Fernsteuerbefehle
R&S
®
RTB2000
358Bedienhandbuch 1333.1611.03 ─ 05
SPECtrum:FREQuency:WINDow:TYPE
Window functions are multiplied with the input values and thus can improve the spect-
rum analysis display.
Parameter:
<WindowFunction> RECTangular | HAMMing | HANNing | BLACkmanharris |
FLATtop
RECTangular
The rectangular window has high frequency accuracy with thin
spectral lines, but with increased noise. Use this function prefer-
ably with pulse response tests where start and end values are
zero.
HAMMing
The Hamming window has higher noise level inside the spect-
rum than Hann 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 noise level within the spectrum is reduced and the width of
the spectral lines enlarges. Use this window to measure amplitu-
des of a periodical signal precisely.
BLACkmanharris
In the Blackman window the amplitudes can be measured very
precisely. However, determining the frequency is more difficult.
Use this window to measure amplitudes of a periodical signal
precisely.
FLATtop
The flat top window has low amplitude measurement errors but
a poor frequency resolution. Use this window for accurate sin-
gle-tone measurements and for measurement of amplitudes of
sinusoidal frequency components.
SPECtrum:FREQuency:MAGNitude:SCALe <MagnitudeScale>
Defines the scaling unit of the y-axis.
Parameter:
<MagnitudeScale> LINear | DBM | DBV
LINear
Linear scaling, displays the RMS value of the voltage.
DBM
Logarithmic scaling, related to 1 mW.
DBV
Logarithmic scaling, related to 1 V
eff
.
Anwendungen
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