Ryan Monroe wrote:
> I'm trying to interleave two 3GSPS iADCs (083000s). While I have the
> gain and offset working properly, whenever I try and adjust the phase,
> ADC1 starts going haywire (random phase offset, noise occasionally
> added to signal, etc). Subsequently turning off the phase adju
Hey all, I'm trying to interleave two 3GSPS iADCs (083000s). While I have the
gain and offset working properly, whenever I try and adjust the phase, ADC1
starts going haywire (random phase offset, noise occasionally added to signal,
etc). Subsequently turning off the phase adjust bit in the coar
John / etc:
The data rate is about 75kbytes/sec per board. The previous number I
(mis-)quoted was the total data rate: about 1.2mbytes/sec.
So, what I'm taking away is that I want a buffer of the order of
several hundred milliseconds so that the port connected to my linux
box has enough buffer. I
Jason:
This all looks familiar to this old hand, but it's been a while. So
let me ask some dumb questions and get the solution explicit. Your
suggestion is to put those configuration options in, say,
/etc/rc.local with the caveats below?
1. sysctl -w before each option
2. tuned to the actual amou
Hi John,
On Mon, 20 Jun 2011, John Ford wrote:
If you try to toss these packets over the internet or through routers, you
may be sunk. But you should be able to do fine if you control the
switches and host adapters.
Actually this is not true.
We demonstrated 8 Gbps over Internet a few years
PAPER do this very thing with a 48-port Netgear GS748TAU. I usually use packets
with payload of 4096 or 8192 bytes, along with a small header. Up to 9kB should
be fine on just about any 1GbE switch these days.
Remember that you can't have jumbo packets on 100mbps Ethernet. So if any of
the traf
Hi Tom,
We have been working with udp.
Basic problem is that the low-cost routers have too little memory, common
wisdom is that they should have 100-200 milliseconds worth.
This is for aggregation of data.
Packet size will be noticeable only above 2-4 Gbps, Myrinet webpages are a
good startin
Hi Tom.
Most newer switches support jumbo frames, and most support ~9000 byte
packets. I say most because you just have to look at the feature set in
the data sheet. Some of the inexpensive Netgear 5,8, and 16 port switches
support a packet size of from 9000 to 10240. Another problem might be t
Casper folks:
I've finally started working in earnest on a PPC-side C server that
reads out FPGA/PPC shared memory and sends out UDP packets over the
1Gbe interface. The idea being that our data rate is so much below
10GBe (about 1 megabyte per second per board) that it did not merit
investing in
Patrick Brandt wrote:
Hi everyone,
I've created a linux-compatible interface to the Valon 5007
synthesizer. This library attempts to provide all the capabilities of
the Windows program created by Valon. At the moment it is a
programmatic interface only (non-graphical) available in Python an
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