Teledyne-lecroy DFP2 - Digital Filter Package 2 Uživatelský manuál stáhnout pdf (Strana 8)

6 ISSUED: June 2013 923134 Rev A

Band-pass Filter

Band-p

ass filters are useful for emphasizing a selected

frequency band. Sample applications include radio

channel identification, broadband transmission, ADSL,

clock generators (i.e., eliminating the central frequency

and displaying harmonics only), and

telecommunications (Jitter measurement over a

selected frequency range).

Band 1: First Stop Band — DC to bottom of first

transition region; highly attenuated.

Band 2: First Transition Region — lower corner minus

width to lower corner; decreasing attenuation.

Band 3: Pass Band — signal passes unattenuated.

Band 4: Second Transition Region — upper corner to

upper corner plus width; increasing attenuation.

Band 5: Second Stop Band — signal highly attenuated.

Band-stop Filter

Band-stop filters a

re useful for eliminating a narrow

band of frequencies. Sample applications include

medical equipment, such as ECG monitors where the

dominant ripple at 50/60 Hz is rejected, leaving the low

energy biological signals intact. Digital troubleshooting:

the inherent frequency of the switched power supply is

blocked, revealing power line voltage drops and

glitches caused by the system clock generator.

Band 1: First Pass Band — DC to bottom of first

transition region; signal passes unattenuated.

Band 2: First Transition Region — lower corner minus

width to lower corner; increasing attenuation.

Band 3: Stop Band — signal is highly attenuated.

Band 4: Second Transition Region — upper corner to

upper corner plus width; decreasing attenuation.

Band 5: Second Pass Band — signal passes

unattenuated.

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 21 22

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Teledyne-lecroy DFP2 - Digital Filter Package 2 Uživatelský manuál Strana 8