[evlatests] WIDAR bronze dataset - C band dual pol.

[Michael Rupen]

Hi Sanjay --


> By "attenuators fixed" do we mean that the automatic gain controllers
> are off?  I.e., does the magnitude of the signal to the samplers vary
> a lot?

Yes, AGCs are off.  The signal to the samplers will vary somewhat but not 
enormously, especially with 8-bit samplers.  We turn off the attenuators for 
two reasons: (1) since we don't scale by the total power (autocorr'n lag 
zero), changing the attenuation leads to jumps in the recorded amplitude, 
which makes it difficult to calibrate; (2) changes in the attenuation 
sometimes lead to changes in the bandpass, which introduces another complexity 
into the calibration and interpretation.

               Michael