Problem with USRP

[stephensworld]

Hi,

can someone help me? I would like to use Ettus B100 with OpenWebRx.

Thanks Stephan

[ha7ilm]

Hi Stephan,

Could you check it with different sample rates?

(Unfortunately I do not know a list of correct sampling rate settings for the USRP1, but you might find it in other software, etc.)

In addition I've made a simple flowgraph for You to check if the osmocom source block works at all: test1.grc.zip

Cheers, Andras

[stephensworld]

Hi Andras,

thank you very much for the answer.

Same error... I think it is a problem with the options block.

[ha7ilm]

Okay. Then it might not be the window size of a filter or something. It rather looks the WX GUI window size... :smile: Check the Options block. If you can't find the problematic part, post the screenshot here.

[ha7ilm]

If there is a "window size" option over there, you should enter a value like that:

800, 800

[ha7ilm]

Okay, that's the way to fix it:

[stephensworld]

Thank you very much :-)

[stephensworld]

I get this out: `python osmocom_source.py linux; GNU C++ version 4.8.2; Boost_105400; UHD_003.005.005-0-unknown

gr-osmosdr 0.1.1 (0.1.1) gnuradio 3.7.2.1 built-in source types: file osmosdr fcd rtl rtl_tcp uhd hackrf bladerf rfspace -- USRP-B100 clock control: 10 -- r_counter: 2 -- a_counter: 0 -- b_counter: 20 -- prescaler: 8 -- vco_divider: 5 -- chan_divider: 5 -- vco_rate: 1600.000000MHz -- chan_rate: 320.000000MHz

-- out_rate: 64.000000MHz

-- Using subdev spec 'A:AB'. Press Enter to quit: `

and

`python openwebrx.py

OpenWebRX - Open Source SDR Web App for Everyone! | for license see LICENSE file in the package

---

Author contact info: Andras Retzler, HA7ILM randras@sdr.hu

[openwebrx-main] Configuration script not specified. I will use: "config_webrx.py" [openwebrx-import] Found plugin: plugins.dsp.csdr.plugin Ncat: Version 6.40 ( http://nmap.org/ncat ) [openwebrx-main] Started rtl_thread: cat /tmp/osmocom_fifo| ncat -4l 4951 -k --send-only --allow 127.0.0.1 [openwebrx-main] Waiting for I/Q server to start... [openwebrx-main] I/Q server started. [openwebrx-main] Starting watchdog threads. [openwebrx-main] Starting spectrum thread. [openwebrx-spectrum] Spectrum thread initialized successfully. [openwebrx-dsp-plugin:csdr] Command = ncat -v 127.0.0.1 4951 | csdr fft_cc 4096 2777 | csdr logaveragepower_cf -70 4096 10 | csdr fft_exchange_sides_ff 4096 | csdr compress_fft_adpcm_f_u8 4096 [openwebrx-main] Starting HTTP server. [openwebrx-spectrum] Spectrum thread started. Ncat: Version 6.40 ( http://nmap.org/ncat ) Ncat: Connected to 127.0.0.1:4951.

`

If I login to webif I can't hear any noise.

I have already changed this lines in the config file: start_rtl_command="cat /tmp/osmocom_fifo" format_conversion=""

[stephensworld]

Now I can here signals. I had to change the path in the file_sink to /tmp/osmocom_fifo