| Products > Test Equipment |
| Upgrading Counter 53220A to Option 010 Ultra High-stability OCXO Timebase? |
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| carl_lab:
--- Quote from: Dr. Frank on November 19, 2016, 01:23:15 pm ---could you please also provide...output waveform (square wave or sine)? --- End quote --- Waveform is square 5Vpp, supply voltage 5V. |
| andyturk:
My project for the evening was opening up a 53220A with the standard timebase and dropping in an "aftermarket" OCXO. The specs on the Abracon AOCJY3A-10.000MHz-E seem pretty close to the original Vectron part used by Keysight, so I figured I'd give it a try. At worst, I'll have to open it back up and reverse the surgery. After replacing the oscillator and removing the two 0-ohm resistors called out on the silkscreen, the unit booted right up and passed its self test. It also registers the 010 option on the "About" screen. Surprisingly, it didn't complain about being out of calibration, but it was clearly off by ~2 Hz. I let it warm up for a while and calibrated it with 10Mhz from a rubidium source (PRS10). It seems to work well, although I'm not a time nut and don't have anything better than PRS10 to compare it to. |
| TheSteve:
Always good to have more options. I'd give this a try if I was looking for one - https://www.ebay.com/itm/181776010665 |
| HalFET:
Rubidium reference modules run <300 bucks from the surplus telecom stockpile these days. So it'd most like be cheaper to just strap one of those to the top of the unit and get that the rubidium reference certified. Added advantage is that marketing can then claim things were calibrated atomic clocks. |
| HighVoltage:
Great to know, that the replacement worked Thanks for this info, andyturk One of these days I will get a Rubidium standard as well. I just have no idea, which one to get, there are too many options. |
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