Spectrum Measurements
R&S
®
ESRP
406
User Manual 1175.7445.02 ─ 08
The R&S
ESRP is in its default state.
2. Set center frequency to
1 GHz
and the frequency span to
3 MHz
.
3. Set the reference level to
-10 dBm
and RF attenuation to
0 dB
.
4. Set the resolution bandwidth to
10 kHz
.
The noise is reduced, the trace is smoothed further and the intermodulation prod-
ucts can be clearly seen.
5. Set the VBW to "1 kHz".
Measuring intermodulation using the 3
rd
order intercept (TOI)measurement func-
tion
1. Press the [MEAS] key and then the "TOI" softkey.
The R&S
ESRP activates four markers to measure the intermodulation distance.
Two markers are positioned on the useful signals and two on the intermodulation
products. The 3
rd
order intercept is calculated from the level difference between the
useful signals and the intermodulation products. It is then displayed on the screen:
Figure 6-24: Result of intrinsic intermodulation measurement on the R&S
ESRP.
The 3rd order intercept (TOI) is displayed at the top right corner of the grid.
Advanced Measurement Examples
