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#1 2011-03-14 20:41:49

rfnoid
Member
Registered: 2011-03-10
Posts: 2

Help with HF 14a

Hello,

I am researching ISO 14443 tags type A.  I've been trying to get a look at how the messages are actually formed using the plotting functions.  I used the proxmark to act as a reader (hi14areader) with no tag on the antenna, so the proxmark only sent '52' as a wakeup (confirmed with hi14alist).  I plotted the data as a bitstream and got the image shown. 


I do not see how that bitstream can possibly represent '52'.  Can someone please help me interpret it?  Is the reason that it looks so odd because of the 'Start' bit, which is referred to often in the ISO standard but only as 'S,' not as an actual bit or sequence, etc. ? Any help would be greatly appreciated!

Thanks very much!

Bitstream samples of '52'

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#2 2011-07-03 23:17:03

kra
Contributor
Registered: 2011-01-19
Posts: 59

Re: Help with HF 14a

I have the same problem

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