335
Set the phase scale
12.
Select the Phase tab.
13.
To select the vertical scale factor click Scale:
Degree to set the phase units to degrees. Phase is
displayed using degrees as the scale, where degrees
wrap from –180
°
to +180
°
.
Radian to set the phase units to radians. Phase is
displayed using radians as the scale, where radians
wrap from –
Π
to +
Π
.
GroupDelay to unwrap the phase spectrum and display
its derivative.
Using the Phase Controls on page 273 provides in-depth information
on setup for phase displays.
14.
To specify whether to unwrap phase in a spectral analysis
phase waveform, click Unwrap to toggle.
15.
To set the level in dB that a magnitude in the spectrum
must exceed to have its phase computed (to reduce the
effect of noise in your phase waveform), click Suppression
Threshold, and use the multipurpose knobs or pop-up
keypad to set the threshold level. If the magnitude is less
than the threshold, then its phase is set to zero (see Using
the Phase Controls on page 273 for an example).
See Using the Phase Controls on page 273 for additional
information on suppression threshold.
Set time and frequency
domain control tracking
16.
Select the Control tab.
17.
To enable changing time and frequency domain controls
for one math waveform to change the same controls for
another math waveform, click the Track Time/Freq
Domain Controls buttons to toggle them on or off.
Select the window type
18.
To select the window type, click Window Type, and
select from the list. For more information on window
types see Using Spectral Analyzer Windows on page
274.
Set the frequency domain
controls
19.
To set the frequency range over which the spectral analysis
is performed, click Freq Span, and use the multipurpose
knobs or pop-up keypad to set the frequency range. Higher
sample rates allow you to set greater frequency spans. To
set the frequency span to the maximum allowed by the
current sample rate, click Full.
20.
To set the center frequency of the spectral analysis, click
Center Freq, and use the multipurpose knobs or pop-up
keypad to set the center frequency.
Содержание TDS5000B Series
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