R&S ESR Series, User Manual

Page: 343 / 1126

Spectrum Measurements
R&S
®
ESR
340 User Manual 1175.7068.02 ─ 12
R&S ESR set to a small span. Only the frequency range around the harmonics will
then be measured with a small resolution bandwidth.
Measurement Results
As a result of the harmonics distortion measurement, the zero span sweeps on all
detected harmonics are shown in the diagram, separated by red display lines. This pro-
vides a very good overview of the measurement.
In addition, a result table is displayed providing the following information:
●
1st harmonic frequency
●
THD (total harmonic distortion), relative and absolute values
●
For each detected harmonic:
–
Frequency
– RBW
– Power
The results can also be queried using the remote commands:
THD:
CALCulate<n>:MARKer<m>:FUNCtion:HARMonics:DISTortion?
on page 787
List of harmonics:
CALCulate<n>:MARKer<m>:FUNCtion:HARMonics:LIST?
on page 787
Softkeys for Harmonic Distortion Measurements
Harmonic Distortion .....................................................................................................340
└ No. of Harmonics .......................................................................................... 341
└ Harmonic Sweep Time ..................................................................................341
└ Harmonic RBW Auto .....................................................................................341
└ Adjust Settings .............................................................................................. 341
Harmonic Distortion
Opens a submenu to determine the settings for harmonics measurement and activates
the harmonic distortion measurement.
With this measurement you can measure the harmonics of a signal. In addition the
THD (total harmonic distortion) is calculated in % and dB.
With span > 0 Hz, an automatic search for the first harmonic is carried out within the
set frequency range. Also the level is adjusted. In zero span, the center frequency is
unchanged.
In the upper window, the zero span sweeps on all harmonics are shown, separated by
display lines. In the lower window, the mean RMS results are displayed in numerical
values. The THD values are displayed in the marker field.
For details see Chapter 6.1.1.13, "Measuring Harmonic Distortion" , on page 337.
Remote command:
CALCulate<n>:MARKer<m>:FUNCtion:HARMonics[:STATe]
on page 789
CALCulate<n>:MARKer<m>:FUNCtion:HARMonics:DISTortion?
on page 787
CALCulate<n>:MARKer<m>:FUNCtion:HARMonics:LIST?
on page 787
Measurements