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Getting Started
R&S
®
Spectrum Rider FPH
81
User Manual 1321.1011.02 ─ 11
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 Spectrum Rider cal-
culates the marker frequency from the frequency of the measurement point, the center
frequency and the frequency span that have been set. The measurement-point resolu-
tion, and consequently the accuracy of the marker frequency readout, therefore
depend on the frequency span that has been selected.
The R&S Spectrum Rider 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 at the "Measurement
result view". When the frequency counter is active, the highest resolution of the fre-
quency readout that can be achieve is 0.0001 Hz. The accuracy is determined by the
internal reference frequency which is far more exact than the pixel-oriented marker
readout.
Trying Out the Instrument
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