Proxmark developers community

Research, development and trades concerning the powerful Proxmark3 device.

Remember; sharing is caring. Bring something back to the community.


"Learn the tools of the trade the hard way." +Fravia

You are not logged in.

#1 2015-02-23 04:29:46

marshmellow
Moderator
From: US
Registered: 2013-06-10
Posts: 2,091

lf modulating

I'd like to build a sim command for NRZ/Direct modulation.  i've been looking through the Modulating on and off toggles for LF and I don't see a way to simulate what NRZ/Direct appears to do.  i can make the wave high or low but not middle...  half modulated?  it appears this is not implemented yet in LF, or have i missed something? 

I'm going to continue attempting to learn more about the code that exists and see where i can get to, but if anyone more familiar with the code wants to chime in I'd appreciate it greatly.  smile

Thanks!


EDIT:
NRZ doesn't half modulate to the middle it just can't sustain the power when an antenna is left modulating(or not modulating) for long periods of time. (therefore it appears to drop off until it settles near the middle)

NRZ only has two antenna states (like all rfid)  Modulating or NOT.  it just tends to hold it longer than any other modulation type.

Offline

#2 2015-02-23 09:53:37

iceman
Administrator
Registered: 2013-04-25
Posts: 4,070
Website

Re: lf modulating

Isn't full power = 1 ,  no power = 0,   how about you find a  half power state?


modhex(hkhehghthbhudcfcdchkigiehgduiehg)

Offline

Board footer

Powered by FluxBB