That completes the picture very nicely. The 30-minute run looks highly repeatable and stable. The important observations are: So your measured sequence is approximately: The particularly convincing result Your Pin-3…
From my experiments, the following have been confirmed for my unit, unless stated otherwise. Confirmed pinout arrangement for my particular 5650A device: For the FE-5650A pinout we have been using…
https://www.astronomy.me.uk/first-successful-rubidium-lock-achieved-with-5650a-rubidium-time-source-12-september-2026 The stable waveform from power-up seen on the Rigol DS1102 oscilloscope fits quite well with how a rubidium standard works. The 10 MHz oscillator itself can start immediately and…
Voltage between lock status pin and signal ground pin 7 on 5650A with 4k7 pull-up resistor to +5V source immediately after stsrt-up: Voltage remains at level above until the power…
Getting My FE-5650A Rubidium Frequency Standard Working The Important Discovery I discovered that my particular FE-5650A CPOM / Option-58 rubidium frequency standard requires both +15 V and +5 V power…
The seller of the 5650A I purchased has come back to me with following information: FE‑5650A (Rubidium Frequency Standard, DB‑9 Connector, CPOM / Opt‑58) 1. DB‑9 Pin Assignment (DB9 Male…
The oscilloscope inputs use BNC and my RF devices mostly have SMA, including my new rubidium time source, which I am currently testing.
The official February 1998 FEI FE-5650A manual gives the following option numbers. Importantly, these are options that could be combined, rather than 40 completely separate models. Option FE-5650A variant /…
Produced for me by ChatGPT – I do not know its accuracy. In addition, there are many variants of the 5650A so you need to find way to confirm layout…
Yes. The lower connector in your photograph is a 9-pin male D-subminiature connector, commonly called DB9/DE-9 male. So the mating connector you want for making a power lead is a:…
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