Hello,705.6k is likely not a supported sample rate on the RTLSDR.
I run gnuradio latest stable installation on a 64bit Ubuntu Installation with Pentium 977 + 8GB RAM. I use the DVB-T Hama Nano DVB-T-Stick which is one of the RTL-Chip derivates. I tried to create a FM-Radio reception which only consists of the OsmoSDR-Srouce, A WBFM Receive PLL and the Audio Sink (see attached png)
What I get is a stuttered signal processing of the recepition. I can here the radio signal, but it is interrupted at a rate of approximately 3 Hz. I checked the CPU load but it is well below 100%. Does anyone have an idea what I did wrong? I would appreciate any sort of suggestions. Thanks!
Additional experiment: when I make a chain of sine-wave -> WBFM-Transmitter -> WBFM-Receiver -> Audio Sink, with the sample rates as shown in the original fm receiver, there is continuous playback. Therefore I expect that it has something to do with the OsmoSDR, libusb, rtl-driver, rtl-chip.
Any suggestions?
Regards,
Markus================================m48/m48+ by Markus Gonser
Internet: http://www.mksg.dem48 on the AppStore: http://itunes.com/apps/m48m48+ on the AppStore: http://itunes.apple.com/app/m48/id341541461?mt=8E-Mail: address@hidden
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It's fairly rare that sample rates on any SDR are exactly multiples of audio rates, so you have to use
rational resamplers, or fractional interpolators to match rates.
-- Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org