[GMVAtech 45] Re: modifed LO setting for MK018

[Thomas Krichbaum]

Hi Juha,

I refer back to Helge. On the GMVA webside (which is a bit old) we have
some numbers:

https://www3.mpifr-bonn.mpg.de/div/vlbi/globalmm/tech.html

84-95 GHz is available at Ef, Pv, Ys
80-95 GHz for VLBA

best Thomas


On 2020-09-11 12:18, Juha Kallunki wrote:
> Hi Thomas,
> 
> One more questions, other stations have tunable (remotely) LO? Do you know what are their tuning range?
> 
> All the best,
> Juha
> 
> 
>> Juha Kallunki <juha.kallunki at aalto.fi> kirjoitti 10.9.2020 kello 13.51:
>>
>> Hi Thomas,
>>
>> Yes, we can participate to regular sessions (85500 MHz) us usual.
>>
>> All the best,
>> Juha
>>
>>
>>> Thomas Krichbaum <tkrichbaum at mpifr-bonn.mpg.de> kirjoitti 10.9.2020 kello 13.45:
>>>
>>> Hi Juha,
>>>
>>>
>>>
>>> ok, I understand.
>>>
>>> So Mh cannot participate in this particular experiment. I will tell
>>> Eduardo, to remove Mh from MK018.
>>>
>>> https://www3.mpifr-bonn.mpg.de/div/vlbi/globalmm/sessions/oct20/MMschedule.asc
>>>
>>> I presume that Mh is available for the other GMVA experiments (which all
>>> use 85500). Correct ?
>>>
>>> best Thomas
>>>
>>> On 2020-09-10 12:38, Juha Kallunki wrote:
>>>> Hi Thomas,
>>>>
>>>> We will investigate this. Some lab test should be made before we can say exact numbers. Unfortunately, we have to operate next session with this fixed LO (85500 MHz).
>>>>
>>>> As a head of our technical team, I can say that all our technical resources are still next three to four months reserved for our observatory renovation project. In Spring, we will have more time for receivers.
>>>>
>>>> All the best,
>>>> Juha
>>>>
>>>>
>>>>
>>>>> Thomas Krichbaum <tkrichbaum at mpifr-bonn.mpg.de> kirjoitti 10.9.2020 kello 12.21:
>>>>>
>>>>> Hi Juha,
>>>>>
>>>>> could you talk to your technical people to find out over which range the
>>>>> LO can be tuned? I do expect that in the future the GMVA may get more
>>>>> requests on spectral line VLBI.
>>>>>
>>>>> best Thomas
>>>>>
>>>>> On 2020-09-09 21:08, Juha Kallunki wrote:
>>>>>> Hi Thomas and Helge,
>>>>>>
>>>>>> Our (Metsähovi) LO is currently more or less fixed. I doubt we could try
>>>>>> modify it before the session.
>>>>>>
>>>>>> All the best,
>>>>>> Juha
>>>>>>
>>>>>>
>>>>>>> Thomas Krichbaum <tkrichbaum at mpifr-bonn.mpg.de
>>>>>>> <mailto:tkrichbaum at mpifr-bonn.mpg.de>> kirjoitti 9.9.2020 kello 19.06:
>>>>>>>
>>>>>>> Hi Helge,
>>>>>>>
>>>>>>> in the standard GMVA setup, we usually use firstlo =85500.0 MHz.
>>>>>>>
>>>>>>> In the next session there is one experiments, which requires
>>>>>>> observations at 88 GHz, with a different firstlo =87300.0 MHz. This LO
>>>>>>> is one of the possible modes, which the VLBA can do.
>>>>>>>
>>>>>>> Can you please confirm that this is possible for all GMVA stations.
>>>>>>>
>>>>>>> I attach a skeleton for the new setup. I also note
>>>>>>> that in the next GMVA run, we will need to change form
>>>>>>> one setup to the other one:
>>>>>>>
>>>>>>> FRNGTST  86 GHz standard
>>>>>>> POLCAL1  86 GHz standard
>>>>>>>
>>>>>>> MK018    88 GHz nonstandard
>>>>>>>       Eu 282  2200(08/10)-0530(09/10)
>>>>>>>       US 283  0400(09/10)-1030(09/10)
>>>>>>>
>>>>>>> MK016A   86 GHz back to standard
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> best Thomas
>>>>>>>
>>>>>>> -- 
>>>>>>> Dr. Thomas P. Krichbaum
>>>>>>> Max-Planck-Institut fuer Radioastronomie
>>>>>>> Auf dem Huegel 69
>>>>>>> D-53121 Bonn / Germany
>>>>>>>
>>>>>>> Mail: tkrichbaum at mpifr-bonn.mpg.de <mailto:tkrichbaum at mpifr-bonn.mpg.de>
>>>>>>> Tel.: (Germany +49)-228-525-295
>>>>>>> Web : http://www.mpifr-bonn.mpg.de/research/vlbi
>>>>>>> <tst.sum><tst.vex><test88ghz.key>_______________________________________________
>>>>>>> GMVAtech mailing list
>>>>>>> GMVAtech at lists.mpifr-bonn.mpg.de <mailto:GMVAtech at lists.mpifr-bonn.mpg.de>
>>>>>>> https://lists.mpifr-bonn.mpg.de/mailman/listinfo/gmvatech
>>>>>>
>>>>>
>>>>> -- 
>>>>> Dr. Thomas P. Krichbaum
>>>>> Max-Planck-Institut fuer Radioastronomie
>>>>> Auf dem Huegel 69
>>>>> D-53121 Bonn / Germany
>>>>>
>>>>> Mail: tkrichbaum at mpifr-bonn.mpg.de
>>>>> Tel.: (Germany +49)-228-525-295
>>>>> Web : http://www.mpifr-bonn.mpg.de/research/vlbi
>>>>
>>>
>>> -- 
>>> Dr. Thomas P. Krichbaum
>>> Max-Planck-Institut fuer Radioastronomie
>>> Auf dem Huegel 69
>>> D-53121 Bonn / Germany
>>>
>>> Mail: tkrichbaum at mpifr-bonn.mpg.de
>>> Tel.: (Germany +49)-228-525-295
>>> Web : http://www.mpifr-bonn.mpg.de/research/vlbi
>>
> 

-- 
Dr. Thomas P. Krichbaum
Max-Planck-Institut fuer Radioastronomie
Auf dem Huegel 69
D-53121 Bonn / Germany

Mail: tkrichbaum at mpifr-bonn.mpg.de
Tel.: (Germany +49)-228-525-295
Web : http://www.mpifr-bonn.mpg.de/research/vlbi