Making Measurements Using Spectrum Analyzer Mode
Using the
Setting the Gate Delay and Gate Length Properly, When NOT Using the Gate Utility
If the gate delay and gate length are not set properly, you may not be viewing an accurate representation of a signal. For example, If the gate does not occur during the RF pulsed signal, the amplitude of the signal displayed on the spectrum analyzer is lower than the actual signal. See Figure
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E N T E R | 5 0 . 0 8 | M.H z |
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tRES BW | 1E0 | kHz | #UBW | 108 kHz | aswp | 150 msec | R' |
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Figure
The time gate is implemented after the resolution bandwidth filtering and before the video filtering. The displayed signal is a result of the decay time for the resolution bandwidth hlters and is not an accurate representation of the input signal.
If the gate occurs at the beginning of the RF pulse signal or at the end of the RF pulse signal, the signal displayed on the spectrum analyzer can be attenuated or contain transient signals caused by the spectrum analyzer (see Figure