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Mismatch between ATU and SSDR SWR readings
Here is my setup: Flex 6400, MFJ993b auto tuner, 18" RG213 coax between Flex and ATU, 18" RG213 coax connecting the dummy load to the flex
The following test setups for SWR readings:
(1) Flex connected to ATU connected to dummy load. ATU shows 1:1 swr, SSDR shows 1:1.7 swr
(2) Flex direct into dummy load. SSDR shows 1:1 swr
Per these results I suspect the coax between the Flex and the ATU. There is another discussion thread on this topic-- https://community.flexradio.com/discussion/comment/19995809#Comment_19995809 where the solution was the coax cable between the Flex and ATU was lengthened.
(1) Am I correct to suspect the coax between the flex and the ATU?
(2) Are there additional things I can/should check?
(3) if trying to increase the length of the coax is something to try, how long of a cable should I try next?
Thank You in advance for reading this and your suggestions.
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