Packet Spectrum (Low | Mid | High Band) (MB-OFDM)
The Low | Mid | High Band trace shows just the corresponding Low | Mid | High Band Spectrum portion of the composite spectrum for analysis. To view a composite spectrum with the Low, Mid, and High bands, see the trace Composite Packet Spectrum. If the trace reports DATA? instead of data, or other problems, see Trace Problems.
The VSA uses the entire Packet Length to develop this spectrum. Compare this spectrum with the ideal band spectrum defined by the Spectral Mask.
The (RBW Resolution Band Width (RBW or ResBW): specifies the minimum frequency bandwith that two separate frequency spectra can be resolved and viewed seperately. For FFT (digital) based VSA's the process is equivalent to passing a time-domain signal through a bank of bandpass filters, whose center frequencies correspond to the frequencies of the FFT bins. For a traditional swept-tuned (non-digital) spectrum analyzer, the resolution bandwidth is the bandwidth of the IF filter which determines the selectivity.) is the setting of the parameter Packet Avg RBW, with a default value of 5 MHz Megahertz: A unit of frequency equal to one million hertz or cycles per second..
With Pre-Packet Time = 0 and Post-Packet Time = 0, set the Result Length such that the Packet Time trace goes exactly to the end of the packet. After setting these conditions, the measurement may need to be restarted to acquire the additional data.
See Also
Packet Spectrum (Composite) (MB-OFDM)
