[evlatests] P band (and 4 band) summary - Antenna 13

[Jim Jackson]

Even though Antenna 13 has an M301, its older T302 does not switch 
between 4P and LSC. Therefore, when you have 13 setup for 4 or P 
band, you will see L-band signal coming from the antenna since the 
L301 setting is the same.  This will be corrected whenever we add 4P 
to the antenna. For now, when doing a 4 or P observation you should 
exclude 13 from the array.

Jim

At 05:17 PM 6/6/2007, you wrote:
>While testing the executor changes made today I was able to survey
>the behavior of all the antennas at P band.  Most of the antennas
>have P band systems and usable T301s.  I present here only the
>problems.  The summary is based only on total power, SD measurements
>and spectra taken from the eight bit sampler as it was too windy to
>point the antennas.
>
>P band
>Antenna 13 looks like it has a working system, but does not.  There
>is a reasonable amount of power and non zero synch detector voltages.
>
>Antenna 16 does not work because it lacks an M301 to control the T301.
>
>Antenna 17 needs to have the BD attenuators adjusted.
>
>Antenna 19 is not there at all.  No total power.
>
>Antenna 21 needs to have the BD attenuators adjusted.
>
>Antenna 23 has no 4 meter receiver connected.
>
>Antenna 24 has strange looking spectra.  The BD attenuators need
>to be set, but I question doing that until we know everything is
>in order.  There is some confusion because the L304 shows that
>the antenna is at X band even though P band commands have been
>sent to it.
>
>Antenna 26 is not there.  Plenty of noise, but no synch detector.
>
>
>4 band
>Antenna 14 does not seem too happy in IFs C and D.
>
>Antenna 23 has no 4 meter receiver connected.
>
>
>Chuck was able to obtain spectra from the samplers for all the
>working P band antennas.  There seems to be lots of variation in
>relative power levels between 75 MHz and 300 MHz among the antennas
>and this makes it hard to choose a single FIR gain parameter which
>works for all antennas.  I will examine all the plots and provide
>a summary of the power levels measured.
>
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