The Tektronix 1502 uses a tunnel diode pulser to produce a 50 picosecond output step of about 200 millivolts. There is a misprint in the theory section of the service manual which says "400 V" instead of "400mV".
On Thu, 30 Jun 2016 04:19:43 -0400, you wrote: >If the nominal velocity of propagation is known and length is known delay is >easily determined mathematically > >Time Domain Reflectrometry is the usual technique for finding cable length but >even there the cables NVP is an essential parameter if you want to compute >length but not essential in time nuts application because we are interested in >delay which a TDR reads directly When using a TDR its best if cable is >unterminated as the discontinuity at the end is helpful as a marker. Also >most TDRs like the Tek 1502 can put 100v or more on the cable which will blow >most GPS antennas _______________________________________________ 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.
