monitor lbw stability 11oct10

• this is similar to a2335 except for brd1,2 are both pols.
  
• lbw in linear pol mode
• the 1280 hi pass and 1230 to 1470 bandpass rf filters were used.
• The tiedowns were left tracking during this observation.
  
• 3  1800 sec drifts were taken with the az,dome  at 231.2, 8.4676.
  
• the cor setup was:
• 1024 lags x 2 pols, 9 level, 1 second dumps
• brd 1: 12.5Mhz 1374 Mhz
• brd2: 12.5 Mhz 1374 Mhz
• brd 3: 25 Mhz 1365 Mhz
• brd 4: 25 Mhz 1385 Mhz

• each band was normalized to the median value
• black: band1, red band2, green band 3, blue band 4.
• Vertical scale +/- 1%.
  
• Top: total power vs time polA
• Middle: total power vs time polB.
• Bottom: total power ratio vs time: polA/PolB  

Discussion:

• There are no rapid jumps in power.
• the polA/polB ratio changes slowly up to about 2%.