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Why is the DL7100 passive probes bandwidth only 400 MHz?

April 26, 2017bandwidth dl7100 MHz passive probe

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Why is the DL7100 passive probes bandwidth only 400 MHz?

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At frequencies above 300 or 400 MHz, the capacitive loading of a passive probe can be a significant load on the circuit under test. For best results at the higher frequencies it is best to use a FET probe which will have a much smaller capacitive load.