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Is the WARP platform capable of accepting an external clock source? If
so what are the frequency, voltage, power ranges it can accept?
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I have got the answer at http://warp.rice.edu/trac/wiki/Hardware … Board_v1.1
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But I still did not find where the voltage and power ranges parameters are described for the acceptable external clocks.
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The off-board inputs on the Clock Board are tied to pins on the AD9510 clock buffers (via 1:1 transformers, for single-ended to differential conversion). You can find the min/max acceptable voltages in the AD9510 datasheet. For frequencies, the RF reference clock must be 20 or 40MHz. The sampling clock can theoretically be in [1,65]MHz (the acceptable speeds for the AD9248-65 ADC). In practice, the speed depends on both the ADC requirements and your FPGA design (i.e. meeting min/max requirements for your clocking circuits, etc.).
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