Re: [Discuss-gnuradio] sign_extend.v !!!!

>-Original Message- >From: Josh Blum [mailto:j...@joshknows.com] >Sent: Sunday, March 13, 2011 10:52 PM >To: discuss-gnuradio@gnu.org >Subject: Re: [Discuss-gnuradio] sign_extend.v > >http://en.wikipedia.org/wiki/Sign_extension >On 03/13/2011 07:47 PM, Alaa Salaheldin wrote: >> Ca

[Discuss-gnuradio] Tx timestamping w/C++ & "raw" ethernet driver (i.e., non-UHD)

All, I'm having a problem getting scheduled transmissions to occur when I *think* they should. I am sending out tx packets with: start_of_burst = 1 send_now = 0 end_of_burst = 1 if just 1 packet, else 0 timestamp = "the appropriate value" The timestamp hardware has been configure

Re: [Discuss-gnuradio] UHD Announcement - December 13th 2010 - MIMO cable support

Josh, This is great! Although it goes without saying, I'm assuming users should also need to keep in mind that there's no magic going on here w.r.t. gigE bandwidth (i.e., one U2 running "wide open" can pretty much consume an entire gigE port. Now that you've got 2 U2's sharing a single con

Re: [Discuss-gnuradio] GRC with two URSP2+DBSRX and UHD

>-Original Message- >From: Thomas Hobiger [mailto:hobi...@nict.go.jp] >Sent: Tuesday, November 30, 2010 01:04 AM >To: b...@sigmatix.com >Cc: j...@joshknows.com, discuss-gnuradio@gnu.org >Subject: Re: [Discuss-gnuradio] GRC with two URSP2+DBSRX andUHD > >Hi Bob, >>This is pretty eas

Re: [Discuss-gnuradio] GRC with two URSP2+DBSRX and UHD

Thomas, For this to work, one of the devices should provide its sync to the other device. Unfortunately, this does NOT happen automatically. You need to configure one to drive its (reference) clock over the cable and the other to use the signal provided by the cable. This is pretty easy

[Discuss-gnuradio] USRP2 UART use

We're exploring the possibility of monitoring the overrun/underrun status via the USRP2 UART. I'm curious to learn what approaches people have taken to do this (e.g., connect the UART to a logic analyzer, use a level shifter -> RS232 -> host serial/USB port, etc.). I'd also like to know wha

Re: [Discuss-gnuradio] UHD/antennas/device names/etc.

Josh, Thanks. That makes sense. --Bob >-Original Message- >From: Josh Blum [mailto:j...@joshknows.com] >Sent: Thursday, August 26, 2010 09:43 PM >To: b...@sigmatix.com >Cc: discuss-gnuradio@gnu.org >Subject: Re: [Discuss-gnuradio] UHD/antennas/device names/etc. > >Bob, > >---

Re: [Discuss-gnuradio] UHD/antennas/device names/etc.

Josh, No GRC. All C++. My C++ code is calling simple_usrp::make(dev). --Bob >-Original Message- >From: Josh Blum [mailto:j...@joshknows.com] >Sent: Thursday, August 26, 2010 07:53 PM >To: b...@sigmatix.com >Cc: discuss-gnuradio@gnu.org >Subject: Re: [Discuss-gnuradio] UHD/antennas/de

Re: [Discuss-gnuradio] UHD/antennas/device names/etc.

>-Original Message- >From: Josh Blum [mailto:j...@joshknows.com] >Sent: Thursday, August 26, 2010 07:03 PM >To: discuss-gnuradio@gnu.org >Subject: Re: [Discuss-gnuradio] UHD/antennas/device names/etc. > > > >On 08/26/2010 03:27 PM, b...@sigmatix.com wrote: >> Welcome to the next level... >

[Discuss-gnuradio] UHD/antennas/device names/etc.

Welcome to the next level... I've gotten further. It's now failing with: Oterminate called after throwing an instance of 'uhd::assert_error' what(): assertion failed: is not a valid rfx rx antenna name. possible values are: [TX/RX, RX2]. I'm running with an RFX2400 (WBX will be my next

Re: [Discuss-gnuradio] UHD bringup help

Josh, I did the firmware/FPGA image. That appeared to go well. Your first suggestion (net configuration) was the culprit. An ifconfig command with the appropriate parameters appears to have done the trick (now I can see the device using uhd_find_devices (no args)). Thanks much, --Bob

Re: [Discuss-gnuradio] UHD bringup help

Philip, Thanks, but that didn't seem to help, still getting the same thing. Disabled firewall via Linux GUI (System:Administration:Firewall) (says "Firewall is disabled" (in red) at the bottom of the panel). --Bob >-Original Message- >From: Philip Balister [mailto:phi...@balister

[Discuss-gnuradio] UHD bringup help

We've decided it's time to "bite the bullet" and try migrating to UHD. I flashed a couple of SD cards with the latest image (UHD-images-20100817.012137.230368d-Linux). That seemed to go well. Then I booted up 2 U2's... I got 3 LEDS on (B, D & F) + I didn't notice all the LEDs coming on at firs

[Discuss-gnuradio] Synchronizing 2 Usrp2's via MIMO cable?

We need to synch up multiple U2's. I've seen reference to using the MIMO cable to sync 2 U2s. Is this currently supported by the existing software? If so, what do I need to do in my own code in order to affect a sync? Would the same code work with a GPSDO (e.g., Jackson Labs FireFly (which I'

[Discuss-gnuradio] transceiver card soldering chemistry?

I need to get some mods made to a couple of transceiver cards (RFX2400s) and was asked by the person doing the work whether the boards were built with leaded or unleaded solder. I didn't know and don't know how to determine this either without asking (or perhaps having access to a gas spectrome

Re: [Discuss-gnuradio] WBX

Actually, I was looking for 500 MHz at the low end, but I think you answered my question. >-Original Message- >From: Matt Ettus [mailto:m...@ettus.com] >Sent: Thursday, January 14, 2010 07:13 PM >To: b...@sigmatix.com, discuss-gnuradio@gnu.org >Subject: Re: [Discuss-gnuradio] WBX > > >No,

Re: [Discuss-gnuradio] WBX

Any possibility an update to the LP0926 to correspond with the new WBX? Say extend the range down a few hundred MHz (LP0526)? >-Original Message- >From: Matt Ettus [mailto:m...@ettus.com] >Sent: Wednesday, January 13, 2010 02:42 PM >To: discuss-gnuradio@gnu.org >Subject: [Discuss-gnuradi