filter Coefficients<br />
Word Description<br />
7 Disabled. The filter will have no effect in the system.<br />
If legal values are passed for the filter type and family, the firmware will attempt to<br />
<strong>de</strong>sign the specified filter and fill in the coefficient values itself. The firmware is<br />
capable of calculating 1 or 2 pole low pass or high pass filters. For notch and band<br />
pass filters the firmware can only calculate a two pole filter. For these filter types,<br />
bit 8 must be set.<br />
2 This word gives the cut off frequency (in Hz) for low pass and high pass filters. For notch and band<br />
pass filters this gives the first filter frequency.<br />
3 This word gives the second filter frequency (in Hz) for notch and band pass filters.<br />
4 Bit Usage<br />
0-7 Rp given in 0.1 dB units.<br />
8-15 Rs given in dB units.<br />
Rp is the pass band ripple. This <strong>parameter</strong> is only used for Chebychev and Elliptic filters.<br />
Rs is only used with elliptic filters. It <strong>de</strong>fines the stop band as Rs dB down from the peak value in<br />
the pass band.<br />
5-6 Coefficient a1. All filter coefficients are passed as 32-bit IEEE floating point numbers. The upper 32bits<br />
should be passed first.<br />
If the firmware <strong>de</strong>signs the filter then the coefficients will be filled in by the firmware and need not be<br />
passed.<br />
7-8 Coefficient a2.<br />
9-10 Coefficient b0.<br />
11-12 Coefficient b1.<br />
13-14 Coefficient b2.<br />
<strong>Copley</strong> Controls Page 67