Re: [Discuss-gnuradio] Trying to use the complex int16 option of the UHD blocks

2012-07-22 Thread Josh Blum
On 07/22/2012 01:14 PM, Nazmul Islam wrote: > Hello, > > I am trying to use the complex int16 option of the UHD (source/sink) > blocks in my GRC generated python codes. I am doing wide band spectral > analysis in my experiments. Therefore, 50 MS/s will be very helpful for me. > The host forma

Re: [Discuss-gnuradio] Trying to use the complex int16 option of the UHD blocks

2012-07-26 Thread Nazmul Islam
Hi Josh, I am just wondering how the USRP performs the 8 bit mapping for I & Q samples. The ADC & DAC have 12 - 14 bit precision, I think. When I select the sc8 wire format, does the USRP divide the entire received signal range into 2^8 sectors and uses one number to represent each of those? Than

Re: [Discuss-gnuradio] Trying to use the complex int16 option of the UHD blocks

2012-07-26 Thread Josh Blum
On 07/26/2012 05:09 PM, Nazmul Islam wrote: > Hi Josh, > > I am just wondering how the USRP performs the 8 bit mapping for I & Q > samples. The ADC & DAC have 12 - 14 bit precision, I think. When I select > the sc8 wire format, does the USRP divide the entire received signal range > into 2^8 sec

Re: [Discuss-gnuradio] Trying to use the complex int16 option of the UHD blocks

2012-07-26 Thread Nazmul Islam
Thanks, Josh. How can I specify the peak from GRC generated Python code? For example, when I select the sc8 wire format, the following code is generated through GRC. stream_args=uhd.stream_args( cpu_format="fc32", otw_format="sc8", channels=range(1)

Re: [Discuss-gnuradio] Trying to use the complex int16 option of the UHD blocks

2012-07-27 Thread Josh Blum
try entering peak = 0.5 for stream args in grc usrp block and take a look at the generated code _josh On 07/26/2012 05:58 PM, Nazmul Islam wrote: > peak = 0.5 ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/list