Posts tagged ‘OCXO’

Reverse Engineering a Wavetek OCXO Board

I bought a Wavetek OCXO board a long while ago. My original plan was to remove the onboard crystal oven to replace the broken OCXO in my HP 5350B. But since I later managed to fix the original OCXO , this board had been sitting quietly in one of my component bins collecting dust. Continue reading ‘Reverse Engineering a Wavetek OCXO Board’ »

HP 8642B Backlight Mod

If you take a look at the picture below, you may recognize immediately that it is a picture of an HP 8642B synthesized signal generator. But if you take a closer look, you probably will notice something different if you have ever used an HP 8642B before. Continue reading ‘HP 8642B Backlight Mod’ »

HP 5350B OCXO Repair

Last time, I did a teardown of an HP 5350B microwave counter. And as I mentioned in my teardown, the oven-controlled crystal oscillator (OCXO) did not appear to be working as the OVEN indicator would not go off even after hours of use but the counter appeared fully functional otherwise. So I decided to disassemble the crystal oven and see if this problem can be fixed. Continue reading ‘HP 5350B OCXO Repair’ »

HP 5350B Microwave Counter Teardown

Here is a teardown you do not see very often. I recently bought an HP 5350B 20 GHz microwave counter off eBay. HP 5350B uses harmonic heterodyne down-conversion technique to convert the microwave frequency into the range of its internal low frequency counter. It can measure frequencies from 10 Hz all the way up to 20 GHz via two separate inputs. Continue reading ‘HP 5350B Microwave Counter Teardown’ »