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Added Rework Instructions for Beta 2

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Aleksa Bjelogrlic 2024-07-21 16:15:22 -04:00 committed by GitHub
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@ -44,6 +44,18 @@ These are instructions for the XDMA gateware, which is currently the most stable
If you are getting under ~1000MB/s throughput on Linux, try turning off VT-d (Intel) or IOMMU/AMD-Vi (AMD) in BIOS or using "intel_iommu=off" in GRUB (Intel)
## Beta 2 Front End Rework
Remove the covers on the front end shielding cans, repeat the steps below for each channel.
![Screenshot of 3D View of Beta 2 Front End, C30 Labeled With "1", C26 Labeled With "2"](https://github.com/EEVengers/ThunderScope/blob/master/Docs/Beta%202%20Front%20End%20Rework.PNG)
1. Replace "1" with a 220pF 50V COG 0402 Capacitor (GCM1555C1H221FA16D), this will flatten the crossover response and eliminate peaking for square waves under ~100kHz.
- [Check out this video for an explaination](https://youtu.be/EY9enxyHi5o)
2. Replace "2" with a 1.2nF 100V C0G 0603 Capacitor (GCM1885C2A122FA16D), this will increase the frequency for which the maximum 100Vpp input voltage rating applies.
- [Check out this video for an explaination](https://youtu.be/33C-LlOQOUs)
## Baseboard Hardware
| Revision | Label | Status | Location |