Hi Gene,
You don't want to use an opto-isolation card with the G540 as it already is opto-isolated. Cheers, peter --------------------------- Peter Homann http://www.homanndesigns.com/store On Mon 16/04/12 2:04 PM , gene heskett wrote:On Sunday, April 15, 2012 11:55:24 PM Kirk Wallace did opine: > On Sun, 2012-04-15 at 21:37 -0400, gene heskett wrote: > ... snip > > > What happens if the pump frequency is reduced to say 10% of what its > > set at now? > > I haven't tried that. If I disconnect the G540 so there is no load on > the parallel port pin, the charge pump is a clean square wave. I used > 10x on the probe, if that makes a difference (I know just enough > scopenese to get by). > > > Looking at the scope traces, either the probe is way out of > > calibration against the scopes own test square wave, or the 540 has a > > low value series resistor, 33-120 ohm range, with several hundred pf > > on the other side of the resistor as a noise filter on that input, > > and likely on all inputs since engineers have a tendency to 'step Doctors and lawyers must go to school for years and years, often with little sleep and with great sacrifice to their first wives. -- Roy G. Blount, Jr. ------------------------------------------------------------------------------ For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 [1]" target="_blank">http://p.sf.net/sfu/Boundary-d2dvs2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users [2] ------------------------- Message sent via Atmail Open - http://atmail.org/ Links: ------ [1] http://p.sf.net/sfu/Boundary-d2dvs2 [2] http://webmail.homanndesigns.com/parse.php?redirect=https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ For Developers, A Lot Can Happen In A Second. Boundary is the first to Know...and Tell You. Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! http://p.sf.net/sfu/Boundary-d2dvs2 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
