Mode Selection; Frequency Span And Number Of Points; Impulse Response And Step Response - Saluki S3601 Series User Manual

It is allowable to set start and stop frequency randomly.
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It measures impulse response only since there is no DC item in transformation data.
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It can perform reflection and transmission Measure.
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It can be used for fault location.
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Low pass mode
8.6.1.2.
Very useful to measure low pass instruments that can work to direct current.
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It simulates conventional time domain reflectometer (TDR).
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Measure frequency points are related to DC item harmonic wave and DC item is obtained through point extrapolation at
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frequency domain start.
Since transformation data includes DC item, it can be used for impulse and step response Measure.
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It can locate fault and distinguish impedance types (capacity, induction) indicated by discontinuous points.
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It can perform reflection and transmission Measure.
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For the same frequency span, it has higher response resolution compared with band pass mode.
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8.6.2. Mode Selection

If the measured piece operates at band pass, band stop or high pass state, select band pass mode.
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If low end operating frequency of the measured piece can be up to direct current, i.e. frequency response falls rapidly at low
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end, select low pass mode also.

8.6.3. Frequency Span and Number of Points

Band pass mode
8.6.3.1.
Any start and stop frequency can be selected within operating frequency range of the Analyzer.
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The Analyzer utilizes all Measure data within start and stop frequency range.
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It provides impulse response only.
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Low pass mode
8.6.3.2.
It is required to obtain direct current item through several measuring point extrapolation starting from a frequency domain.
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Data points with equifrequent interval are required.
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All Measure frequency points of the Analyzer are related to start frequency harmonic wave.
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Stop frequency=start frequency x Sweep spot number, it has certain limitation for each Sweep spot number N and selection of
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start and stop frequency.

8.6.4. Impulse Response and Step Response

The Analyzer can display impulse response and step response of the measured piece, just like using impulse or step signal to
stimulate measured piece.
Impulse activation: it is a voltage waveform, of which the amplitude value changes to 1 from 0 and then changes back to 0

again, and pulse width depends on frequency span for frequency domain Measure.
Step activation: it is a voltage waveform, of which the amplitude value changes to 1 from 0 and step rise time depends on the
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highest frequency for frequency domain Measure.
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