[evlatests] P-band switched power observed at S-band

[Vivek Dhawan]

Based on Paul's list, I looked at Pdif vs. antenna at P band.
Turns out ea01 has zero Pdif at P band, which explains why it
is so good at not leaking into S band. But ea10, 11, 18, at
the bottom of Paul's list, are really good, they have normal
P-band cals and do not leak. We should figure out what is
different between one of these and ea03, the worst.

Looking at the block diagram (maybe not correct) a 500MHz low-
pass filter on the output of the P-band noise diode, before it
is injected into the P band receiver, might fix it.

>>>> > >  Cheers,
>>>> >  Paul
>>>> > >  ----
>>>> > >  P/S Pdif ratios
>>>> > >  Ant    IF-A   IF-B   IF-C   IF-D
>>>> >  ea03*  0.758  0.763  1.355  1.350
>>>> >  ea07   0.503  0.492  0.512  0.506
>>>> >  ea09*  0.416  0.422  0.292  0.286
>>>> >  ea15   0.400  0.400  0.282  0.295
>>>> >  ea25   0.247  0.299  0.015 -0.014
>>>> >  ea21   0.244  0.248  0.457  0.498
>>>> >  ea26   0.151  0.158  0.125  0.116
>>>> >  ea12*  0.136  0.133  0.494  0.474
>>>> >  ea05*  0.119  0.122  0.077  0.074
>>>> >  ea14*  0.112  0.116  0.147  0.146
>>>> >  ea28   0.097  0.102  0.065  0.065
>>>> >  ea23*  0.086  0.087  0.167  0.179
>>>> >  ea04   0.074  0.077  0.061  0.057
>>>> >  ea16   0.072  0.072  0.073  0.070
>>>> >  ea13*  0.065  0.057  0.029  0.030
>>>> >  ea24   0.061  0.060  0.060  0.060
>>>> >  ea27*  0.054  0.054  0.057  0.059
>>>> >  ea17   0.050  0.048  0.069  0.050
>>>> >  ea06*  0.044  0.044  0.049  0.049
>>>> >  ea22   0.039  0.036  0.054  0.063
>>>> >  ea20   0.038  0.037  0.048  0.051
>>>> >  ea19*  0.023  0.024  0.008  0.008
>>>> >  ea18*  0.002  0.001  0.006  0.006
>>>> >  ea01* -0.000 -0.000 -0.000 -0.000
>>>> >  ea10* -0.001 -0.000  0.004  0.004
>>>> >  ea11* -0.008 -0.007 -0.021 -0.021
>>>> > >
>>>>> _______________________________________________
>>>> >  evlatests mailing list
>>>> >  evlatests at listmgr.nrao.edu
>>>> >  https://listmgr.nrao.edu/mailman/listinfo/evlatests
>>>> >  _______________________________________________
>>>>  evlatests mailing list
>>>>  evlatests at listmgr.nrao.edu
>>>>  https://listmgr.nrao.edu/mailman/listinfo/evlatests
>>>
>>> _______________________________________________
>>> evlatests mailing list
>>> evlatests at listmgr.nrao.edu
>>> https://listmgr.nrao.edu/mailman/listinfo/evlatests
>>>
>>>
>>
>> _______________________________________________
>> evlatests mailing list
>> evlatests at listmgr.nrao.edu
>> https://listmgr.nrao.edu/mailman/listinfo/evlatests
>
> _______________________________________________
> evlatests mailing list
> evlatests at listmgr.nrao.edu
> https://listmgr.nrao.edu/mailman/listinfo/evlatests
>