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Altera_Forum
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10 years ago

Stratix V GS DSP Development Kit - XCVR Reference Clock SMA's

I am developing a project using the Stratix V GS DSP development kit. I need to deliver a clock to the high speed transceivers on the HSMC ports, however due to the design of the dev kit, all but one...
Altera_Forum's avatar
Altera_Forum
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10 years ago

Bob,

The capacitor and (124 || 84.5) termination make sense from an impedance point of view - and match what is in that document, so that now makes sense as a differential termination.

However there are additional 100Ohm terminations to ground which if figure 3 from that document is anything to go by should be at the source, not a termination. The termination resistance as a result ends up being 33Ohm which is not correct.

Tom.