Spectrum Measurements
R&S
®
ESR
334
User Manual 1175.7068.02 ─ 12
Figure 6-12: Intermodulation-free dynamic range of the R&S
ESR as a function of level at the input
mixer and of the selected resolution bandwidth
(Useful signal offset = 10 to 100 kHz, DANL = -145 dBm/Hz, TOI = 15 dBm; typical val-
ues at 2 GHz).
If the intermodulation products of a DUT with a very high dynamic range are to be
measured and the resolution bandwidth to be used is therefore very small, it is best to
measure the levels of the useful signals and those of the intermodulation products sep-
arately using a small span. The measurement time will be reduced- in particular if the
offset of the useful signals is large. To find signals reliably when frequency span is
small, it is best to synchronize the signal sources and the R&S
ESR.
Measurement Results
As a result of the TOI measurement, the following values are displayed in the marker
area of the diagram:
Label
Description
TOI
Third-order intercept point
M1
Maximum of first useful signal
M2
Maximum of second useful signal
M3
First intermodulation product
M4
Second intermodulation product
Remote command
The TOI can also be queried using the remote command
MARKer<m>:FUNCtion:TOI:RESult?
Measurements
