[Hackrf-dev] High Noise Floor

[Jay Radcliffe]

Wanted to thank Mike and Dominic for their responses.

1. I did perform the antenna mod.
2. Use of other tools produced the same results. I even switched to a
different laptop and different cable to see if that had an impact.

3. I updated the firmware some time ago, and was pretty sure that I did the
CPLD at the same time. But just to be completely sure I updated it again.
IT WORKED! Thanks Mike for that suggestion!

Jay n8os

Jay Radcliffe
Twitter: @jradcliffe02
E-Mail: jay.radcliffe at gmail.com
LinkedIn + Resume: http://www.linkedin.com/in/jradcliffe02

On Sun, Mar 6, 2016 at 6:00 AM, Mike Walters <mike at flomp.net> wrote:

> Did you update the CPLD when updating firmware?
>
> On 5 March 2016 at 05:08, Jay Radcliffe <jay.radcliffe at gmail.com> wrote:
>
>> Hello,
>>
>> I am working with an older Jawbreaker with current firmware (2015.07.2)
>> and am seeing something odd. When I just run a simple source -> FFT in GRC
>> the baseline of the noise floor is quite high (around -40db). When I take
>> the antenna off it drops down to -90db. Tried several antennas with same
>> results. I have tried the FM broadcast band, 440mhz and 915mhz. Typically
>> when I see examples of the FFT in a demonstration or presentation the noise
>> floor is in the -80/-90 range. I am using the default setting for the FFT
>> and osmocom source blocks. Anyone have any ideas about this or have see
>> this behavior before?
>>
>> Thanks,
>>
>>
>> Jay
>>
>>
>> Jay Radcliffe
>> Twitter: @jradcliffe02
>> E-Mail: jay.radcliffe at gmail.com
>> <https://mail.google.com/mail/?view=cm&fs=1&tf=1&to=jay.radcliffe@gmail.com>
>> LinkedIn + Resume: http://www.linkedin.com/in/jradcliffe02
>>
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>>
>>
>
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