Re: ToO for Wednesday (VX017A)
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From: <John.Reynolds_at_email.protected>
Date: Wed, 29 May 2013 09:57:01 +1000 (EST)
Shinji,
>By the way, do we turn off the automatic gain control on DAS for this
>experiment?
I would say leave AGC and thresholds running as normal. Otherwise it will
become even more difficult to manage the difference in levels between the
target and the cals.
In any case the ToO proposal appears to discount the possibility of a
pulsed signal being detectable at this frequency so I assume there'd be no
interest in disabling these loops.
Cheer,s
John R
On Wed, 29 May 2013, shinji horiuchi wrote:
>By the way, do we turn off the automatic gain control on DAS for this
>experiment?
>
>Cheers,
>Shinji.
>
>
>On 28 May 2013 16:40, shinji horiuchi <shoriuch_at_gmail.<!--nospam-->com> wrote:
>
>>Cormac,
>>
>>I guess SgrA* at L-band is still weaker than ambient load. DAS for 64MHz
>>profile for L-Band looks fine with the level between sky and ambient load.
>>
>>As I told you in the separate email, 70m is only available for limited
>>time, i.e. 10:00-13:00 and 17:45-19:30, we should take some lisk for Tid.
>>The antenna is yet to return to be operational and I won't be onsite to run
>>this, leaving Phil Pope in ops team to run this.
>>
>>Cheers,
>>Shinji.
>>
>>
>>On 28 May 2013 15:50, John Reynolds <John.Reynolds_at_csiro.<!--nospam-->au> wrote:
>>
>>>Shinji,
>>>
>>>
>>>I would just play with manual attenuators to get the signal within the
>>>>right range.
>>>>
>>>
>>>That could be twice every 6 minutes, as we switch between the pulsar and
>>>the cal. Be nice to have some help if you're doing this.
>>>
>>>On the other hand the DAS might just be able to cope with the range,
>>>though SgrA* is the strongest source in the sky other than the Sun so I'm
>>>guessing maybe not.
>>>
>>>Cheers,
>>>John R
>>>
>>>
>>>On Tue, 28 May 2013, shinji horiuchi wrote:
>>>
>>>I would just play with manual attenuators to get the signal within the
>>>>right range.
>>>>
>>>>Cheers,
>>>>Shinji.
>>>>
>>>>
>>>>On 28 May 2013 14:27, James Lovell <Jim.Lovell_at_utas.<!--nospam-->edu.au> wrote:
>>>>
>>>>Some programmable attenuators would be nice at Tid. There were some
>ready
>to install when I was there. Leigh Cameron even got them working but
>they
>caused RFI (or something) so had to be removed.
>
>Maybe if Shinji could plumb the signal though the MkIV rack as this has
>programmable attenuators that can be controlled from the Field System.
>
>Or perhaps better to record to Mark5 and have a couple of extra
>procedures
>that are called after source changes to adjust the attenuation? Then no
>re-wiring is needed.
>
>Cheers,
>Jim
>
>
>
>
>On 28/05/2013, at 2:14 PM, John Reynolds <John.Reynolds_at_csiro.<!--nospam-->au>
>wrote:
>
>Cormac,
>>
>>some Tid time has just become available for vx017a, so I have updated
>>>
>>
>>Should be fun maintaining acceptable levels when switching on and off
>>
>SgrA, something that promises to be interesting at Parkes as well.
>
>>
>>Cheers,
>>John R
>>
>>On Tue, 28 May 2013, Cormac Reynolds wrote:
>>
>>hi,
>>>
>>>some Tid time has just become available for vx017a, so I have updated
>>>the schedule (and redistributed). Please make sure you are using the
>>>vex file with 'PI revision number: 2.0'. Some of the scan timings have
>>>changed to incorporate the slower moving antenna.
>>>
>>>thanks,
>>>Cormac.
>>>
>>>On 27 May 2013 18:40, Cormac Reynolds <c.reynolds_at_curtin.<!--nospam-->edu.au>
>>>wrote:
>>>
>>>>hi all,
>>>>
>>>>I have created a schedule for Wednesday's LBA ToO. Schedules have
>>>>been
>>>>distributed to the telescopes and the wiki pages are in place:
>>>>http://www.atnf.csiro.au/vlbi/**wiki/index.php?n=LBAMay2013.**VX017A<http://www.atnf.csiro.au/vlbi/wiki/index.php?n=LBAMay2013.VX017A>
>>>>
>>>>Regards,
>>>>Cormac
>>>>
>>>>--
>>>>------------------------------**----------------------
>>>>Cormac Reynolds
>>>>Phone: +61 8 9266 3785
>>>>Fax: +61 8 9266 9110
>>>>email: c.reynolds_at_curtin.<!--nospam-->edu.au
>>>>------------------------------**----------------------
>>>>
>>>
>>>
>>>
>>>--
>>>------------------------------**----------------------
>>>Cormac Reynolds
>>>Phone: +61 8 9266 3785
>>>Fax: +61 8 9266 9110
>>>email: c.reynolds_at_curtin.<!--nospam-->edu.au
>>>------------------------------**----------------------
>>>
>>>
>
>
>>>>
>>
>
Received on 2013-05-29 09:57:06
Date: Wed, 29 May 2013 09:57:01 +1000 (EST)
Shinji,
>By the way, do we turn off the automatic gain control on DAS for this
>experiment?
I would say leave AGC and thresholds running as normal. Otherwise it will
become even more difficult to manage the difference in levels between the
target and the cals.
In any case the ToO proposal appears to discount the possibility of a
pulsed signal being detectable at this frequency so I assume there'd be no
interest in disabling these loops.
Cheer,s
John R
On Wed, 29 May 2013, shinji horiuchi wrote:
>By the way, do we turn off the automatic gain control on DAS for this
>experiment?
>
>Cheers,
>Shinji.
>
>
>On 28 May 2013 16:40, shinji horiuchi <shoriuch_at_gmail.<!--nospam-->com> wrote:
>
>>Cormac,
>>
>>I guess SgrA* at L-band is still weaker than ambient load. DAS for 64MHz
>>profile for L-Band looks fine with the level between sky and ambient load.
>>
>>As I told you in the separate email, 70m is only available for limited
>>time, i.e. 10:00-13:00 and 17:45-19:30, we should take some lisk for Tid.
>>The antenna is yet to return to be operational and I won't be onsite to run
>>this, leaving Phil Pope in ops team to run this.
>>
>>Cheers,
>>Shinji.
>>
>>
>>On 28 May 2013 15:50, John Reynolds <John.Reynolds_at_csiro.<!--nospam-->au> wrote:
>>
>>>Shinji,
>>>
>>>
>>>I would just play with manual attenuators to get the signal within the
>>>>right range.
>>>>
>>>
>>>That could be twice every 6 minutes, as we switch between the pulsar and
>>>the cal. Be nice to have some help if you're doing this.
>>>
>>>On the other hand the DAS might just be able to cope with the range,
>>>though SgrA* is the strongest source in the sky other than the Sun so I'm
>>>guessing maybe not.
>>>
>>>Cheers,
>>>John R
>>>
>>>
>>>On Tue, 28 May 2013, shinji horiuchi wrote:
>>>
>>>I would just play with manual attenuators to get the signal within the
>>>>right range.
>>>>
>>>>Cheers,
>>>>Shinji.
>>>>
>>>>
>>>>On 28 May 2013 14:27, James Lovell <Jim.Lovell_at_utas.<!--nospam-->edu.au> wrote:
>>>>
>>>>Some programmable attenuators would be nice at Tid. There were some
>ready
>to install when I was there. Leigh Cameron even got them working but
>they
>caused RFI (or something) so had to be removed.
>
>Maybe if Shinji could plumb the signal though the MkIV rack as this has
>programmable attenuators that can be controlled from the Field System.
>
>Or perhaps better to record to Mark5 and have a couple of extra
>procedures
>that are called after source changes to adjust the attenuation? Then no
>re-wiring is needed.
>
>Cheers,
>Jim
>
>
>
>
>On 28/05/2013, at 2:14 PM, John Reynolds <John.Reynolds_at_csiro.<!--nospam-->au>
>wrote:
>
>Cormac,
>>
>>some Tid time has just become available for vx017a, so I have updated
>>>
>>
>>Should be fun maintaining acceptable levels when switching on and off
>>
>SgrA, something that promises to be interesting at Parkes as well.
>
>>
>>Cheers,
>>John R
>>
>>On Tue, 28 May 2013, Cormac Reynolds wrote:
>>
>>hi,
>>>
>>>some Tid time has just become available for vx017a, so I have updated
>>>the schedule (and redistributed). Please make sure you are using the
>>>vex file with 'PI revision number: 2.0'. Some of the scan timings have
>>>changed to incorporate the slower moving antenna.
>>>
>>>thanks,
>>>Cormac.
>>>
>>>On 27 May 2013 18:40, Cormac Reynolds <c.reynolds_at_curtin.<!--nospam-->edu.au>
>>>wrote:
>>>
>>>>hi all,
>>>>
>>>>I have created a schedule for Wednesday's LBA ToO. Schedules have
>>>>been
>>>>distributed to the telescopes and the wiki pages are in place:
>>>>http://www.atnf.csiro.au/vlbi/**wiki/index.php?n=LBAMay2013.**VX017A<http://www.atnf.csiro.au/vlbi/wiki/index.php?n=LBAMay2013.VX017A>
>>>>
>>>>Regards,
>>>>Cormac
>>>>
>>>>--
>>>>------------------------------**----------------------
>>>>Cormac Reynolds
>>>>Phone: +61 8 9266 3785
>>>>Fax: +61 8 9266 9110
>>>>email: c.reynolds_at_curtin.<!--nospam-->edu.au
>>>>------------------------------**----------------------
>>>>
>>>
>>>
>>>
>>>--
>>>------------------------------**----------------------
>>>Cormac Reynolds
>>>Phone: +61 8 9266 3785
>>>Fax: +61 8 9266 9110
>>>email: c.reynolds_at_curtin.<!--nospam-->edu.au
>>>------------------------------**----------------------
>>>
>>>
>
>
>>>>
>>
>
Received on 2013-05-29 09:57:06