Owner's Manual

7.1.2 Conducted Power Measurements with Modulated Carrier
Depending on the applied modulation scheme, and the spectrum analyzer settings specified by the relevant EMC regulations, the
measured power levels are usually lower compared to the results with unmodulated carrier. These differences will be measured and
used as relaxation factors on the results of the radiated measurement performed with unmodulated carrier. This way, the radiated com-
pliance with modulated transmission can be evaluated.
In this case, both the ETSI EN 300-220-1 and the FCC 15.247 regulations define the following spectrum analyzer settings for measur-
ing the unwanted emissions above 1 GHz:
• Detector: Average
• RBW: 1 MHz
The table below shows the measured differences for the Z-Wave Long Range modulation scheme. These values will be used as relaxa-
tion factors for the radiated measurements.
Table 7.1. Measured Relaxation Factors
Harmonic Z-Wave Long Range
2nd harmonic -2.0
3rd harmonic -4.5
4th harmonic -7.9
5th harmonic -9.1
6th harmonic -11.5
7th harmonic NA
8th harmonic NA
9th harmonic NA
10th harmonic NA
Note: Above the 6th harmonic the conducted power levels were under the spectrum analyzer noise floor, so it was not possible to
measure the relaxation.
BRD4207A Reference Manual
RF Performance
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