Forums › VSG Series Discussions › VSG60A With External Reference
- This topic has 1 reply, 2 voices, and was last updated 2 months, 2 weeks ago by Andrew.
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Devin KellyParticipantHi,
I’m trying to use the VSG60A with an external 10 MHz reference. Looking at the Signal Hound linux software package I can’t find a way to confirm that the VSG60A is locked to the external reference.
When I check the “Ext Ref” box on the software the VSG60A generates a signal whether I supply the reference or not. I do notice the spectrum of the signal I generate is a few Hz closer to my intended signal when I supply the reference. When I test without the reference signal I unplug the connector.
Thanks for your help!
Devin
AndrewModeratorHi Devin,
The VSG60 does not provide indication or feedback that an ext reference is present, other than simply exhibiting a large frequency error (in my bench VSG60, the freq error is 38ppm without an ext ref to lock to). Maybe this freq error is enough to detect?
I apologize for the inconvenience.
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