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Remote Control
R&S
®
RTM20xx
349
User Manual 1317.4726.02 ─ 01
CALCulate:MATH<m>:FFT:WINDow:TYPE
<WindowType>
Window functions are multiplied with the input values and thus can improve the FFT
display.
Suffix:
<m>
.
1..4
The numeric suffix is irrelevant.
Parameters:
<WindowType>
RECTangular | HAMMing | HANNing | BLACkmanharris
RECTangular
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 preferably with pulse response
tests where start and end values are zero.
HAMMing
The Hamming window is bell shaped. Its value is not zero at the
borders of the measuring interval. Thus, the noise level inside the
spectrum is higher than Hanning or Blackman, but smaller than
the rectangular window. The width of the spectral lines is thinner
than the other bell-shaped functions. Use this window to measure
amplitudes of a periodical signal precisely.
HANNing
The Hanning window is bell shaped. Unlike the Hamming window,
its value is zero at the borders of the measuring interval. Thus, the
noise level within the spectrum is reduced and the width of the
spectral lines enlarges. Use this window to measure amplitudes
of a periodical signal precisely.
BLACkmanharris
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 amplitudes can be measured very precisely. However, deter-
mining the frequency is more difficult. Use this window to measure
amplitudes of a periodical signal precisely.
*RST:
HANNing
CALCulate:MATH<m>:ARIThmetics
<Arithmetics>
Defines the mode for FFT calculation and display.
Suffix:
<m>
.
1..4
The numeric suffix is irrelevant.
Command Reference