On 5 March 2016 at 05:08, Jay Radcliffe <[email protected]> wrote: > > I am working with an older Jawbreaker with current firmware (2015.07.2) and > am seeing something odd.
So that we can rule it out, have you performed the antenna modification? It's detailed here https://github.com/mossmann/hackrf/wiki/Jawbreaker#set-your-jawbreaker-free > 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? What happens when you run other tools, such as gqrx to listen to broadcast FM? Or dump1090 (https://github.com/itemir/dump1090_sdrplus) to see ADS-B messages? Do they work, or is the noise causing a problem for them too? Does turning the amplifier on/off change things? Thanks, Dominic _______________________________________________ HackRF-dev mailing list [email protected] https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
