I've received a question about compatibility of 50 ohm BNC male
connectors with the 75 ohm female BNC connectors on Exetron's ADA 6
300MX video distribution amplifier.
Amphenol makes the following statement about 50 and 75 ohm BNC connectors:
"Two distinct types of 75 Ω BNC's are available, and both mate with each
other and with 50 Ω BNC's. Type 1 is designated 75 Ω BNC-T1 and provides
constant 75 Ω performance with low VSWR DC 4 GHz. Type 2 is designated
75 Ω BNC-T2 and is usable with low reflection DC - 1 GHz. For
applications above 1 GHz, Type 1 is recommended. "
Unlike BNC connectors, however, please remember that 50 and 75 ohm Type
N connectors are not mechanically interchangeable and that physical
damage results when a 50 ohm N male connector is inserted into a 75 ohm
female N connector.
I've added more details on using an ADA 6 300MX to distribute timing
signals in today's update. http://www.cliftonlaboratories.com/Updates.htm
Jack K8ZOA
www.cliftonlaboratories.com
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