[evlatests] summary of January 3 stress test results

[Emmanuel Momjian]

General:

- Global VLA-EVLA phase jump after the P-band scan in all bands.

- The first (bad) record problem is seen in the data.

- The last scan of the run came out just fine and ended when it was 
supposed to (this last scan was recorded with a 10 second dump time).

- Short shallow drops in amplitude seen in various EVLA antennas and in 
C, X, and L bands, Also in K-band but in EVLA 11 only.

- Reference pointing: The following are about flux densities measured 
using the reference pointing solutions of some antennas that looked 
problematic, (antennas 1, 3, 14) or thought to have problems (ante 13):
1) EVLA 1: The measured flux densities in both polarizations are 50% of 
other antennas. However, its correlator coefficient values are 
comparable to those of others and in all frequency bands.
2) VLA 3: The measured flux densities in both polarizations are 30% of 
other antennas. However, its correlator coefficient values are 
comparable to those of others and in all frequency bands.
3) EVLA 13: reference pointing solutions look ok.
4) EVLA 14: The measured flux density in pol R looks Ok, but pol L is 
very low (25%). Tsys values of pol L in both IFs is double of those in 
pol R.


Band specific:

X-band:
-EVLA 14: IFs C and D are less sensitive than IFs A and B. Their 
correlator coefficient values are worse by a factor of about 1.5.
-EVLA 17: All IFs are less sensitive by 10-20% compared to other 
antennas. Tsys values are 2-3 times higher than those seen in other 
antennas.

K-band:
-EVLA 19: ALL IFs are less sensitive by a factor of about 1.7 compared 
to other antennas. Tsys values are about 130 K, compared to about 40-50 
K in other antennas.
-EVLA 25: ALL IFs are less sensitive by a factor of about 2.6 compared 
to other antennas. Tsys values are about 250 K.

L-band:
-EVLA 21: IFs A and B are less sensitive than IFs C and D by a factor of 
about 1.5.

P-band:
-EVLA 13: Weak fringes in all IFs (10% or lower compared to other antennas)
-EVLA 19: Weak fringes in IF C (40% of other antennas)
-EVLA 26: Weak fringes in IF C (50% of other antennas), very weak or no 
fringes in IF D.