); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] Brooke Clarke wrote: > Hi Bruce: > > The common pin has a 100 ns period wave at + and - 500 mv. > One of the center pins on the INT/EX switch had + and - 1 volt at 100 ns > period. > Have Fun, > > Brooke Clarke > http://www.PRC68.com > http://www.precisionclock.com > Brooke
The 10MHz level translator for the MC12040 probably looks something like the posted schematic, basically a longtailed pnp pair that translates a sinwave (or TTL) input to differential ECL levels. The base of Q2 may be biased at 1,4V or so to translate TTL level from the on board oscillator or GND for a sinewave input. Supply voltages may vary but essentially the collectors should produce complementary ELC level signals one of which is used to drive the MC12040. Details may differ but essentially one collector will produce an ECL output to drive the MC12040. Check the voltage waveforms on the MC12040 pins 6 and 9. Bruce _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.