March 28, 2018 2:45:24 PM
To: discuss-gnuradio@gnu.org; Bakshi, Arjun
Subject: Re: [Discuss-gnuradio] Dropping samples "D" when CPU at 60%
Regarding your flow graphs:
energy_det:
###
Moving average
==
Your Decimating FIR is really just a moving average. Try that bloc
Hi all,
I have written a block in python to detect and decode some packet
transmissions. I've noticed that when I have 3 rx streams running at 6.25Msps
(total network traffic is 75MB/s), the host starts dropping samples after a
while. The CPU utilization does not exceed 60%, and the Ethernet
I get this error when trying to open 2 tx steams and 3 rx streams, where some
usrps are both rx and tx: "RuntimeError: fifo ctrl timed out looking for acks"
I found a mention of the error on this page:
http://www.ni.com/product-documentation/53455/en/
Which gives a workaround: Open an Rx and
Thank you,
AB
____
From: Bakshi, Arjun
Sent: Saturday, November 25, 2017 10:40:54 PM
To: John Shields; discuss-gnuradio@gnu.org; usrp-us...@lists.ettus.com
Subject: Re: [USRP-users] Phase sync with different frequencies
Hi John,
Thanks for the reply. In my setup
<john.shie...@xtra.co.nz>
Sent: Saturday, November 25, 2017 10:07:14 PM
To: Bakshi, Arjun; discuss-gnuradio@gnu.org; usrp-us...@lists.ettus.com
Subject: Re: [USRP-users] Phase sync with different frequencies
Hi Arjun,
You mention that you have both units connected to ‘external PPS
Hi all,
I'd like to use the phase resync freature on the SBX to get reliable phase
alignment in the following setup:
link_freq1 = USRP-A TX @ Freq1 ---> USRP-B RX @ Freq1
link_freq2 = USRP-B TX @ Freq2 ---> USRP-A RX @ Freq2
Where link_freq1 should always have phase X, and link_freq2 should
:17 PM
To: Bakshi, Arjun
Cc: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] X310 with 2 WBX in full duplex
I've had this error before, can't recall the solution however one thing to try
is setting the DDC block select parameters. On the upper DDC block set block
select to 0 and on the low
Thanks for the pointers. I'll look into them soon. I've temporarily moved to
another setup. Will report back when I come back the this one.
Thanks,
AB
From: Michael Carosino <m.caros...@gmail.com>
Sent: Friday, November 3, 2017 3:38:37 PM
To: Bakshi, Ar
Done: https://github.com/gnuradio/gnuradio/issues/1511
Thank you,
AB
From: Andrej Rode <m...@andrejro.de>
Sent: Friday, November 3, 2017 5:56:49 PM
To: Bakshi, Arjun
Cc: discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] Overlapping blocks and wir
Few mistakes I caught after sending it. Center frequencies I had chosen were
out of range for WBX. Fixed now. Also, image file now has proper extension.
Thank you,
AB
From: Bakshi, Arjun
Sent: Thursday, November 2, 2017 9:38:48 PM
To: discuss-gnuradio@gnu.org
Hi,
I'm trying to get two Tx-Rx links running with an X310 with two WBX
daughterboards in it. I've used multi-channel USRP source/sink blocks, but I'm
experiencing latency (L) errors with the connection, and then the application
(GRC) hangs. I've attached an image of my USRP source/sink
Not sure if this is the right place, but a couple of annoying behaviors of GRC.
Often times when one adds a block to the flowgraph in GR, it'll go over a wire
or under another block.
When it goes over a wire, often times clicking on the block will select the
wire underneath it, and move or
has significant
power. I want the received signal to be between only the TX antenna and RX
antenna. I'm limited in my ability to further separate things.
Thanks,
AB
From: Bakshi, Arjun
Sent: Thursday, October 26, 2017 1:45 AM
To: discuss-gnuradio@gnu.org
I'd like to make a shield for my usrps. I have a significant direct path from
the transmitting antenna to the receiving usrp case. I want to eliminate this
path and receive only from the rx antenna.
Are there any hacks I can use to make a makeshift rf shield for my usrps?
Thanks,
AB
Hi all,
I'd like to know the source of the value used for event_time in gr-eventstream.
Is it the time at the USRP? If I give 2 USRPs the same time source, and then
they see the same event, will the same time show up on both streams?
I've attached a screen-shot of a part of the flow I use,
Hi all,
I'm writing an OOT block in python which has multiple output streams. I know I
can use consume(stream_index, amount_consumed) to tell the scheduler/system how
much has been consumed on a specific INput stream. But how do I notify that X
amount has been produced for OUTput stream 1, Y
othing by calling "return 0".
Regards,
AB
________
From: Bakshi, Arjun
Sent: Thursday, July 13, 2017 2:48 PM
To: discuss-gnuradio@gnu.org; t_whit...@yahoo.com
Subject: Re: [Discuss-gnuradio] OOT Block to Automatically adjust Transmit Gain
Couldn't figure o
Couldn't figure out how to reply from the digest, so I'm making a new post. New
to this.
Original message/context:
==
From: Tellrell White
I'm currently in the process of creating a block in python that does two
things; takes in? a certain number of input items,
you for the quick response!
AB
From: Michael Dickens <michael.dick...@ettus.com>
Sent: Thursday, July 13, 2017 10:24:06 AM
To: Bakshi, Arjun; discuss-gnuradio@gnu.org
Subject: Re: [Discuss-gnuradio] Understanding produce, consume, and data streams
Hi AB
Hi all,
Apologies for a possible duplicate message.
I've made a few OOT blocks and thought I had a handle on the process but I've
found something that I don't understand. I have a general block that "passes"
the input to the output stream. However, instead of doing something like:
out[:] =
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