Spectrum (RFID)

The Spectrum trace shows the frequency spectrum of the Time trace. When RFID Demodulation 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:

It is derived from pre-demodulated time data, which is usually 20% larger than the result length. See Time.
It is averaged if averaging is ON and the average type is rms, rms exponential, or peak 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, or certain DATA? conditions.

Averaging is available only when the Auto Direction parameter is cleared.

The following block diagram shows the VSA signal flow to produce the Spectrum trace: