[evlatests] Negative Switched Power!!!

Bruce Rowen browen at nrao.edu
Fri May 27 17:49:50 EDT 2011


On May 27, 2011, at 3:37 PM, Rick Perley wrote:

>
>    How sure are we that the 'on' and 'off' durations are precisely  
> equal?


The noise diode is modeled on the station boards. The board is  
provided an epoch, period, and phase for the noise diode switching.  
This establishes a model 20Hz signal
which is used by the sub band filters to collect power integrations  
and validity counts into noise diode on/off bins. Resolution of this  
model is down to 1/256MHz.

-Bruce

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