Applications
R&S
®
RTM3000
179User Manual 1335.9090.02 ─ 09
"Blackman"
The Blackman window is bell shaped and has the steepest fall in its
wave shape of all other available functions. Its value is zero at both
borders of the measuring interval. In the Blackman window, the ampli-
tudes can be measured very precisely. However, determining the fre-
quency is more difficult.
Use this window to measure signals with single frequencies to detect
harmonics and accurate single-tone measurements.
"Flat Top"
The flat top window has low amplitude measurement errors but a
poor frequency resolution.
Use this window for accurate single-tone measurements and for mea-
surement of amplitudes of sinusoidal frequency components.
"Rectangle"
The rectangular window multiplies all points by one. The result is a
high frequency accuracy with thin spectral lines, but also with
increased noise.
Use this function for measurements of separation of two tones with
almost equal amplitudes and a small frequency distance.
Remote command:
SPECtrum:FREQuency:WINDow:TYPE on page 542
Automatic RBW
If enabled, the resolution bandwidth is set automatically. If disabled, you can adjust the
"RBW" parameter in the FFT window.
See also: "RBW" on page 177.
Waveform
Selects the waveform type to be displayed. Several types of waveforms can be dis-
played in parallel, but at least one waveform type must be selected. By default, the
"Spectrum" waveform is selected. From each waveform type, you can also create a
reference waveform for further analysis, and perform cursor measurements.
When the waveform selection is changed, statistical evaluation is restarted.
To clear the results of previous measurements used for statistical evaluation, select
"Reset".
FFT analysis
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