Got a new freqency counter, the Fluke PM6690. First, it is also about Spectracom/Pendulum CNT-90 and also about Tektronix FCA3000. These counters are actually relabeled Pendulum CNT-90.Continue reading “New Fluke PM6690 counter”
There are some units on eBay, but the sellers mostly don’t know and describe them as having the “Opt 001” inside, a.k.a. 33120-80001, a.k.a. 33120-66503.
The Option 001 phase lock/TCXO timebase gives you the ability to generate synchronized phase-offset signals. An external clock input/output lets you synchronize with up to three other 33120As or with an external 10-MHz clock.Continue reading “HP Agilent 33120A AWG Opt 001”
This precious thing allows me to connect my GPSDO and have very stable 10MHz output, so all test equipment can use it as reference. The GPSDO itself provides very stable frequency, but has “only” an OCXO inside. So, long-time stability comes from GPS, but now short-time stablility also comes from the rubidium standard and not from the OCXO anymore. So more long- and short-time stability!Continue reading “Symmetricom Rubidium Standard”
This is how the old good Tektronix TDS380 acquires a 500MHz signal from Marconi Instruments 2031 signal generator. Very stable, calm trigger and display. No jumping around, albeit using 16x averaging.Continue reading “View 500MHz on Tektronix TDS380”
This is frequency modulated signal on a oscilloscope, but the carrier frequency is lower than the modulation frequency.Continue reading “Playing with the oscilloscope”