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UTD2000 Series User Manual
23
Hamming
The frequency resolution of Hamming
window is slightly superior to Hanning
window.
Signal levels, before and after transient state or
short pulse, are of large difference.
Blackman
The best amplitude resolution and the worst
frequency resolution.
Mainly used for single frequency signal seeking
for higher subharmonic.
2.9 Digital Filter
Filter the frequency of specified waveband in signals by adjusting upper/lower frequency
limit.
Table 2-6 Digital Fiter Menu
Function menu Setting Description
Type Digital filter Digital filter
Source
CH1 Set CH1 as operation waveform
CH2 Set CH2 as operation waveform
Filter type
Low pass
Only when the signal frequency is lower than current upper
frequency limit can the signal pass through.
High pass
Only when the signal frequency is higer than current upper
frequency limit can the signal pass through.
Band pass
Only when the signal frequency is higher than current lower
frequency limit and lower than current upper frequency limit can
the sigal pass through.
Band stop
Only when the signal frequency is lower than current lower
frequency limit or higher than current upper frequency limit can
the sigal pass through.
Lower frequency
limit
Lower limit
Adjust lower frequency limit through multifunctional knob, for low
pass filter, lower frequency limit is invalid, the menu is hidden.
Upper frequency
limit
Upper limit
Adjust lower frequency limit through multifunctional knob, for high
pass filter, lower frequency limit is invalid, the menu is hidden.
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