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. however, if a high enough trigger level is set in the scope, it is always possible to get a signal in these channels. | + | | || || 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(~40mV), it is always possible to get a signal in these channels. |
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Revision as of 20:16, 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(~40mV), 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 |