Minicom Advanced Systems CMG-DCM manual Tap # Rate Bandwidth Samples/s

Operator's guide

some channels, you should uncheck Common values before altering them.

If you are using Scream!, you can use the Control window to change the values of the STA and LTA periods, together with the Ratio, without restarting the digitizer. See the documentation for Scream! for more details.

Since it is not generally advisable to trigger from broadband data, the digitizer provides a set of standard bandpass filters to apply to the data streams before they are tested for the trigger condition. This filtering serves to maximise sensitivity within a the frequency band of interest, and filter out noise outside this band. You can select which bandpass filter to use from the Trigger filter drop-down menu. The corner frequencies of the pass band of the filter are determined by the Nyquist frequency, which is given by the sampling rate of the triggering data. The three filter options have pass bands between 10 % and 90 %, between 20 % and 90 % and between 50% and 90% of the data’s Nyquist frequency, respectively.

The possible filter configurations are shown in the following table:

Tap #	Rate	Bandwidth 1				Bandwidth 2			Bandwidth 5
	(samples/s)			(Hz)				(Hz)		(Hz)
0	200	10 – 90			20 – 90				50 – 90
1	100	5 – 45			10 – 45				25 – 45
	50	2.5	–	22.5	5	– 22.5			12.5	– 22.5
	40	2 – 18			4	– 18			10 – 18
	25	1.25 – 11.25			2.5		–	11.25	6.25	– 11.25
	20	1 – 9			2	– 9			5 – 9
2	50	2.5	–	22.5	5	– 22.5			12.5	– 22.5
	25	1.25 – 11.25			2.5		–	11.25	6.25	– 11.25
	20	1 – 9			2	– 9			5 – 9
	10	0.5	–	4.5	1	– 4.5			2.5 – 4.5
	8	0.4	–	3.6	0.8		–	3.6	2 – 3.6
	5	0.25 – 2.25			0.5		–	2.25	1.25	– 2.25
	4	0.2	–	1.8	0.4		–	1.8	1 – 1.8
	2	0.1	–	0.9	0.2		–	0.9	0.5 – 0.9
3	25	1.25 – 11.25			12.5 – 11.25				6.25	– 11.25
	10	0.5	–	4.5	1	– 4.5			2.5 – 4.5
	5	0.25 – 2.25			0.5		–	2.25	1.25	– 2.25
	4	0.2	–	1.8	0.4		–	1.8	1 – 1.8

December 2005 73