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Riken edited this page Feb 1, 2016
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####February 1, 2016
- (RIKEN) we have tested operating the DDS with 16 full channels. We found out that there was a problem with power distribution. The current drawn by the board was large enough to create substantial voltage drop in the power line that runs underneath the PCI sockets. A hot-fix that Yamaguchi-san (RIKEN's researcher) did was to route the power line directly underneath each PCI connector.
Next breakout board should have wider trace for power delivery.
- Also it might be better to ground the digital and analog power supply right on the breakout board.
####October 15, 2015
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BNC connection for AUX CLK IN is actually connected to the SYS_CLK_4 output of the PLL of the XEM6010 module. Need to correctly route this to the CLK_IN of the FPGA board in the later version.
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Fixed in the latest breakout board.