[evlatests] Another 3-bit test

[Rick Perley]

    Ken repeated the test wherein he changes the input power level in 3 
dB steps -- 5 levels overall. 

    I checked the rms noise in the blank field. 

    There is a small change in rms noise between the low-power and 
high-power inputs.  For the low power, we have

    12        15          22           28
12 XX     .28         .54          .40
15  .23       XX      .54          .37
22  .27        .32       XX        .77
28  .31      .33        .43          XX

    while for the high power input

    12        15          22          28
12 XX     .22        .44           .30
15  .17      XX     .36           .25
22  .23     .23        XX         .48
28  .25     .24        .30           XX

    But, as usual, all correlations are noisier than they should be, 
some (especially with antenna 22 in RCP) very much so.

   

Ken Sowinski wrote:
> On Wed, 8 Sep 2010, Michael Rupen wrote:
>
>>  another 3-bit data set.  This is a repeat of the "step through input
>> power level" file, 1 subband, 4 antennas padded with 3 extras so we
>> should have ALL the autocorrelations (huzzah!).
>>
>>  File name: C3step_011
>>  started 2224
>>  ended 2300
>
> Changes since last time we tried this.
>
> Better weather.
> A better tuning: away from interference and a multiple of 128 MHz.
> Larger offset for the "off" pointing.  .02 radians instead of .01
>
> Ken