[evlatests] Prototype correlator Installation Plan

[Brent Carlson]

Jim,

We just realized today that the -48 VDC power supply in the correlator 
prototype will require 208 or 220 VAC supply, so minimum 2 phases of 110 
VAC is required.  This is because these power supplies cannot be bought 
to operate on 110 VAC.  Hopefully this is not a problem...I will update 
the correlator prototype test plan to reflect this change of requirement.

Brent

Jim Jackson wrote:

> Hopefully, this suffices for an initial prototype correlator 
> installation plan. We'll fill in the details as we get closer to 
> actually having a prototype correlator.
>
> Cheers,
> Jim
>
>
> The current plans for the installation of the prototype correlator are 
> as follows:
>
> 1.  It will be installed in the new shielded correlator room.  Power, 
> cooling, networking and other infrastructure are expected to be 
> available in this room well in advance of the prototype correlator 
> arrival sometime next year.
>
> 2.  It will use an integral AC line derived -48VDC power supply.  It 
> will not rely on the -48VDC power/battery plant being purchased for 
> the WIDAR correlator.
>
> 3.  Fiber optic splitters will be used on the data transmission fibers 
> to simultaneously drive separate deformatters located in the prototype 
> correlator and the VLA correlator room.  This will allow the EVLA 
> antennas to remain in use with the existing VLA system regardless of 
> the operational status of the prototype correlator.  There is more 
> than sufficient overhead available from the EDFA's to make up for the 
> loss of this splitter. We will have to decide on the location of the 
> splitters and EDFA chassis (if required).  There will be extra 
> deformatters available for this use.
>
> 4.  Timing and clock signals will be provided by the coax and fiber 
> being permanently installed for this purpose.
>
> 5.  This does not cover back-end computers for the prototype 
> correlator though I would assume we want those located in the new 
> correlator room as well.  Any thoughts on this?
>
>

-- 
Brent R. Carlson
Brent.Carlson at nrc-cnrc.gc.ca
Tel/Tél: (250) 493-2277 (ext. 346) |  Fax: (250) 493-7767
Design Engineer                    |  Ingenieur Concepteur
National Research Council Canada   |  Conseil national de recherches Canada
Dominion Radio Astrophysical Obs.  |  Observatoire federal de radioastrophysique
P.O. Box 248, 717 White Lake Rd    |  C.P. 248, 717 Rue White Lake
Penticton, BC, Canada V2A 6K3      |  Penticton, (C.-B.), Canada V2A 6K3
Government of Canada               |  Gouvernement du Canada