Neville Michie wrote: > > Is this calibrator gated? > > Back in the stone age when I started work, a CRO (with a 5BP1 tube in > it) was calibrated in time by a gated oscillator > that put little pips on the trace at 1 microsecond intervals. > So that the markers would not crawl across the screen the oscillator > was stopped > and started for each trace so as to be in phase with the synch pulse. > The CRO was probably 1950s vintage, I was using it in 1961 for > calibration of navigation radar. > The CRO tubes were very non-linear so graticule divisions were not > accurate enough. > cheers, > Neville Michie > > No, its just a crystal oscillator plus a collection of frequency multipliers dividers and pulse shapers with no gating (other than frequency/period selection switches) in evidence.
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.
