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Products => Test Equipment => Topic started by: eti on January 24, 2022, 10:27:38 am

Title: OWON HDS272S mishap
Post by: eti on January 24, 2022, 10:27:38 am
Do you think the waveform generator of my OWON HDS272S has input protection?!

I accidentally hooked up 12VDC to the waveform (function) gen socket.... PSU was limited to 1A - heard a faint click, and on subsequent connections (mistake of course) but it still outputs just fine!
Title: Re: OWON HDS272S mishap
Post by: Grandchuck on January 24, 2022, 12:48:39 pm
Does the output amplitude decrease when loaded?  If the output impedance is 50 ohms, it should be able to supply half the amplitude to a 50 ohm load.  That would be a test you could  make.
Title: Re: OWON HDS272S mishap
Post by: eti on January 24, 2022, 09:03:53 pm
Quote from: Grandchuck on January 24, 2022, 12:48:39 pm
Does the output amplitude decrease when loaded?  If the output impedance is 50 ohms, it should be able to supply half the amplitude to a 50 ohm load.  That would be a test you could  make.

Thanks. It seems fine - here's a 47R connected across the waveform gen (I'll call it func gen!): Purple trace = loaded, Yellow trace = open circuit
Title: Re: OWON HDS272S mishap
Post by: Grandchuck on January 24, 2022, 09:18:22 pm
Looks good.  The generator is probably OK 8)
Title: Re: OWON HDS272S mishap
Post by: eti on January 25, 2022, 02:18:55 am
Quote from: Grandchuck on January 24, 2022, 09:18:22 pm
Looks good.  The generator is probably OK 8)

Phew. I thought I’d maybe damaged my new scope 😂

Note to self: quadruple check ALL connections when doing late night tests.