[evlatests] L352 modules

[Vivek Dhawan]

Here is a quick update after the change reported by Rob below.

--------------------------

Based on today's data, Feb 23, 0-18 UT: (on ant 13 with long fiber)

Unit #3d: OK - seems to be the best of the lot, this week.
      But it had jumps last week - feb 15th, when tested at the AOC.
      3D and 51 tracked each other at the AOC test setup, much better
      than they track each other in the field.

#40: has opposite sign from 3d.

    3d and 40 track each other. 40 has a couple 1ps steps, not good.
    Otherwise (3d-40) differences are within spec.

#51: is really BAD now. Also has same sign as 3d, whereas
     yesterday it was inverted. Its response consists of
     almost constant periods interspersed by big steps.

#52: same sign as 3d, as before. Now has the lowest coeff. of
     response, ( 52 = 3d * 0.7) whereas yesterday it had the highest
     ( 52 = 3d * 1.15)

--------------------------

Just yesterday, on Ant 14, feb 17-22, BEFORE Rob's changeover:

3d and 40 agree (with opposite sign, as above).

51: same sign as 3d, but coeff is lower (0.85 * 3d)

52: opposite sign from 3d. coeff was higher, (1.15 * 3d)

-------------------------

Vivek.


Rob Long wrote:

> The L352 modules were hooked up to the long length of fiber we have 
> looped around on ant 13 today.  I had to install an amplifier in the 512 
> MHz line coming from the L353 to get power levels acceptable, but all 
> modules are now receiving identical levels from the same source (using a 
> single fiber).
> 
> Rob
> 
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