On 11/28/2023 6:46 AM, Andy Durbin wrote:
Isn't it true that the KAT500 USB cable uses RS-232 protocol but TTL signal 
levels?  T

RS-232 is NOT a matched transmission line -- it's a low-Z source and high-Z input. The limitation on line length is not signal strength, but rounding of the pulses by cable capacitance.

73, Jim K9YC


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