[mmaimcal]ATF Evaluation Receiver performance

[Al Wootten]

Folks,

I had a chat with Antonio today on the performance of the evaluation 
receivers for the ATF.  They should be very good indeed.  There is a 
table at:
http://almaedm.tuc.nrao.edu/forums/alma/dispatch.cgi/atfapproveddocs/showFile/100331/d20031010051106/No/Main%20specifications%20for%20the%20evaluation%20frontends.pdf
and graphs of performance across the band at:
http://almaedm.tuc.nrao.edu/forums/alma/dispatch.cgi/atfapproveddocs/folderFrame/100244/0/def/3337
but to summarize:
These are good receivers!
'Band 3' 85-105 GHz dual polzn, SSB 8GHz IF USB but some degradation on 
the outer 20%; HEMT amplifiers so 1/f stability an issue for total power 
continuum. Trx 80K.

'Band 6' 215-270 GHz single polzn DSB 2 GHz IF; SIS mixer.  Trx 70K or 
so, varies with position in the band.

Gain stability is also of interest and has been published:
http://almaedm.tuc.nrao.edu/forums/alma/dispatch.cgi/atfapproveddocs/folderFrame/100248/0/def/3337

Clear skies,
Al