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#1 2010-04-13 08:48:51
- psam
- Member
- Registered: 2010-01-22
- Posts: 3
antenna is unusable
I have buy the Proxmark 3 + Antenna, but when I run the "tune" command several times, I keep getting this result:
>> Started prox, built Sep 5 2009 16:26:21
>> Connected to device
> tune
# LF antenna: 0.00 V @ 125.00 kHz
# LF antenna: 0.00 V @ 134.00 kHz
# LF optimal: 0.23 V @ 9.42 kHz
# HF antenna: 0.00 V @ 13.56 MHz
# Your LF antenna is unusable.
# Your HF antenna is unusable.
What I should do to find the problem?
Thanks in advance!
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#2 2010-04-13 10:20:35
- toffe
- Member
- Registered: 2010-03-07
- Posts: 13
Re: antenna is unusable
It's difficult to answer this by the information you've given. Please complete the following details:
Where did you buy the Proxmark3, purchase date? This is important since boards bought from proxmark3.com have different values of C35 depending on purchase date: All boards purchased on or after Mar 29 have 47pF caps. Those purchased before have 100pF caps.
Which antenna do you have? How do you connect it? Are you able to post a picture of your setup?
Note that it's not only a matter of connecting the supplied Hirose-cable to the connector and leaving the USB-connector on the other side! Check out Antennas on the Wiki. In short, in order for an antenna to be usable, it must consist of a loop of wire. In order to work, it must be properly tuned.
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#3 2010-04-13 10:51:42
- psam
- Member
- Registered: 2010-01-22
- Posts: 3
Re: antenna is unusable
It's difficult to answer this by the information you've given. Please complete the following details:
Where did you buy the Proxmark3, purchase date? This is important since boards bought from proxmark3.com have different values of C35 depending on purchase date: All boards purchased on or after Mar 29 have 47pF caps. Those purchased before have 100pF caps.
Which antenna do you have? How do you connect it? Are you able to post a picture of your setup?
Note that it's not only a matter of connecting the supplied Hirose-cable to the connector and leaving the USB-connector on the other side! Check out Antennas on the Wiki. In short, in order for an antenna to be usable, it must consist of a loop of wire. In order to work, it must be properly tuned.
Here are some pictures.
this proxmarks is buy more dan 4 months ago.
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#4 2010-04-13 12:29:16
- proxcat
- Contributor
- Registered: 2008-11-28
- Posts: 62
- Website
Re: antenna is unusable
You can obtain HF PCB antennas from proxmark3.com. These simply plug-in on the hirose port and there's no need to fuss with test points. They work with both 100pF or 47pF caps on the Proxmark with the aid of a switch.
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#5 2010-04-13 15:53:57
- psam
- Member
- Registered: 2010-01-22
- Posts: 3
Re: antenna is unusable
You can obtain HF PCB antennas from proxmark3.com. These simply plug-in on the hirose port and there's no need to fuss with test points. They work with both 100pF or 47pF caps on the Proxmark with the aid of a switch.
The antenna is good this should work, for the test i have used another antenna but this had the same effect
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