Re: Radio Astron VLBI
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From: <Chris.Phillips_at_email.protected>
Date: Tue, 9 Apr 2013 00:01:27 +0000
Hi Stuart,
Are you able to repeat this but put the tone and the band 1/4 point (ie 4 MHz from band edge). A tone at band centre does not confirm the USB/LSB of the band.
Cheers
Chris
On 09/04/2013, at 9:10 AM, Stuart Weston wrote:
>I have this morning sent test tones.
>
>I see peaks in bands where I expect.
>
>Tone: 1660GHz, I see in Chls 2 & 4 in centre of band
>Tone: 1676GHz, I see in Chls 1 & 3 in centre of band
>
>There appears to be some leakage integrating for ~10s:
>
>For 1660 I see a small peak in Chl 1
>For 1676 I see a v.small peak in Chl 2
>
>I have a tone of ~8db. Drop the tone to 5db and no leakage/peak in other bands as above for 10s integration.
>
>Stuart Weston
>
>
>Mobile: 021 713062
>
>Skype: stuart.d.weston
>Email: stuart.weston_at_aut.<!--nospam-->ac.nz
>
>http://www.atnf.csiro.au/people/Stuart.Weston/index.html
>
>Software Engineer
>Institute for Radio Astronomy & Space Research (IRASR)
>School of Computing & Mathematical Sciences
>Faculty of Creative Technologies
>Auckland University of Technology, New Zealand.
>
>http://www.irasr.aut.ac.nz/
>
>From: Hayley Bignall [hbignall_at_gmail.<!--nospam-->com]
>Sent: 08 April 2013 19:40
>To: Dr Michael Bietenholz
>Cc: Chris Phillips; VLBI observers; Jamie McCallum; Stuart Weston; Tim Natusch
>Subject: Re: Radio Astron VLBI
>
>Hi guys,
>
>It occurred to me that I could have added a file grab for fringe check to the main schedule as well.. I haven't done this but possibly could still do it for Hart tonight. Especially as Hart has one (ten minute) scan with ATCA and Hobart at 18:50, then a long gap before the spacecraft segment at 19:20 UT.
>
>Anyway let's see how the fringe test goes I guess..
>
>Cheers,
>
>Hayley
>
>
>
>On 8 April 2013 15:12, Dr Michael Bietenholz <michael_at_hartrao.<!--nospam-->ac.za> wrote:
>Hi Chris
>
>
>Sorry gusy, I may have screwed up the fringe check at Hart - I
>mistakenly loaded the main schedule (rather than the fringe-check one),
>and then noticed that nothing was happening for 6 hours
>so I figured it out and loaded the fringe-check schedule. However,
>I realize now that I never loaded the fringe check *proc* file,
>so the Hart setup may have been wrong.
>
>I did load the right procedure & schedule for the actual run later
>on yesterday.
>
>michael
>
>>> On 8 April 2013 12:23, <Chris.Phillips_at_csiro.<!--nospam-->au> wrote:
>>>
>>>>> Hi Guys
>>>>>
>>>>> I have looked more at last nights data - I still cannot get fringes to
>>>>> Ww,Hobart,Hart or ATCA at C-band. Either the setup is not what I expect
>>>>> or
>>>>> something is seriously wrong at lots ok the observatories.
>>>>>
>>>>> For those you can please before the fringe test tonight try turning on a
>>>>> test tone and record some data and verify it appears where you expect.
>>>>> Best
>>>>> to try a tone at a few difference frequencies at different locations
>>>>> within
>>>>> the bands.
>>>>>
>>>>> Also check formatter time offsets etc.
>>>>>
>>>>> Cheers
>>>>> Chris
>>>>>
>>>>>
>>>
>
>
>
>
Received on 2013-04-09 10:03:09
Date: Tue, 9 Apr 2013 00:01:27 +0000
Hi Stuart,
Are you able to repeat this but put the tone and the band 1/4 point (ie 4 MHz from band edge). A tone at band centre does not confirm the USB/LSB of the band.
Cheers
Chris
On 09/04/2013, at 9:10 AM, Stuart Weston wrote:
>I have this morning sent test tones.
>
>I see peaks in bands where I expect.
>
>Tone: 1660GHz, I see in Chls 2 & 4 in centre of band
>Tone: 1676GHz, I see in Chls 1 & 3 in centre of band
>
>There appears to be some leakage integrating for ~10s:
>
>For 1660 I see a small peak in Chl 1
>For 1676 I see a v.small peak in Chl 2
>
>I have a tone of ~8db. Drop the tone to 5db and no leakage/peak in other bands as above for 10s integration.
>
>Stuart Weston
>
>
>Mobile: 021 713062
>
>Skype: stuart.d.weston
>Email: stuart.weston_at_aut.<!--nospam-->ac.nz
>
>http://www.atnf.csiro.au/people/Stuart.Weston/index.html
>
>Software Engineer
>Institute for Radio Astronomy & Space Research (IRASR)
>School of Computing & Mathematical Sciences
>Faculty of Creative Technologies
>Auckland University of Technology, New Zealand.
>
>http://www.irasr.aut.ac.nz/
>
>From: Hayley Bignall [hbignall_at_gmail.<!--nospam-->com]
>Sent: 08 April 2013 19:40
>To: Dr Michael Bietenholz
>Cc: Chris Phillips; VLBI observers; Jamie McCallum; Stuart Weston; Tim Natusch
>Subject: Re: Radio Astron VLBI
>
>Hi guys,
>
>It occurred to me that I could have added a file grab for fringe check to the main schedule as well.. I haven't done this but possibly could still do it for Hart tonight. Especially as Hart has one (ten minute) scan with ATCA and Hobart at 18:50, then a long gap before the spacecraft segment at 19:20 UT.
>
>Anyway let's see how the fringe test goes I guess..
>
>Cheers,
>
>Hayley
>
>
>
>On 8 April 2013 15:12, Dr Michael Bietenholz <michael_at_hartrao.<!--nospam-->ac.za> wrote:
>Hi Chris
>
>
>Sorry gusy, I may have screwed up the fringe check at Hart - I
>mistakenly loaded the main schedule (rather than the fringe-check one),
>and then noticed that nothing was happening for 6 hours
>so I figured it out and loaded the fringe-check schedule. However,
>I realize now that I never loaded the fringe check *proc* file,
>so the Hart setup may have been wrong.
>
>I did load the right procedure & schedule for the actual run later
>on yesterday.
>
>michael
>
>>> On 8 April 2013 12:23, <Chris.Phillips_at_csiro.<!--nospam-->au> wrote:
>>>
>>>>> Hi Guys
>>>>>
>>>>> I have looked more at last nights data - I still cannot get fringes to
>>>>> Ww,Hobart,Hart or ATCA at C-band. Either the setup is not what I expect
>>>>> or
>>>>> something is seriously wrong at lots ok the observatories.
>>>>>
>>>>> For those you can please before the fringe test tonight try turning on a
>>>>> test tone and record some data and verify it appears where you expect.
>>>>> Best
>>>>> to try a tone at a few difference frequencies at different locations
>>>>> within
>>>>> the bands.
>>>>>
>>>>> Also check formatter time offsets etc.
>>>>>
>>>>> Cheers
>>>>> Chris
>>>>>
>>>>>
>>>
>
>
>
>
Received on 2013-04-09 10:03:09