Chuck, you are using a stethoscope to diagnose a jet engine. Your Fluke 123 is rated as a 20 MHz scope. This would place the third harmonic of 7 MHz outside of the scope's bandpass (square waves are harmonic rich). You would need a scope with at least 70 MHz bandpass before you will get a reasonable looking 7 MHz square wave.
Fred Charles Eisnor wrote: > Fred Townsend wrote: > > My advise is to stay away from the crystal and measure the signal down stream of the > > > oscillator. I suspect you have not correctly located the source of your problem. > > Hi Fred, > > thanks for the thoughts. > > I'm using a Fluke 123 Scopemeter to measure the output from the buffer that would be >pin > 6. So I'm staying away from the actual crystal part of the circuit. > As I understand it from the manufacturer's schematics the output at the buffer, pin 6 > should be a square wave suitable to clock the rest of the circuit. > > regards, > > chuck > > -- > Author: Charles Eisnor > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB CHIPDIR-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). -- Author: Fred Townsend INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB CHIPDIR-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
