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Today's Topics:
1. USRP2 + DBSRX2 fails to set IF filter bandwidth with --bw
(Michele Bavaro)
2. Re: USRP2 + DBSRX2 fails to set IF filter bandwidth with --bw
(Josh Blum)
3. Re: USRP2 + DBSRX2 fails to set IF filter bandwidth with --bw
(Marcus D. Leech)
----------------------------------------------------------------------
Message: 1
Date: Tue, 4 Jun 2013 14:37:06 +0200
From: Michele Bavaro <[email protected]>
To: [email protected]
Subject: [USRP-users] USRP2 + DBSRX2 fails to set IF filter bandwidth
with --bw
Message-ID:
<caoveyy7rv8tbgbkru7wvzooz+vxoftuzxd6j0ptaoexjrfs...@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"
Hi all,
I have a USRP2 and DBSRX2. The examples provided with the UHD on Ubuntu
12.04LTS fail to set the IF filter bandwidth, see below. Could anyone
advise why this happens?
> ./rx_single_samples_to_file --rate=5000000 --freq=1575000000 --bw
10000000 --gain 80
linux; GNU C++ version 4.6.3; Boost_104800; UHD_003.005.003-78-g49a4929b
Creating the usrp device with: ...
-- Opening a USRP2/N-Series device...
-- Current recv frame size: 1472 bytes
-- Current send frame size: 1472 bytes
Using Device: Single USRP:
Device: USRP2 / N-Series Device
Mboard 0: USRP2 r3
RX Channel: 0
RX DSP: 0
RX Dboard: A
RX Subdev: DBSRX2
TX Channel: 0
TX DSP: 0
TX Dboard: A
TX Subdev: Unknown (0xffff) - 0
Setting RX Rate: 5.000000 Msps...
Setting RX Freq: 1575.000000 MHz...
Setting RX Gain: 80.000000 dB...
*Setting RX Bandwidth: 10000000.000000 MHz...*
Actual RX Rate: 5.000000 Msps...
Actual RX Freq: 1575.000000 MHz...
Actual RX Gain: 80.000000 dB...
*Actual RX Bandwidth: 15540000.000000 MHz...*
Checking RX: LO: locked ...
Press Ctrl + C to stop streaming...
^C
Done!
Cheers,
Michele
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Message: 2
Date: Tue, 04 Jun 2013 09:41:06 -0400
From: Josh Blum <[email protected]>
To: [email protected]
Subject: Re: [USRP-users] USRP2 + DBSRX2 fails to set IF filter
bandwidth with --bw
Message-ID: <[email protected]>
Content-Type: text/plain; charset=ISO-8859-1
On 06/04/2013 08:37 AM, Michele Bavaro wrote:
> Hi all,
>
> I have a USRP2 and DBSRX2. The examples provided with the UHD on Ubuntu
> 12.04LTS fail to set the IF filter bandwidth, see below. Could anyone
> advise why this happens?
>
Thats likely the granularity of the bandwidth filter settings. Here is
the formula:
https://github.com/EttusResearch/uhd/blob/release_003_005_003/host/lib/usrp/dboard/db_dbsrx2.cpp#L357
-josh
>
>> ./rx_single_samples_to_file --rate=5000000 --freq=1575000000 --bw
> 10000000 --gain 80
> linux; GNU C++ version 4.6.3; Boost_104800; UHD_003.005.003-78-g49a4929b
>
>
> Creating the usrp device with: ...
> -- Opening a USRP2/N-Series device...
> -- Current recv frame size: 1472 bytes
> -- Current send frame size: 1472 bytes
> Using Device: Single USRP:
> Device: USRP2 / N-Series Device
> Mboard 0: USRP2 r3
> RX Channel: 0
> RX DSP: 0
> RX Dboard: A
> RX Subdev: DBSRX2
> TX Channel: 0
> TX DSP: 0
> TX Dboard: A
> TX Subdev: Unknown (0xffff) - 0
>
> Setting RX Rate: 5.000000 Msps...
> Setting RX Freq: 1575.000000 MHz...
> Setting RX Gain: 80.000000 dB...
> *Setting RX Bandwidth: 10000000.000000 MHz...*
>
> Actual RX Rate: 5.000000 Msps...
> Actual RX Freq: 1575.000000 MHz...
> Actual RX Gain: 80.000000 dB...
> *Actual RX Bandwidth: 15540000.000000 MHz...*
> Checking RX: LO: locked ...
> Press Ctrl + C to stop streaming...
> ^C
> Done!
>
>
> Cheers,
> Michele
>
>
>
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
------------------------------
Message: 3
Date: Tue, 04 Jun 2013 10:18:39 -0400
From: "Marcus D. Leech" <[email protected]>
To: [email protected]
Subject: Re: [USRP-users] USRP2 + DBSRX2 fails to set IF filter
bandwidth with --bw
Message-ID: <[email protected]>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> On 06/04/2013 08:37 AM, Michele Bavaro wrote:
>> Hi all,
>>
>> I have a USRP2 and DBSRX2. The examples provided with the UHD on Ubuntu
>> 12.04LTS fail to set the IF filter bandwidth, see below. Could anyone
>> advise why this happens?
>>
> Thats likely the granularity of the bandwidth filter settings. Here is
> the formula:
> https://github.com/EttusResearch/uhd/blob/release_003_005_003/host/lib/usrp/dboard/db_dbsrx2.cpp#L357
>
> -josh
>
>>> ./rx_single_samples_to_file --rate=5000000 --freq=1575000000 --bw
>> 10000000 --gain 80
>> linux; GNU C++ version 4.6.3; Boost_104800; UHD_003.005.003-78-g49a4929b
>>
>>
>> Creating the usrp device with: ...
>> -- Opening a USRP2/N-Series device...
>> -- Current recv frame size: 1472 bytes
>> -- Current send frame size: 1472 bytes
>> Using Device: Single USRP:
>> Device: USRP2 / N-Series Device
>> Mboard 0: USRP2 r3
>> RX Channel: 0
>> RX DSP: 0
>> RX Dboard: A
>> RX Subdev: DBSRX2
>> TX Channel: 0
>> TX DSP: 0
>> TX Dboard: A
>> TX Subdev: Unknown (0xffff) - 0
>>
>> Setting RX Rate: 5.000000 Msps...
>> Setting RX Freq: 1575.000000 MHz...
>> Setting RX Gain: 80.000000 dB...
>> *Setting RX Bandwidth: 10000000.000000 MHz...*
>>
>> Actual RX Rate: 5.000000 Msps...
>> Actual RX Freq: 1575.000000 MHz...
>> Actual RX Gain: 80.000000 dB...
>> *Actual RX Bandwidth: 15540000.000000 MHz...*
>> Checking RX: LO: locked ...
>> Press Ctrl + C to stop streaming...
>> ^C
>> Done!
>>
>>
>> Cheers,
>> Michele
>>
>>
>>
>> _______________________________________________
>> USRP-users mailing list
>> [email protected]
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
> _______________________________________________
> USRP-users mailing list
> [email protected]
> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>
I'll note that the "MHz" tag on those bandwidth prints is wrong....
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org
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