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This page summarizes the heatsink testing results.
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This page summarizes the heatsink testing results.
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## Fine Delay on SVEC
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## Fine Delay on SVEC (lab test)
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*Test evironment:**
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*Test evironment:**
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... | @@ -30,6 +30,34 @@ FMC slot 2 and FMC TDC in FMC slot 1 |
... | @@ -30,6 +30,34 @@ FMC slot 2 and FMC TDC in FMC slot 1 |
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considered measurement error)
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considered measurement error)
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\- small heatsinks glued on the chips give improvement of 8 degrees C
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\- small heatsinks glued on the chips give improvement of 8 degrees C
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## ELMA operational crate full of Fine Delays
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*Environment**
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\- crate: 18-slot ELMA VME64x
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\- contents: 6 SVECs with 12 Fine Delays in total
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*Results:**
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| **VME Slot** | **FMC Slot** | **Temperature (degrees Celsius)** |
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| 7 | FMC1 (lower) | 42.7 |
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| 7 | FMC2 (upper) | 56.1 |
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| 8 | FMC1 (lower) | 61.8 |
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| 8 | FMC2 (upper) | 70.0 |
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| 9 | FMC1 (lower) | 64.7 |
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| 9 | FMC2 (upper) | 73.6 |
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| 10 | FMC1 (lower) | 60.8 |
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| 10 | FMC2 (upper) | 71.0 |
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| 11 | FMC1 (lower) | 52.4 |
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| 11 | FMC2 (upper) | 59.2 |
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| 12 | FMC1 (lower) | 40.2 |
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| 12 | FMC2 (upper) | 51.6 |
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*Conclusions**
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\- Cards in the middle slots (8-10) are the worst (25 degC difference
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over slots 7 and 12). Uneven air flow in the crate?
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\- FMC1 is approximately 8-10 degrees cooler than FMC2.
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### Files
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### Files
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