Difference between revisions of "R1 S6 SignalSearchLog"

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|Layer || Wire || Channel || Date ||Comments
 
|Layer || Wire || Channel || Date ||Comments
 
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|      ||      || U1        ||      ||This channel presents higher noise level than the other ones, which makes difficult to get a signal with amplitude below 30mV. This behaviour extends to all the first channels of each connector in the board.  
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|      ||      || U1        ||      ||This channel presents higher noise level than the other ones, which makes difficult to get a signal with amplitude below 30mV. This behaviour extends to all the first channels of each connector in the board. however, if a high enough trigger level is set in the scope, it is always possible to get a signal in these channels. 
 
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Revision as of 20:15, 9 May 2013

Testing procedure

Things that may cause "noise" that are actually due to your testing setup:

  • STB boards not securely attached to chamber. Make sure center screws (ones attaching directly to the chamber, not the nylon stand-offs) are tightened to 14 in. lb's.
  • Scope's termination set to 1Mohm. Set the scope to 50ohm termination.
  • Lower bandwidth of 1 Ghz scope to 200 Mhz. This attenuates peak height, but also rejects high frequency noise and reduces the noise level from 55-65 mV to ~11-15 mV.

Super Layer 1

STB-1 G1202220

Layer Wire Channel Date Comments
U1 This channel presents higher noise level than the other ones, which makes difficult to get a signal with amplitude below 30mV. This behaviour extends to all the first channels of each connector in the board. however, if a high enough trigger level is set in the scope, it is always possible to get a signal in these channels.

STB-2

Layer Wire Date comments

STB-3

Layer Wire Date comments

STB-4

Layer Wire Date comments

STB-5

Layer Wire Date comments

STB-6

Layer Wire Date comments

STB-7

Layer Wire Date comments

Super Layer 2

STB-1

Layer Wire Date comments

STB-2

Layer Wire Date comments

STB-3

Layer Wire Date comments

STB-4

Layer Wire Date comments

STB-5

Layer Wire Date comments

STB-6

Layer Wire Date comments

STB-7

Layer Wire Date comments



CLAS12_R1_S6_QA