Hi, Thanks for the response, I did expect this. It saves me the experiment.
henk On Jan 3, 2009, at 23:33, Bruce Griffiths wrote: > Poul-Henning Kamp wrote: >> In message <494882EB-D714-49B4-A7E2- >> [email protected]>, Henk ten Pi >> erick writes: >> >>> Hi, >>> >>> An opto coupler seems good idea for an isolation amplifier but >>> maybe >>> not for the phase noise. >>> >> >> Optocouplers have lousy dV/dt performance, so the jitter is >> horrible. >> >> > Not true for the higher speed optoisolators (eg Avago's HCPL9000 > series) > In any case its more a matter of noise to slew rate ratio. > > The issue is really that the signal to noise ratio of the internal > optical signal is relatively low. > For better performance you need to use a higher power optical signal > such as that from a single mode laser. > However by the time you factor in the cost of the modulator etc its > usually better to revert to a conventional design. > > Bruce > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/ > time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
