Difference between revisions of "R1 S6 SignalSearchLog"
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* 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. | * 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. | ||
+ | |||
+ | * Extra movement a vibrations in the amplifier. | ||
=Super Layer 1= | =Super Layer 1= | ||
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[[File:U15_SV_1289_Big_Positive_Spark.png|200px]][[File:U21_SV_1310_Big_Positive_Spark.png|200px]][[File:U28_SV_1310_Big_Positive_Spark.png|200px]] | [[File:U15_SV_1289_Big_Positive_Spark.png|200px]][[File:U21_SV_1310_Big_Positive_Spark.png|200px]][[File:U28_SV_1310_Big_Positive_Spark.png|200px]] | ||
|- | |- | ||
− | | || || U61 || ||Hot and Noisy. | + | | || || U61 || ||Hot and Noisy. The Cause of the noise is the amplifier used. It turns out that this device is very sensitive to the vibration and movement. |
[[File:U61_SV_1350_HOT_Noise.png|200px]] | [[File:U61_SV_1350_HOT_Noise.png|200px]] | ||
|} | |} | ||
− | ==STB-5== | + | ==STB-5 G1202271== |
{| border="1" |cellpadding="20" cellspacing="0 | {| border="1" |cellpadding="20" cellspacing="0 | ||
|- | |- | ||
− | |Layer || Wire || Date ||comments | + | |Layer || Wire || Channel || Date ||comments |
+ | |- | ||
+ | | || || U08 || ||Hot and Noisy. | ||
+ | [[File:U08_SV_1289_HOT_Noisy.png|200px]] | ||
+ | |- | ||
+ | | || || U17 || ||Noise. | ||
+ | [[File:U17_SV_1289_Noise.png|200px]] | ||
+ | |- | ||
+ | | || || U18 || ||Noise. | ||
+ | [[File:U18_SV_1289_Noise.png|200px]] | ||
+ | |- | ||
+ | | || || U33 || ||Noise. | ||
+ | [[File:U33_SV_1289_Noise.png|200px]] | ||
+ | |- | ||
+ | | || || U34 || ||Noise. | ||
+ | [[File:U34_SV_1289_Noise.png|200px]] | ||
+ | |- | ||
+ | | || || U49 || ||Noise. | ||
+ | [[File:U49_SV_1289_Noise.png|200px]] | ||
+ | |- | ||
+ | | || || U50 || ||Noise. | ||
+ | [[File:U50_SV_1289_Noise.png|200px]] | ||
+ | |- | ||
+ | | || || U60 || ||Hot. | ||
+ | [[File:U60_SV_1289_HOT.png|200px]] | ||
+ | |- | ||
+ | | || || U65 || ||Noise. | ||
+ | [[File:U65_SV_1289_Noise.png|200px]] | ||
+ | |- | ||
+ | | || || U66 || ||Noise. | ||
+ | [[File:U66_SV_1289_Noise.png|200px]] | ||
+ | |- | ||
+ | | || || U81 || ||Noise. | ||
+ | [[File:U81_SV_1289_Noise.png|200px]] | ||
+ | |- | ||
+ | | || || U82 || ||Noise. | ||
+ | [[File:U82_SV_1289_Noise.png|200px]] | ||
+ | |- | ||
+ | | || || U88 || ||Hot. | ||
+ | [[File:U88_SV_1289_HOT.png|200px]] | ||
|- | |- | ||
− | | | + | | || || U89 || ||Hot. |
+ | [[File:U89_SV_1289_HOT.png|200px]] | ||
|} | |} | ||
Line 99: | Line 141: | ||
|} | |} | ||
− | ==STB-7== | + | ==STB-7 G1202272== |
{| border="1" |cellpadding="20" cellspacing="0 | {| border="1" |cellpadding="20" cellspacing="0 | ||
|- | |- | ||
− | |Layer || Wire || Date ||comments | + | |Layer || Wire || Channel || Date ||comments |
+ | |- | ||
+ | | || || U23 || ||Hot wire [[File:U23_HOT.png|200px]] | ||
+ | |- | ||
+ | | || || U69 || ||Hot wire [[File:U69_HOT.png|200px]] | ||
|- | |- | ||
− | | | + | | || || U78 || ||Hot wire [[File:U78_HOT.png|200px]] |
+ | |- | ||
+ | | || || U92 || ||Hot wire [[File:U92_WARM.png|200px]] | ||
+ | |- | ||
|} | |} | ||
Latest revision as of 21:47, 15 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.
- Extra movement a vibrations in the amplifier.
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. | |||
U93 | HOT Wire. |
The rest of channels not mention here has a similar behaviour between them, with a noise level not greater than ~20mV.
STB-2 G1202266
Layer | Wire | Channel | Date | comments |
U38 | Hot wire. | |||
U40 | Warm wire. | |||
U51 | Hot wire. | |||
U65 | Hot wire. |
STB-3 G1202273
Layer | Wire | Channel | Date | comments |
U1 | Hot wire. | |||
U2 | Hot wire. | |||
U39 | Hot wire. | |||
U78 | Hot wire. |
STB-4 G1202275
Layer | Wire | Channel | Date | comments |
U15,U21,U28 | This Board presents a unusual noise in all the channels. The noise is a big positive spark, which makes difficult the recolection of signals. However, It was possible by setting a higher trigger level in the scope. | |||
U61 | Hot and Noisy. The Cause of the noise is the amplifier used. It turns out that this device is very sensitive to the vibration and movement. |
STB-5 G1202271
Layer | Wire | Channel | Date | comments |
U08 | Hot and Noisy. | |||
U17 | Noise. | |||
U18 | Noise. | |||
U33 | Noise. | |||
U34 | Noise. | |||
U49 | Noise. | |||
U50 | Noise. | |||
U60 | Hot. | |||
U65 | Noise. | |||
U66 | Noise. | |||
U81 | Noise. | |||
U82 | Noise. | |||
U88 | Hot. | |||
U89 | Hot. |
STB-6
Layer | Wire | Date | comments |
STB-7 G1202272
Layer | Wire | Channel | Date | comments |
U23 | Hot wire ![]() | |||
U69 | Hot wire ![]() | |||
U78 | Hot wire ![]() | |||
U92 | Hot wire ![]() |
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 |