Send USRP-users mailing list submissions to
[email protected]
To subscribe or unsubscribe via the World Wide Web, visit
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
or, via email, send a message with subject or body 'help' to
[email protected]
You can reach the person managing the list at
[email protected]
When replying, please edit your Subject line so it is more specific
than "Re: Contents of USRP-users digest..."
Today's Topics:
1. Re: PCMCIA Express-card list for USRP B200
(Mike Willis via USRP-users)
2. Re: PCMCIA Express-card list for USRP B200
(Marcus M?ller via USRP-users)
3. Nagoya NA-773 Whip Wide-Band Mod for SDR
(Louis Brown via USRP-users)
4. Re: [Discuss-gnuradio] Avoid SSS printing
(Marcus M?ller via USRP-users)
----------------------------------------------------------------------
Message: 1
Date: Sat, 24 May 2014 18:37:53 +0100
From: Mike Willis via USRP-users <[email protected]>
To: <[email protected]>
Subject: Re: [USRP-users] PCMCIA Express-card list for USRP B200
Message-ID: <[email protected]>
Content-Type: text/plain; charset="iso-8859-1"
Hello Marcus,
Nice to hear from you again.
Yes, its something like that but every other USB3 device seems to work so I
can?t see any chance of this being fixed by the manufacturers. Although
Ettus may be standards compliant, it seems nearly everyone else isn?t
compliant with the standard. When apparently not even Intel?s chipsets are
compliant there is a problem. There ought to be some way to reboot the bus
in software rather than by re-plugging.
The laptop is a cheap Toshiba P75-A7100 ? it?s a desktop replacement with a
fairly fast CPU bought specially to support my B200. The USB3 chipset is
Intel 8 series / C220 xHCI rev04
The Express card was on another laptop and is a Startech ECUSB3S1
(http://cpc.farnell.com/startech/ecusb3s1/expresscard-adapter-1-port-usb3/dp
/CS25220), this is using the Renesas/NEC - ?PD720200we and know this
chipset has problems, but as far as I can tell the problems are exactly the
same as the Intel Series 8 chipset. Strange two manufacturers appear to made
the same mistake.
At the moment, anyone buying a B200 or B210 is taking the not inconsiderable
risk their USB3 chipset will not be compatible and even if you go out and
buy a new machine with a known chipset it?s a bit of a lottery because it
can change during production.
Mike
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/attachments/20140524/337eac50/attachment-0001.html>
------------------------------
Message: 2
Date: Sat, 24 May 2014 21:44:48 +0200
From: Marcus M?ller via USRP-users <[email protected]>
To: [email protected]
Subject: Re: [USRP-users] PCMCIA Express-card list for USRP B200
Message-ID: <[email protected]>
Content-Type: text/plain; charset=ISO-8859-1
Hi Mike,
>Nice to hear from you again.
thanks :) though I hope I'm getting the credits for Marcus D. Leech's
work here.
To reboot the USB3 bus, I usually execute something along the lines of
#!/bin/bash
for dir in $(find /sys/bus -type d -iname '*xhci*')
do echo "xhci controller driver $dir..."
for i in $(ls $dir |grep :)
do echo "Disabling $i"
echo $i > $dir/unbind
echo "enabling $i"
echo $i > $dir/bind
done
done
This will reset *all* USB3 buses (which might not be at all what you
want, but this way we don't have to look up the right device).
Greetings,
Marcus
------------------------------
Message: 3
Date: Sat, 24 May 2014 20:32:42 -0500
From: Louis Brown via USRP-users <[email protected]>
To: [email protected]
Subject: [USRP-users] Nagoya NA-773 Whip Wide-Band Mod for SDR
Message-ID: <[email protected]>
Content-Type: text/plain; charset=windows-1252
I have seen a few messages asking about small, cheap antennas to use for
portable SDRs, considering the RF bandwidths can span two decades. I found an
SMA female, 12? telescoping whip and made a video showing how to remove the
loading coil, along with the VSWR obtainable with an appropriate counterpoise
(i.e. B200 or bladeRF sized PCB). The OEM antenna (Nagoya NA-773) is very
inexpensive and easy to mod with basic dremel and soldering skills. VSWR of
3:1 is obtainable from 200 MHz through 6 GHz, with the exception of 1.8 - 2.2
GHz. I?ll probably do a follow-up experiment to see if tuning can be done by
receiving via a small, non-resnoant loop on the adjacent RX port.
https://www.youtube.com/watch?v=EFlhSkqZ9dE
Lou
KD4HSO
------------------------------
Message: 4
Date: Sun, 25 May 2014 16:50:17 +0200
From: Marcus M?ller via USRP-users <[email protected]>
To: [email protected], usrp-users <[email protected]>
Subject: Re: [USRP-users] [Discuss-gnuradio] Avoid SSS printing
Message-ID: <[email protected]>
Content-Type: text/plain; charset="iso-8859-1"
Hi Mauricio,
I'm going to go ahead and assume you're using an Ettus device, because
then these 'S' indicate a sequence error [1], not an underrun.
As this means that data reached your PC in the wrong order and most
probably could not be reordered. Your signal could be defective.
Don't ignore this warning.
Please comment on the USRP you are using.
I've cross-posted this to [email protected] [2], since it is
not a GNU Radio error, but a hardware/operating system problem, possibly
something with your Network Card or USB3 host controller (depends on
what device you are using).
Greetings,
Marcus
[1] compare: uhd/host/lib/usrp/common/async_packet_handler.hpp
[2] subscribe on
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
On 25.05.2014 15:46, Mauricio Olivera wrote:
> Hi All,
>
> I am running a program that prints information in console. In one machine I
> am getting a lot of 'SSSSSSS' and gets pretty annoying sometimes.
> I have read that this is related with overrun problem, however the program
> is running correctly.
>
> Is there a way to avoid this?? Can I mask 'S' printing in console from Gnu
> Radio??
>
> greetings.
>
>
>
> _______________________________________________
> Discuss-gnuradio mailing list
> [email protected]
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/attachments/20140525/94f188d7/attachment-0001.html>
------------------------------
Subject: Digest Footer
_______________________________________________
USRP-users mailing list
[email protected]
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
------------------------------
End of USRP-users Digest, Vol 45, Issue 23
******************************************
