User manual

Remote Control
R&S
®
RTO
579User Manual 1316.0827.02 ─ 06
Various different window functions are provided in the R&S RTO to suit different input
signals. Each of the window functions has specific characteristics, including some advan-
tages and some trade-offs. These characteristics need to be considered carefully to find
the optimum solution for the measurement task.
Suffix:
<m>
.
1..4
math waveform
Parameters:
<WindowType> RECTangular | HAMMing | HANN | BLACkharris | GAUSsian |
FLATtop2 | KAISerbessel
RECTangular
The rectangular window has the best frequency resolution, but a
poor amplitude accuracy and is recommended for separating two
tones with almost equal amplitudes and a small frequency dis-
tance.
HAMMing
The Hamming window is bell shaped and has a good frequency
resolution and fair amplitude accuracy. It is recommended for fre-
quency response measurements as well as sine waves, periodic
signals and narrow-band noise
HANN
The Hann window is bell shaped and has a slightly worse fre-
quency resolution but smaller sidelobe level than the Hamming
window. The applications are the same.
BLACkharris
The Blackman window is bell shaped and has a poor frequency
resolution, but very good amplitude accuracy. It is recommended
mainly for signals with single frequencies to detect harmonics.
GAUSsian
FLATtop2
The flattop window has a poor frequency resolution, but the best
amplitude accuracy and the sharpest side lobe. It is recommended
for accurate single-tone amplitude measurements.
KAISerbessel
The Kaiser-Bessel window has a fair frequency resolution and
good amplitude accuracy, and a very high sidelobe level. It is rec-
ommended for separating two tones with differing amplitudes and
a small frequency distance.
*RST:
BLACkharris
CALCulate:MATH<m>:FFT:CFRequency <CenterFreq>
Defines the position of the displayed frequency range, which is (Center - Span/2) to
(Center + Span/2). The width of the range is defined using the CALCulate:MATH<m>:
FFT:SPAN command.
Command Reference