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Test Results for 195, 240 and 400 Cables

 

WRITTEN BY: Peter Martin 
Monday, February 28, 2011  RssIcon

 
 


Test Results for 195, 240 and 400 Cables

195
195.jpg


240

240.jpg



400

400.jpg



15 metres of 400 cable , N male conns each end.     N30N30-400-15000

15m_400.png

Loss at 2.45 GHz  = 3.8dB

This measurement is consistent with 0.22dB loss per metre and 0.25dB for each connector. 

(15 x 0.22) + (2 x 0.25) =  3.8dB.


Comment on measuring loss in long cables using a VNA.
Slow down the sweep time until you get a consistent measurement! I found this out the hard way myself, and, nearly always, whenever customers have challenged the specs on supplied cables it has turned out to be a measurement issue.


Peter Martin