I beg to differ . I am currently sweeping both forward and return on upgraded 550 OCE to 750.
 Per C-Cor Internal test ports are non bidirectional. You must use the EXTERNAL test port to sweep your return.
 I have also tried and you can not get your return to come up using the internals.
 I am sure you have the 2 mixed up.
    
    mt30ys MMM don't think so
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