Channel Menu R&S
®
ZVA/ZVB/ZVT
1145.1084.12 4.170 E-6
Calculation of the Relative Trace
To obtain the relative trace the analyzer must measure the fundamental signal in addition to the active
harmonic. In a frequency sweep the two measurements require different sweep ranges so that the
fundamental is measured in a new channel. The relative trace is then calculated using trace
mathematics.
Assume that the active 2
nd
harmonic belongs to channel Ch1 with a sweep range between 10 MHz and
2 GHz. The relative measurement involves the following steps:
1. The analyzer creates a new channel Ch2 with maximum sweep range, e.g. for a 24
GHz analyzer:
2. The harmonic trace is measured with Ch1 settings, the fundamental trace is measured
with Ch2 settings.
3. The analyzer enables the trace mathematics and divides the harmonic trace by the
fundamental trace:
4. The harmonic trace is hidden (invisible); the relative trace is displayed as a
mathematical trace.
Remote control:
[SENSe<Ch>:]FREQuency:CONVersion:HARMonic:RELative ON
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