Spectrum (Custom IQ)

When Custom IQ is enabled, the Spectrum trace is the averaged Instantaneous Spectrum display, as shown in the following block diagram. If averaging is OFF, the Spectrum and Inst Spectrum displays are identical.

The Spectrum trace has the following characteristics:

Derived from pre-demodulated Time data, which is 20% larger than the Result Length parameter.
Averaged if averaging is ON and the average type is RMS(Video), RMS(Video) Exponential, Time, Time Exponential or Continuous Peak Hold averaging.

If averaging is ON, a scan is not included in the average if any of these conditions exist: Pulse Not Found, Sync Not Found, Carrier Unlock. For other demodulators such as W-CDMA or cdma2000, certain DATA? conditions can cause a scan to not be included in the average.

$image\blk_spectrum_wmf.jpg$