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r3 - 2020-10-09 - 13:27 - HirokiYamauchi
r2 - 2020-10-09 - 09:27 - HirokiYamauchi
r1 - 2020-05-11 - 12:51 - HirokiYamauchi

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Change Date Name Comment
  Hiroki New SCT DQ expert's page ("TEST") is created.

Inefficient module investigation flow

-- HirokiYamauchi - 2020-05-11

1. Find inefficient modules

Open the PAT display from

On this page, 20 modules are printed out sorted by efficiency for the most recent 10 runs by default.


  • effside0, effside1 = efficiency for side0 and side1 of the module
  • efficiency = module efficiency. It is computed as the average of effside0 and effside1. If a side is disabled, another side's efficiency is the module efficiency.
From now, you will investigate the reasons for inefficiency for recorded modules.

If you find the inefficiency modules with <90% for the most recent run, please check the following items for these modules.

2. Check HV

3. Check online defects

NPt Gain Defects

Go to PAT Display (, and open the efficiency table.

For the recorded inefficiency modules, please check the number of bad and dead strips.


If you find >70 affected strips for each defect, please record

  • Number of strips with either or both defect
You don't need to check modules further.

4. Check noisy strips

Stay on the efficiency table of PAT Display, please check the number of noisy strips.


If you find >70 noisy strips, please record

  • Number of noisy strips
You don't need to check these modules further.

5. Check quiet strips

Stay on the efficiency table of PAT Display, please click the link "hitmap".

Here you can look for instantaneously quiet chips and permanently quiet strips by configuration.


Instantaneously quiet chips

One example below.

If you find this pattern, please record

  • Chip number
    • Chip0: side0 and "Strip= 0~127"
    • Chip1: side0 and "Strip=128~255"
    • Chip2: side0 and "Strip=256~383"
    • Chip3: side0 and "Strip=384~511"
    • Chip4: side0 and "Strip=512~639"
    • Chip5: side0 and "Strip=640~767"
    • Chip6: side1 and "Strip= 0~127"
    • Chip7: side1 and "Strip=128~255"
    • Chip8: side1 and "Strip=256~383"
    • Chip9: side1 and "Strip=384~511"
    • Chip10: side1 and "Strip=512~639"
    • Chip11: side1 and "Strip=640~767"
  • Affected LBs (the rough number is okay; like "LB = 350-450" in the case of the below example)
Permanently quiet strips

One example below.

If you find this pattern, please record

  • Chip and strip numbers (for strip numbers, the rough number is okay; like "strip 512-540, chip 10" in the case of the below example)


6. Summarise your observations

Please summarise your observations here.

For the format, you can follow the previous shifters.

[IMPORTANT] If you find an inefficient module with unknown reasons, please check the history and see whether or not the module is already identified as a bad module. If the same module is on the "unknown" column in the past one month within a cell colored red, you don't need to take any further action. Otherwise, you may be the first person who finds a bad module to be investigated, so please inform it of SCT Run Coordinator (Kazuya) and SCT DQ Coordinator (Shigeki). If all of the inefficient modules are understood, no need to report the result to someone or at meetings

Topic attachments
I Attachment History Action Size Date Who Comment
PNGpng Instantaneously_quiet_chips.png r1 manage 359.1 K 2020-10-09 - 12:44 HirokiYamauchi  
PNGpng PAT_Display.png r1 manage 306.4 K 2020-10-09 - 11:02 HirokiYamauchi  
PNGpng PAT_Display_old.png r2 r1 manage 254.0 K 2020-10-09 - 11:57 HirokiYamauchi  
PNGpng Permanently_quiet_strips.png r1 manage 498.6 K 2020-10-09 - 13:12 HirokiYamauchi  
PNGpng effTable_noisyStrips_old.png r1 manage 100.6 K 2020-10-09 - 12:20 HirokiYamauchi  
PNGpng effTable_old.png r4 r3 r2 r1 manage 111.9 K 2020-10-09 - 12:09 HirokiYamauchi  
PNGpng effTable_old_2.png r1 manage 104.4 K 2020-10-09 - 12:36 HirokiYamauchi  
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Topic revision: r3 - 2020-10-09 - HirokiYamauchi
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