Proxmark3 community

ryan

Contributor

Registered: 2009-06-17

Posts: 36

Email

New tune Command Output

I decided to try the new tune command on my antenna, and I got some unexpected results.

>> Started prox, built Jul 13 2009 15:43:22
 Connected to device
> tune


# LF antenna: 37.73 V @   125.00 kHz
# LF antenna: 30.35 V @   134.00 kHz
# LF optimal:  0.23 V @     9.42 kHz
# HF antenna:  7.48 V @    13.56 MHz
# Your LF antenna is unusable.

The voltages seem to be ok, and I can read HID proxcards (only thing i have handy to test with at the moment) from about 2 inches away.  Is my antenna really that bad?  Am I missing something?

-ryan

ryan

Contributor

Registered: 2009-06-17

Posts: 36

Email

Re: New tune Command Output

So for some reason, now my output seems better.  I don't think I changed anything that would have affected the operation of the antenna.

# LF antenna: 33.17 V @   125.00 kHz
# LF antenna: 41.89 V @   134.00 kHz
# LF optimal: 41.76 V @   127.66 kHz
# HF antenna:  7.48 V @    13.56 MHz

I have no explanation for the change in output.  For now I'll just blame sunspots.

-ryan

adam@algroup.co.uk

Contributor

From: UK

Registered: 2009-05-01

Posts: 203

Email Website

Re: New tune Command Output

If you hadn't flashed the PM3 with the new firmware when you first ran it that would have produced weird results.

ryan

Contributor

Registered: 2009-06-17

Posts: 36

Email

Re: New tune Command Output

I thought I had flashed it before, but maybe I gave it the wrong osimage.  I did rerun svn update and reflashed the pm3 between the weird results and the expected results, so that must have been it.

Thanks!