Re: [Discuss-gnuradio] How to retune a daughterboard/bring up the sample rate on USRP?

2011-06-28 Thread Josh Blum
On 06/28/2011 06:29 PM, Marcus D. Leech wrote: > On 06/28/2011 08:27 PM, Josh Blum wrote: >> You should be able to re-adjust the digital frequency shift very >> quickly, which can go +/- 32MHz. On USRP1, this is implemented in the >> DAC (not the FPGA DSP). You can do this w/ tune_request_t in uh

Re: [Discuss-gnuradio] How to retune a daughterboard/bring up the sample rate on USRP?

2011-06-28 Thread Marcus D. Leech
On 06/28/2011 08:27 PM, Josh Blum wrote: You should be able to re-adjust the digital frequency shift very quickly, which can go +/- 32MHz. On USRP1, this is implemented in the DAC (not the FPGA DSP). You can do this w/ tune_request_t in uhd, no idea about libgnuradio-usrp -Josh This raises an

Re: [Discuss-gnuradio] How to retune a daughterboard/bring up the sample rate on USRP?

2011-06-28 Thread Josh Blum
> Also, getting re-tuning to happen in under 1ms is going to be a > challenge. It's unlikely that you'll get the PLL synthesizer on the > RFX2400 to > re-lock in under 1ms. > > You should be able to re-adjust the digital frequency shift very quickly, which can go +/- 32MHz. On USRP1, this is

Re: [Discuss-gnuradio] How to retune a daughterboard/bring up the sample rate on USRP?

2011-06-28 Thread Marcus D. Leech
On 06/28/2011 07:48 PM, Minhoo Kim wrote: Hello, I'm new to this mailing list and gnuradio. sorry if I fail follow certain etiquettes.. what I'm trying to do now is to have a transmitter that hops around under 1ms, which needs to have 1MHz bandwidth and hop around in 10MHz range total (at least).

Re: [Discuss-gnuradio] How to retune a daughterboard/bring up the sample rate on USRP?

2011-06-28 Thread Colby Boyer
On Tue, Jun 28, 2011 at 4:48 PM, Minhoo Kim wrote: > > Hello, I'm new to this mailing list and gnuradio. > sorry if I fail follow certain etiquettes.. > what I'm trying to do now is to have a transmitter that hops around under > 1ms, which needs to have 1MHz bandwidth and hop around in 10MHz rang

[Discuss-gnuradio] How to retune a daughterboard/bring up the sample rate on USRP?

2011-06-28 Thread Minhoo Kim
Hello, I'm new to this mailing list and gnuradio. sorry if I fail follow certain etiquettes.. what I'm trying to do now is to have a transmitter that hops around under 1ms, which needs to have 1MHz bandwidth and hop around in 10MHz range total (at least). the problem I'm having is that I can't get