8Harmonic Measurement - Rohde & Schwarz R&S FSP Series Operating Manual

R&S FSP
TOI MKR CALC The TOI measurement is based on positioning the markers 3 and 4 onto the position
SRCH of the calculated intermodulation products. The accuracy of these frequency calcula-
tions depend on the precision of the two carrier frequencies found with peak search.
The softkey TOI MKR CALC SRCH allows to switch between the calculated marker
position (CALC) and perfoming a local peak search near the expected frequencies
(SRCH) instead of the faster position calculation.
By default, the faster CALC method is used.
Remote command:
4.5.13.8 Harmonic Measurement
HARMONIC
HARMONIC (ON OFF)
DISTOR
NO. OF HARMONICS
HARMONIC SWEEPTIME
HARMONIC RBW AUTO
ADJUST SETTINGS
The HARMONIC DISTOR softkey opens this submenu and activates the harmonic
distortion measurement.
In the upper screen the zero span sweeps on all harmonics are shown, separated by
a grid line. This allows a very good overview about the measurement. In the lower
screen the mean RMS results are displayed in numerical values and the THD values
can be seen in the marker info field.
The resolution bandwidth will be automatically adjusted: RBW
RBW is not available the next higher value is used.
The results can be obtained via the following remote commands:
Trace read out via the normal trace subsystem. The first harmonic frequency can be
read out via the center frequency command.
THD value comma separated in % and dB:
Remote command:
Comma separated list of harmonic levels, for each harmonic one value:
Remote command:
HARMONIC The HARMONIC (ON OFF) softkey activates the harmonic distortion measurement.
(ON OFF) With this measurement it is possible to measure easily the harmonics e.g. from a
VCO. In addition the THD (total harmonic distortion) is calculated in % and dB.
There are 2 possible modes within the harmonic measurement. When entering the
harmonic measurement from a frequency sweep (span > 0 Hz) an automatic search
for the first harmonic is carried out within that given frequency range. Also a level
adjust will be carried out. Is the zero span mode active before entering the harmonic
measurement, the center frequency is unchanged.
Remote command:
The results can be obtained via the following remote commands:
4.120
CALC:MARK:FUNC:TOI:MARK CALC
CALC:MARK:FUNC:HARM:DIST? TOT
CALC:MARK:FUNC:HARM:LIST?
CALC:MARK:FUNC:HARM:STAT ON | OFF
Operating Manual 1164.4556.12 - 06
Instrument Functions
Analyzer Mode
= RBW * n, if that
n 1