RE: ToO for Wednesday (VX017A)
- Contemporary messages sorted: [ by date ] [ by thread ] [ by subject ] [ by author ] [ by messages with attachments ]
From: <John.Reynolds_at_email.protected>
Date: Wed, 29 May 2013 15:57:54 +1000 (EST)
Shinji,
>perhaps for 0.25K noise diode with a 20 Hz modulation?
Sounds good to me. If you've got the option of a bigger diode (1K?) that
might be worth considering as the Tsys on the target is going to be pretty
high.
Cheers,
John R
On Wed, 29 May 2013, Horiuchi, Shinji wrote:
>Hi John and Cormac,
>
>Shall I leave with a noise diode turned on throughout the experiment,
>perhaps for 0.25K noise diode with a 20 Hz modulation?
>
>Cheers,
>Shinji.
>
>-----Original Message-----
>From: John Reynolds [mailto:John.Reynolds_at_csiro.<!--nospam-->au]
>Sent: Wednesday, 29 May 2013 9:57 AM
>To: shinji horiuchi
>Cc: James Lovell; Cormac Reynolds; LBA list observers; Jean-Pierre
>Macquart; Horiuchi, Shinji
>Subject: Re: ToO for Wednesday (VX017A)
>
>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.**V
>X017A<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
>>>>------------------------------**----------------------
>>>>
>>>>
>>
>>
>
>>>
>>
>################################################################
>If you received this email in error, please notify the sender
>immediately and delete the email and attachments. This email may
>contain private or sensitive information. Any forwarding or
>dissemination of information, other than by entities directly
>addressed in this email is prohibited. The views expressed in
>this email do not necessarily reflect the views of CDSCC or its business partners. The organisations accept no
>responsibility for any virus that potentially could be
>transmitted in this email, however all email is scanned prior
>to being transmitted.
>################################################################
>
Received on 2013-05-29 15:57:58
Date: Wed, 29 May 2013 15:57:54 +1000 (EST)
Shinji,
>perhaps for 0.25K noise diode with a 20 Hz modulation?
Sounds good to me. If you've got the option of a bigger diode (1K?) that
might be worth considering as the Tsys on the target is going to be pretty
high.
Cheers,
John R
On Wed, 29 May 2013, Horiuchi, Shinji wrote:
>Hi John and Cormac,
>
>Shall I leave with a noise diode turned on throughout the experiment,
>perhaps for 0.25K noise diode with a 20 Hz modulation?
>
>Cheers,
>Shinji.
>
>-----Original Message-----
>From: John Reynolds [mailto:John.Reynolds_at_csiro.<!--nospam-->au]
>Sent: Wednesday, 29 May 2013 9:57 AM
>To: shinji horiuchi
>Cc: James Lovell; Cormac Reynolds; LBA list observers; Jean-Pierre
>Macquart; Horiuchi, Shinji
>Subject: Re: ToO for Wednesday (VX017A)
>
>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.**V
>X017A<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
>>>>------------------------------**----------------------
>>>>
>>>>
>>
>>
>
>>>
>>
>################################################################
>If you received this email in error, please notify the sender
>immediately and delete the email and attachments. This email may
>contain private or sensitive information. Any forwarding or
>dissemination of information, other than by entities directly
>addressed in this email is prohibited. The views expressed in
>this email do not necessarily reflect the views of CDSCC or its business partners. The organisations accept no
>responsibility for any virus that potentially could be
>transmitted in this email, however all email is scanned prior
>to being transmitted.
>################################################################
>
Received on 2013-05-29 15:57:58