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| DIY Injection Transformer for Power Supply Control Loop Response Measurements |
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| Kleinstein:
Usually there is not need for isolated probes. It is just that with that special scope (cleverscope) you have the option to use the isolated generator option instead of the injection transformer and a normal (grounded) generator. For a normal scope setup this is less of an option. It might be possible in the manual mode, as a very low cost option, to use an isolated (maybe even battery operated) generator - but this would be without special scope functions and one might still need the trigger signal to do at least multi period averaging. For the trigger a fast opto-coupler could be an option - so all the way down to DC. |
| r0d3z1:
--- Quote from: rx8pilot on October 12, 2016, 02:43:58 am ---I have been using a Jensen VB-1BB isolation transformer used for analog video. Not perfect, but not bad assuming that 10hz is not a necessity. It does ok down to rather low frequencies though. I paid $20 on eBay. BNC 75 Ohms in/out http://www.jensen-transformers.com/product/vb-1bb/ --- End quote --- This is a similar product: Model 0017CC (10 Hz to 5 MHz, 50 ohm to 50 ohm, BNC to BNC) by North Hills Inc. |
| rx8pilot:
--- Quote from: r0d3z1 on October 24, 2017, 10:55:11 am --- --- Quote from: rx8pilot on October 12, 2016, 02:43:58 am ---I have been using a Jensen VB-1BB isolation transformer used for analog video. Not perfect, but not bad assuming that 10hz is not a necessity. It does ok down to rather low frequencies though. I paid $20 on eBay. BNC 75 Ohms in/out http://www.jensen-transformers.com/product/vb-1bb/ --- End quote --- This is a similar product: Model 0017CC (10 Hz to 5 MHz, 50 ohm to 50 ohm, BNC to BNC) by North Hills Inc. --- End quote --- Interesting option. Strange that these are targeted to video applications but 50 Ohms. This model seems like a better fit than the Jensen Sent from my SM-G892A using Tapatalk |
| David Hess:
Picotest should redraw their diagram to be even more confusing. A 60 Hz AC current transformer can work as inexpensive injection transformer. |
| rx8pilot:
Picotest wants to get a lot of money for a transformer.... Sent from my SM-G892A using Tapatalk |
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