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Re: [Discuss-gnuradio] UHD example
From: |
Elvis Dowson |
Subject: |
Re: [Discuss-gnuradio] UHD example |
Date: |
Fri, 16 Jul 2010 21:40:18 +0400 |
Hi Josh,
On Jul 16, 2010, at 9:09 PM, Josh Blum wrote:
> This is a bug in the wbx reference divider code. It will be fixed soon. What
> frequency were you requesting?
I was entering 1e6 (1000000 Hz), which was an incorrect value I guess, since
the WBX cannot receive 1 MHz, which resulted in the following error:
terminate called after throwing an instance of 'std::invalid_argument'
what(): key not found in dict
I tried with 2e9 (2GHz), and since that was within a valid input range, now it
gives me the following error:
>>> gr_fir_fff: using SSE
Current recv sock buff size: 50000000 bytes
Current send sock buff size: 50000000 bytes
Using: WBX TX (0x0053)
Using: WBX RX (0x0052)
RX samples per packet: 362
TX samples per packet: 363
Recv pirate num frames: 33967
gr_block_executor: source <gr_block uhd simple source (7)> produced no output.
We're marking it DONE.
I have attached the GRC file :
usrp2_wfm_rcv.grc
Description: Binary data
Do you have a working GRC example of WFM demodulation? I'm having difficultly
trying to covert the existing python script to GRC, since the libraries are
unfamiliar to me at the moment.
e.g. I don't know which GRC blocks correspond to the following code fragments:
# channel filter co-efficients
chan_filt_coeffs = optfir.low_pass (1, # gain
usrp_rate, # sampling rate
80e3, # passband cutoff
115e3, # stopband cutoff
0.1, # passband ripple
60) # stopband attenuation
chan_filt = gr.fir_filter_ccf (chanfilt_decim, chan_filt_coeffs)
Best regards,
Elvis Dowson
- [Discuss-gnuradio] UHD example, Elvis Dowson, 2010/07/16
- Re: [Discuss-gnuradio] UHD example, Josh Blum, 2010/07/16
- Re: [Discuss-gnuradio] UHD example,
Elvis Dowson <=
- Re: [Discuss-gnuradio] UHD example, Elvis Dowson, 2010/07/16
- Message not available
- Message not available
- Message not available
- Re: [Discuss-gnuradio] UHD example, Elvis Dowson, 2010/07/19
- Re: [Discuss-gnuradio] UHD example, Philip Balister, 2010/07/19
- Re: [Discuss-gnuradio] UHD example, Elvis Dowson, 2010/07/22
- Re: [Discuss-gnuradio] UHD example, Josh Blum, 2010/07/22
- Re: [Discuss-gnuradio] UHD example, Elvis Dowson, 2010/07/22
- Re: [Discuss-gnuradio] UHD example, Elvis Dowson, 2010/07/22
- Re: [Discuss-gnuradio] UHD example, Josh Blum, 2010/07/22