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50 ohm inputs for Siglent SDS1104X-E

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joeqsmith:
Another thread discussing this topic.
https://www.eevblog.com/forum/testgear/inexpenive-50-ohm-feed-through-terminations/msg5227260/#msg5227260

the_cake_is_a_lie:
Is there any advantage of using those adapters over a BNC T adapter with one end fitted with a 50 ohm terminator? That's what I have and the combination is slightly cheaper. Maybe the adapters are more convenient and that's enough justification.

CharlotteSwiss:

--- Quote from: Roger Need on December 31, 2023, 06:07:41 pm ---I bought several of these P57 adapters to use with my Siglent 1202X-E.

They work fine for me up to 400 MHz with this scope.

Here are some tests I did on two of them with a NanoVNA.  Return loss looks good to me and the traces from the two overlap well so there is not a significant difference between the two units.

Roger

--- End quote ---

My 1202 is 200Mhz, but I see there are 1202 that go up to 400Mhz?  ::)

tautech:
Charlotte, while a 200 MHz DSO might display a 400 MHz signal the amplitude will be very reduced so measurements of such will never be representative.

CharlotteSwiss:

--- Quote from: tautech on January 01, 2024, 12:56:15 am ---Charlotte, while a 200 MHz DSO might display a 400 MHz signal the amplitude will be very reduced so measurements of such will never be representative.

--- End quote ---

I thought not even an over frequency signal would detect it. Ok thanks for the information  ;)

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