[evlatests] compression tables for Ku band

[Rick Perley]

    Taurus A is about 5 x 7 arcminutes in size, so at Ku band it is 
being significantly resolved by our primary beam (about 3 arcminutes at 
15 GHz).  The 15 GHz total flux of Taurus is about 460 Jy, but due to 
the resolution, the increment in system temperature is about 25K, 
approximately doubling the system temperature. 
I tuned to 13.2 and 16.8 GHz for AC and BD, respectively. 

    The PDif values show both compression and expansion, generally by 
small amounts.  Note that the accuracy of these measurements is 
generally better than 1%, so a compression ratio of 99 or 101 (percent) 
is significantly different from 100. 

Antenna           A               B                 C               D
--------------------------------------------------------------------------
    1                  96            100              95               98
    2                 102             97             102              95
    3                                 no receiver
    4                 100            95              100              98
    5                   95           101               95             100
    6                   99           100             100             100
    7                 105           100             107             100
    8                               no receiver
    9                               no receiver
    10                                  in barn
    11               100             94              98                95
    12                 96            100             97               100
    13                 97              99             97                 96
    14                 98              98            102                94
    15                             no receiver
    16                 95             100            95                 99
    17                 98             100            96                 99
    18                 95              99             94                 97
    19                 98              99             98                 94
    20                 96              99            101              
bad data
    21                 99             100             100              99
    22                 98             100            96                100
    23                 96             100            94                  98
    24                100            100            97                  99
    25                  98            100            95                 100
    26                 100              98           99                   98
    27                                 no receiver
    28                                 no receiver
-------------------------------------------------------------------------

    There is generally less compression in the BD IFs, almost certainly 
because of less power -- the primary beam at 16.8 GHz more heavily 
resolves out the source.