Hi Sharat,

How recent is your checkout of that library? What does git tell you is the
most recent commit?
Can you also send me a copy of your model and boffile -- i'll test that the
calibration script works.

Cheers,
Jack


On 3 September 2015 at 22:46, sharat varma <va...@hku.hk> wrote:

> Hi Jack,
>
> Thank you Jack.
> I am using the mlib-devel from https://github.com/sma-wideband/mlib_devel
> Also, I am using ISE 14.7.
>
> Regards,
> Sharat
>
> On 4 September 2015 at 12:34, Jack Hickish <jackhick...@gmail.com> wrote:
>
>> Hi Sharat,
>>
>> Tomorrow (in California) I'll send you a link and instructions to use the
>> calibration script I have, which should work ok at 2500mhz clock.
>>
>> In the meantime, it might not matter, but what version of mlib-devel are
>> you using?
>>
>> Cheers,
>> Jack
>>
>> On Thu, 3 Sep 2015 9:02 pm sharat varma <va...@hku.hk> wrote:
>>
>>> Hi,
>>>
>>> Thanks for the reply and sorry for the delayed response.
>>> Yes, the x-axis represent the time and y-axis represents the signed 8
>>> bit output. The negative bias is due to the nature of the input.
>>>
>>> I was trying to use the files in the link you mentioned, but I keep
>>> getting the error shown below. I am using the bof file provided for roach2.
>>>
>>> test roach connectivity ... ok
>>> check if requested bof is available ... ok
>>> test roach pingability ... ok
>>> program the requested bof ... ok
>>> estimate clock rate, should be within 1 MHz of expected ... ok
>>> confirm the design has the ADC SPI controller ... ok
>>> confirm the design has the needed scope ... ok
>>> test if calibration finds optimal MMCM phase ... FAIL
>>>
>>> ======================================================================
>>> FAIL: test if calibration finds optimal MMCM phase
>>> ----------------------------------------------------------------------
>>> Traceback (most recent call last):
>>>   File "test_adc5g.py", line 107, in test_optimal_solution_found
>>>     self.assertIsNotNone(self._optimal_phase)
>>> AssertionError: unexpectedly None
>>>
>>> ----------------------------------------------------------------------
>>> Ran 8 tests in 7.230s
>>>
>>> FAILED (failures=1)
>>>
>>> Please let me know if I am doing anything wrong or where could be the
>>> problem.
>>>
>>> For your information:
>>>
>>> System: roach2
>>>
>>> ADC :  ASIAA ADC5G ADC
>>>
>>> Clock : 2500MHz.
>>>
>>> Thanks and regards,
>>>
>>> Sharat
>>>
>>>
>>> On 1 September 2015 at 23:01, Primiani, Rurik <rprimi...@cfa.harvard.edu
>>> > wrote:
>>>
>>>> Hi Sharat,
>>>>
>>>> The plot you provided has no labels or units so I will assume the
>>>> x-axis represents time in samples and the y-axis represents signed 8-bit
>>>> sample values. I'm not sure why there is such a negative bias but perhaps
>>>> that's particular to your instrument.
>>>>
>>>> Please, at the very least, run the MMCM calibration described at
>>>> https://github.com/sma-wideband/adc_tests to reduce glitches on the
>>>> interface. I believe Jack also has a more sophisticated approach which
>>>> adjusts the IODELAY for each individual data line; sadly I don't have a
>>>> link handy for that.
>>>>
>>>> Although you may not see these glitches with a sine wave, a noise-like
>>>> signal will cause more transitions on each bit and thus more glitches with
>>>> an uncalibrated interface.
>>>>
>>>> Thanks,
>>>> Rurik
>>>>
>>>>
>>>>
>>>> On Tue, Sep 1, 2015 at 2:54 AM, sharat varma <va...@hku.hk> wrote:
>>>>
>>>>> Hi Jack,
>>>>>
>>>>> Thanks for the reply.
>>>>>
>>>>> I did not run mmcm calibration. Actually, we checked the ADC by
>>>>> feeding it a low frequency sine wave from a function generator and it 
>>>>> works
>>>>> fine.
>>>>>
>>>>> The problem with spikes occurs when we feed the ADC with the
>>>>> photo-detector output.
>>>>>
>>>>> Regards,
>>>>> Sharat
>>>>>
>>>>>
>>>>> On 1 September 2015 at 13:52, Jack Hickish <jackhick...@gmail.com>
>>>>> wrote:
>>>>>
>>>>>> Hi Sharat,
>>>>>>
>>>>>> Are you running the adc mmcm calibration routine after programming
>>>>>> your roach?
>>>>>>
>>>>>> Cheers,
>>>>>> Jack
>>>>>>
>>>>>> On 31 August 2015 at 22:41, sharat varma <va...@hku.hk> wrote:
>>>>>>
>>>>>>>
>>>>>>> Hi Casper,
>>>>>>>
>>>>>>> I am working as a post-doc working under guidance of Dr. Hayden So
>>>>>>> at The University of Hong Kong.
>>>>>>>
>>>>>>> We are using ROACH2 to capture data from optical cytometry. We are
>>>>>>> using  ASIAA ADC5G ADC to capture data at 4 to 5 Gsps.
>>>>>>>
>>>>>>> We basically use the following parameters.
>>>>>>>
>>>>>>> Block parameter: two-channel, ZDOK0, demux 1:1 .
>>>>>>> System: roach2, clock source:adc0_clk, clock rate: 300 MHz.
>>>>>>>
>>>>>>> We are connecting the output of a photo-detector 1544-B from Newport
>>>>>>> Corp (the spec is attached) to the ADC input using SMA.
>>>>>>> We find that noisy spikes are introduced when we capture the data
>>>>>>> through the ADC (see attached fig). We double checked if the source had
>>>>>>> problems using a oscilloscope, but on the oscilloscope we do not see 
>>>>>>> any of
>>>>>>> these spikes.
>>>>>>>
>>>>>>> We would be grateful if you could let us know if we are doing
>>>>>>> anything wrong.
>>>>>>>
>>>>>>>  Rgards,
>>>>>>> Sharat
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>
>

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