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Hi,
I am having a look at making/buying/getting a 10MHz reference source and am looking at a few GPSDO (GPS disciplined oscillator, for those that dont know).
Justin, do you know of a good one, that is relatively inexpensive?
I’ve send enquiries off to Trimble, Microsemi and a few others. I see there are some relatively cheap units on ebay too…Anyone used/using one they can recommend?
Cheers,
Jared+13 dBm reference is fine for the SA44B (it will tolerate up to about +20 dBm). The circuitry prefers square for lower phase noise, but +13 dBm has a pretty fast slew rate, so it probably doesn’t matter much.
If frequency doesn’t have to be exact (+/- 0.1 ppb typical), you might be able to find a used LPRO Rubidium standard for $150 or so.
I have a Rb standard that I use for other pieces of test equipment. The Efratom ones are pretty good. It was an ebay purchase a few years ago, affordable enough that I bought a spare a few months later.
If you maintain a decent test bench and go the route of getting a Rb reference you will eventually find reasons to attach all sorts of 10 MHz devices to it. I use it on counters, scopes, frequency selective voltmeters and other analyzers.
I leave the Rb reference running all the time. It is even attached to a 24 VDC battery to keep it going during power glitches. With some additional devices I can do much of my own metrology and calibrate my own gear.
Tisha Hayes
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