Re: [Discuss-gnuradio] Unable to find field sync for over the air HDTV signal

2007-10-15 Thread 'Eric Blossom'
On Wed, Oct 10, 2007 at 06:34:40PM -0500, Nirali Patel wrote: > Hi Eric, > > Attached is the screenshot for the spectrum at 587Mhz. I will soon get a > link so next time I won't attach! > It looks like there is some multipath towards the upper end but not a deep > notch or anything severe that wo

RE: [Discuss-gnuradio] Unable to find field sync for over the air HDTV signal

2007-10-12 Thread Nirali Patel
Hello Eric, > [In looking at interp.py, it could be modified to run something like > 4x faster by using gr.interp_fir_filter_ccf instead of what's in > there. Also, decimating by 10 seems a bit agressive. By 8 would give > you more usable signal, though would require changes in the interp.py > c

Re: [Discuss-gnuradio] Unable to find field sync for over the air HDTV signal

2007-10-10 Thread Eric Blossom
On Wed, Oct 10, 2007 at 01:56:11PM -0700, Eric Blossom wrote: > > What does the output of usrp_fft -d 8 -f 587 look like? Should be > What does the output of usrp_fft -d 8 -f 587M look like? Eric ___ Discuss-gnuradio mailing list Discuss-gnuradio@gn

Re: [Discuss-gnuradio] Unable to find field sync for over the air HDTV signal

2007-10-10 Thread Eric Blossom
On Wed, Oct 10, 2007 at 03:23:51PM -0500, Nirali Patel wrote: > Hello everyone, > > I am trying to capture a few seconds of over the air HDTV on a file and then > decode using the files in gr-atsc module according to the instructions in > the README at gr-atsc/src/python. I am using the following