Ceyear 4051 Series, User Manual

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4. Operating Instruction
4.2 Advanced operation guide
160
Fig. 4.79 Results of Three-order Intermodulation Measurement
4.2.17 Spurious emission
4.2.17.1 Basic concept
Spurious emission measurement identifies and defines the power level of spurious emission within certain
bandwidth and is mainly used to measure spurious signals, harmonic and intermodulation. In practice,
spurious emissions should ensure to be under a lower power level, preferably close to the background noise to
avoid interfering with communication of other frequency bands.
4.2.17.2 Measurement Example
This section mainly introduces how to measure the spurious emission of signals, by using spurious signals on
frequency spectrum of pulse signal simulation measurement.
Step 1. Set signal source as below:

Set up the repetition frequency as 1 kHz pulse signal.
 Set frequency on signal source to 1.920GHz.
 Set signal amplitude to -10dBm.
Step 2. Connect the radio frequency output port of the signal source to that of the analyzer. As shown in
Fig. 4.80: