[evlatests] WIDAR P-band status update: 20APR2015

[Huib Intema (NRAO)]

Dear P-banders,

Here is the outcome of a short VLA WIDAR P-band status test (few minutes
on 3C48) we ran on April 20. EA17 was out. Unfortunately, several
antennas have no switched power. And as usual, quite a few have bandpass
ripples.

Major points of attention are:

+ EA13 no longer has low power nor erratic bandpass shape in YRH (thanks
for the fix!)

~ EA05 no longer has fast bandpass ripple (fixed or transient?)
~ EA19 no longer has fast bandpass ripple on XLV and YRH (fixed or
transient?)

- EA02 has 10 percent bandpass ripple on XLV and YRH (both 6.2 MHz = 24 m)
- EA03 has 20 percent bandpass ripple on XLV and YRH (both 3.1 MHz = 48 m)
- EA03 has no switched power
- EA04 has 20 percent bandpass ripple on XLV (20 MHz = 7.5 m)
- EA05 has no switched power
- EA06 has no switched power
- EA08 has 10 percent bandpass ripple on YRH (3.6 MHz = 42 m)
- EA11 has no switched power
- EA13 has 20 percent bandpass ripple on XLV (20 MHz = 7.5 m)
- EA14 has 40 percent bandpass ripple on XLV (20 MHz = 7.5 m)
- EA14 has 20 percent bandpass ripple on YRH (20 MHz = 7.5 m)
- EA15 has 13 percent power in the cross-polarizations
- EA19 has no switched power
- EA20 has 30 percent bandpass ripple on XLV (20 MHz = 7.5 m)
- EA20 has 13 percent power in the cross-polarizations
- EA20 switched power varies over time (factor of two)
- EA21 has 30 percent bandpass ripple on XLV (140 MHz = 1.1 m)
- EA21 has 50 percent power on XLV
- EA26 has deformatter problem on XLV (already reported to Vivek)
- EA28 has 10 percent bandpass ripple on XLP (3.6 MHz = 42 m)

-- Huib