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Re: [Discuss-gnuradio] UHD: trouble configuring multiple RX channels rel
From: |
Michael Dev |
Subject: |
Re: [Discuss-gnuradio] UHD: trouble configuring multiple RX channels reliably |
Date: |
Wed, 27 Apr 2011 22:10:23 -0700 |
Thanks for the fix. I tested it on my USRP1 + 2 DBSRX system and it seems to work.
There are couple of remaining issue though.
1. The instability problem is still there. If I keep restarting my app, USRP1 seems to come up in a state where I get either corrupted IQ signal (in what way, I don't know. Sometime lower SNR, sometimes flat garbage) or one of the initialization UHD calls (multi_usrp::make, set_rx_freq, etc) just hang and require device power cycle. It doesn't take many trials to hit this state. I don't have this issue when I use the gnuradio framework. Note that I've been having this issue with E100 (w/ a RFX dboard) as well so I don't think it's a motherboard or DBSRX specific problem.
2. The latest UHD repository master (4/27) seems to have a serious regression for E100. I get data samples coming in but expected signal is not there (or corrupted in serious way). As I replied to you in another thread, I saw this happen also with the "usrp_e100_frame_size2" branch you posted for me on 4/26 and merged to the master today. In any case, my E100-friendly UHD git version is from 4/19, so it looks like the regression happened at some point between then and now.
For now I will use the latest master for my USRP1 and keep the old one for E100. :)
Michael
- [Discuss-gnuradio] UHD: trouble configuring multiple RX channels reliably, Michael Dev, 2011/04/26
- Re: [Discuss-gnuradio] UHD: trouble configuring multiple RX channels reliably, Josh Blum, 2011/04/27
- Re: [Discuss-gnuradio] UHD: trouble configuring multiple RX channels reliably,
Michael Dev <=
- Re: [Discuss-gnuradio] UHD: trouble configuring multiple RX channels reliably, Josh Blum, 2011/04/28
- Re: [Discuss-gnuradio] UHD: trouble configuring multiple RX channels reliably, Michael Dev, 2011/04/28
- Re: [Discuss-gnuradio] UHD: trouble configuring multiple RX channels reliably, Michael Dev, 2011/04/28
- Re: [Discuss-gnuradio] UHD: trouble configuring multiple RX channels reliably, Josh Blum, 2011/04/28
- Re: [Discuss-gnuradio] UHD: trouble configuring multiple RX channels reliably, Michael Dev, 2011/04/28
- Re: [Discuss-gnuradio] UHD: trouble configuring multiple RX channels reliably, Michael Dev, 2011/04/28
- Re: [Discuss-gnuradio] UHD: trouble configuring multiple RX channels reliably, Michael Dev, 2011/04/29