[evlatests] Testing faster setup times (attenuators and requantizers)

[Ken Sowinski]

On Tue, 26 Nov 2013, Bryan Butler wrote:

>
> to be clear,
>
> Rick Perley wrote, On 11/26/13 14:32 :
>>
>> 20 seconds be allocated
>> for the first observation following a change of correlator mode or
>> frequency tuning.
>
> to be clear, this is only if you are going to a different 3-bit tuning,
> to allow time for the requantizer gain level to be set.  so it's not
> after every change of correlator mode or frequency tuning.

yes.

>>      From this test, the 60 seconds initial setup is just sufficient.
>> The 20 second requantizer change is generous, but only because of the
>> chosen bands in my test.
>
> it would be good to do a test switching between, say, K-band and X-band,
> to have a longer subreflector slew.

That was the combination I used in my testing.  Twenty seconds is
adequate in that case as well.  It was chosen to allow the maximum
possible subreflector rotation of 180 degrees which, nominally,
takes about 12 seconds.