Basic Operation
R&S
®
Cable Rider ZPH
81
User Manual 1321.0950.02 ─ 07
Measuring the frequency
The trace consists of 711 measurement points (frequency points). The marker is
always positioned on one of these measurement points. The R&S Cable Rider ZPH
calculates the marker frequency from the frequency of the measurement point, the
center frequency and the frequency span that have been set. The measurement-point
resolution, and consequently the accuracy of the marker frequency readout, therefore
depend on the frequency span that has been selected.
The R&S Cable Rider ZPH has a frequency counter to increase the accuracy of the
marker-frequency readout. It completes the sweep, then counts the frequency at the
marker position.
1. Press the "Marker Function" softkey at the "Parameter view".
2. Select the "Frequency Count" from the menu item.
The measurement result of the frequency counter is displayed in the "Measurement
result view". When the frequency counter is active, the resolution of the frequency
readout is always 0.1 Hz, regardless of the span. The accuracy is determined by the
internal reference frequency which is far more exact than the pixel-oriented marker
readout.
4.7.4
Measuring Harmonics
A spectrum analyzer is ideal to measure harmonic levels or harmonic ratios, because it
can resolve different signals in the frequency domain.
With marker functions, you can speed up the measurement tasks.
A signal generator, e.g. R&S SMBV provides the signal source.
Using the Spectrum Analyzer
