d
to Friday afternoon.
Jona
On Dec 5, 2014, at 7:12 PM, Gerry Harp wrote:
Hi Jonathan
This is interesting. Is an inverse PFB is just a PFB using an inverse FFT?
That should be very close by possibly not bit-perfect inversion.
Or are you considering a step-by-step inverse of the PFB algo
Hi Jonathan
This is interesting. Is an inverse PFB is just a PFB using an inverse
FFT? That should be very close by possibly not bit-perfect inversion.
Or are you considering a step-by-step inverse of the PFB algorithm? I'm
interested because there are traps. Small numerical errors are magni
Hi John
If you can sample 800 MHz bandwidth, then can't you use a digitial
bandpass filter to get to the lower bandwidths?
Gerry
On 3/21/2014 11:43 AM, John Ford wrote:
John
We do have switchable analog filters that define the 200, 400 and 800 MHz
bandpasses in our IF processors. So decima
Nice solution, Andrew!
Gerry
On 2/17/2014 11:24 PM, Andrew Martens wrote:
Hi Rolando
Congratulations
How I can confirm that the correlator function properly?
A good way to test a correlator is to do the following;
1. Get a wideband noise source and add a low pass filter so that the
signal
Hi Dan and all
This looks very cool. There is something in the specs I don't understand:
* Analog signal: 50 ohm single-ended configurable as three of:
o 4 inputs at 250 Msps
o 2 inputs at 500 Msps
o 1 input at 1 Gsps
How many analog inputs are there to feed the
will appear in two places in the spectrum,
and the SNR of the signal of interest is degraded...)
best wishes,
dan
On Thu, Jan 23, 2014 at 7:06 PM, Gerry Harp <mailto:gh...@seti.org>> wrote:
FWIW:
We generally pass the real-valued digitized signal through a
Hilbert (?) filter
n you can have more
memory,
but you'll need a lot more CPU's to keep up with the data rate, so CPU's
won't help.
be wary of readout rate too - that's a lot of data to read out :
256M channels x 42^2 baselinepols x 4B = 1 TB every integration
time
best wishes,
da
x27;s
> won't help.
>
> be wary of readout rate too - that's a lot of data to read out :
>
> 256M channels x 42^2 baselinepols x 4B = 1 TB every
integration time
>
>
>
> best wishes,
>
> dan
>
>
>
&g
eed a lot more CPU's to keep up with the data rate, so CPU's
won't help.
be wary of readout rate too - that's a lot of data to read out :
256M channels x 42^2 baselinepols x 4B = 1 TB every integration time
best wishes,
dan
On Mon, Jan 20, 2014 at 7:53 PM, Gerry Har
s
or educated guesses are welcome. Also, how fast did it go? Possible to
keep up with 100 MSPS?
It is proposal time, once more...
Thanks
Gerry Harp
On 1/17/2014 11:56 AM, Dan Werthimer wrote:
Dear Casper Collaborators,
We hope you can attend this year's Casp
Hi David Saroff
As a old/newbie, I'm not fully up on the lingo. Can you break down the
meaning of 64ADC64-12 for me?
64 inputs? 64 outputs? 12 bits?
Thanks
Gerry
On 8/13/2013 1:22 PM, David Saroff wrote:
Folks,
I've discovered that the CASPER tools are picky about versions of matlab,
xili
Hi Ryan
Can you say a few words about how the in-place corner turner works? I'd
be fascinated to hear.
Thanks
Gerry
On 3/1/2013 11:28 AM, David MacMahon wrote:
Thanks, Ryan,
The problem was actually in the integration buffers. We were using QDR vector
accumulators and the vector was too
Hi Jason
Looks like a nice app.
Gerry
On 8/29/2012 8:32 AM, Jason Castro wrote:
This may be helpful to someone. I've written a LabVIEW KATCP -
interface. I attached a screen shot. Like everything, it's a work in
progress, but it has a lot of basic functionality that I find useful.
You c
questions.
Cheers,
Jonathan
On Aug 24, 2012, at 7:07 PM, Gerry Harp wrote:
Hi Dan
Your numbers look somehow backwards.
Did you mean:
32 inputs at 8K
16 at 4K
8 at 2K
4 at 1K?
Presumably, by narrowing the input bandwidth could permit proportionally
smaller channels at the output? So at 2.5 MHz
Hi Dan
Your numbers look somehow backwards.
Did you mean:
32 inputs at 8K
16 at 4K
8 at 2K
4 at 1K?
Presumably, by narrowing the input bandwidth could permit
proportionally smaller channels at the output? So at 2.5 MHz input
one could
Sounds like a good answer.
Gerry
On 5/25/2012 8:10 AM, melvyn wright wrote:
That's a relief .
Mel.
On Fri, May 25, 2012 at 7:37 AM, Aaron Parsons
wrote:
The decision to split the SKA between South Africa and Australia is official:
http://www.skatelescope.org/news/dual-site-agreed-squar
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