Difference between revisions of "R1 S6 SignalSearchLog"
Jump to navigation
Jump to search
| Line 12: | Line 12: | ||
==STB-1 G1202220== | ==STB-1 G1202220== | ||
{| border="1" |cellpadding="20" cellspacing="0 | {| border="1" |cellpadding="20" cellspacing="0 | ||
| − | |- | + | |-e |
|Layer || Wire || Channel || Date ||Comments | |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. | | || || 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. | ||
|- | |- | ||
| − | | || || U24 || || Warm Wire | + | | || || U24 || || Warm Wire: This is a channel that always triggers a fake signal. |
| + | |- | ||
| + | | || || U38 || || Warm Wire | ||
| + | |- | ||
| + | | || || U66 || || HOT Wire: This is a channel that always triggers a fake signal very often. | ||
| + | |- | ||
| + | | || || U87 || || HOT Wire: This is a channel that always triggers a fake signal very often. | ||
| + | | || || U93 || || HOT Wire: This is a channel that always triggers a fake signal very often. | ||
|} | |} | ||
| + | The rest of channels not mention here has a similar behaviour between them, with a noise level not greater than ~20mV. | ||
==STB-2== | ==STB-2== | ||
Revision as of 20:28, 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. | ||||||||
| U24 | Warm Wire: This is a channel that always triggers a fake signal. | ||||||||
| U38 | Warm Wire | ||||||||
| U66 | HOT Wire: This is a channel that always triggers a fake signal very often. | ||||||||
| U87 | HOT Wire: This is a channel that always triggers a fake signal very often. | U93 | HOT Wire: This is a channel that always triggers a fake signal very often. |
The rest of channels not mention here has a similar behaviour between them, with a noise level not greater than ~20mV.
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 |