experience with
clocking the SNAP. You see, we run a very tight budget and the M500 LANTIME
clock is expensive. We would like to know if there is a less costly way to
clock the SNAP and synchronise several boards.
Thanks.
Best regards,
Nitish Ragoomundun
Department of Physics
University of Mauritius
've only ever used this output for debugging the synthesizer. I
> think python software probably exists to control this output (see
> https://github.com/casper-astro/casperfpga/blob/master/src/synth.py)
> though I don't know how complete it is.
>
> Hope that helps a bit,
>
&g
comparing two sources and plotting the
> Allen Variance. Be careful of low cost GPSDOs as they are designed for NTP
> applications in networks, where 15 ms is all that is required.
>
> We also have a great deal of experience and hardware (with results) of
> using White Rabbit to synch
Hello everyone,
We have a tile of 24 antennas from which we need to acquire data. The
central frequency is
327.4 MHz and our working bandwidth is 250 kHz. We need to convert the 24
analogue
channels to digital. For this we were thinking about 2x SNAP2 boards
operating 12 channels
each at 250
other CASPER users?
>
> If you're looking for information on SNAP1 there are schematics at
> https://casper.berkeley.edu/wiki/SNAP, and pin configurations in
> https://github.com/casper-astro/mlib_devel/blob/master/jasper_library/platforms/snap.yaml
>
> Cheers
> Ja
Hello,
Does anyone have a .xdc file for the SNAP v2 board? With all the
constraints: clocks, pins,
buttons, leds and SDRAM?
It is essential for our work and we haven't been able to find such a file
in the casper-astro repo
on GitHub.
Regards,
Nitish Ragoomundun
University of Mauritius
--
You
on that
>> this is something simple which might have to do with a previous install of
>> the title not being overwritten properly.
>>
>> I'll dig through my notes and get back to you asap
>>
>> Jack
>>
>> On Wed, 20 Nov 2019, 12:02 am Nitish Rago
to read the 3 spectra, each with 2048 complex 64-bit frequency channels,
through the Raspberry Pi itself. The connection did choke once, but ran
correctly after I changed the cable.
Having fun experimenting. ;)
Cheers,
Nitish
On Fri, Oct 11, 2019 at 10:18 PM Nitish Ragoomundun <
nitish.ragoo
Hi,
I read from the SNAP wiki page that we can operate the SNAP board ADCs at
1GSps with 3 channels of input. So, I modified the CASPER SNAP tutorial 3
to make the ADC work at 1GSps to obtain a 1 channel spectrometer with a
spectrum of 500 MHz. First I modified the SNAP User IP Clock Rate to 250
around with the adc's clock termination resistors and
>> clock distribution chip parameters,
>> or use an external dual 1gps zdoc adc.
>>
>> best wishes,
>>
>> dan
>>
>>
>>
>>
>> Dan Werthimer
>> Marilyn and Watson Alberts Chair
>&
in the 64
> bits unchanged.
>
> Hopefully that makes sense
>
> Jack
>
>
> On Tue, 18 Aug 2020 at 13:28, Nitish Ragoomundun <
> nitish.ragoomun...@gmail.com> wrote:
>
>>
>> Hello,
>>
>> We are setting up the digital back-end of a low-fr
Hello,
We are setting up the digital back-end of a low-frequency telescope
consisting of SNAP boards and GPUs. The SNAP boards packetize the data and
send to the GPU processing nodes via 10 GbE links. We are currently
programming the packetizer/depacketizer.
I have a few questions about the 10gbe
ohl or htohs functions to get it in host format. That way the
>>> code stays more portable - if you one day find yourself on a big-endian
>>> system, it would work without modification.
>>> (https://en.wikipedia.org/wiki/Endianness#Networking)
>>>
>>> Sometim
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