hi rolando,

are you dropping packets?

have you used tcpdump or other packet sniffer code (eg: gulp...),
to investigating what's going on when you change the integration time?

is the number of packets/second correct for the integration time you set?
if not, perhaps you accidently changed the sample clock to the adc
so the integration time is shorter than before...

best wishes,

dan



On Mon, Mar 5, 2018 at 3:39 PM, Rolando Paz <[email protected]> wrote:

> Hello
>
> I'm having a problem with my 10G ethernet card (I think)... everything was
> working fine the last year. Yesterday I turned on the ROACH again and now I
> could not get data with the original settings (accumulation length= 256).
> Maybe the drivers of the Myricom 10G-PCIE-8A-C card were updated
> automatically in my ubuntu 16.04LTS :(
>
> These are the original settings:
>
> Notes:
> a) ROACH1 design, 4 inputs with QUADC
> b) "fft_biplex_real_2x" block was used
>
> FFT points (FFT size) = 2048
> Samples per clock = 1
> FFT clock cycles = 2048
> Accumulation Length = 256
> FPGA clock (MHz) = 200
> Integration Time = 0.00262144
>
> But now it only works from:
>
> FFT points (FFT size) = 2048
> Samples per clock = 1
> FFT clock cycles = 2048
> Accumulation Length = 1024
> FPGA clock (MHz) = 200
> Integration Time = 0.01048576
>
> Before I managed to obtain data with a time of integration of 0.00262144,
> and now only from 0.01048576
>
> What could happen?
>
> Regards
>
> Rolando
>
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