Demod Summary (RFID)

Menu Path: Trace > Data > Demod > Summary

The  Demod Summary table displays the results of the RFID demodulation analysis. The information presented in the trace table depends on the type of modulation format specified by the Fwd Format or the Ret Format selection on the Format tab and on the direction of the burst specified by the Burst Search parameters. The table types are:

• ASK Summary
• FSK Summary

Generating the Table Data

The RFID demodulation analysis generates two Meas Time traces, Demod Meas Time and Demod Meas Time with CW. (Demod Meas Time is created by removing CW from the Demod Meas Time with CW trace.)  

These two Meas Time traces are normalized by , where:

,

,

Ai : On-Amplitude of i-th pulse,

Bi  : Off-Amplitude of i-th pulse,

N : Number of pulses.

Therefore, all amplitude-related results are calculated from these two traces are normalized by .

The average Mod Depth is defined as: .

The average Mod Index is defined as: .

The following illustration shows how RFID derives some measurements.

 

 

 

The table below describes the ASK Summary Table entries:

ASK Summary Table Entries
Mod Depth Mod Index  On Amp Off Amp On Ripple OS On Ripple US Off Ripple OS Off Ripple US ASK Err	Duty Cycle  On Width Off Width D0 Time D1 Time Rise Time Fall Time Freq Err Bit Rate	Tag Phase Tag Amp

FSK Frequency Shift Keying: A form of modulation using multiple carrier frequencies to carry the digital information. The most common is the two frequency FSK system using the two frequencies to carry the binary ones and zeros. Summary Table Entries
Fsk Err Mag Err	Deviation  Freq Err

See Also

Fwd Format (RFID)

Ret Format (RFID)

Burst Search (RFID)

Burst Index (RFID)

Demod Meas Time (RFID)

Demod Meas Time With CW (RFID)

Format Tab (RFID Demod Properties)