[R-390] Signal to Noise Ratio Test and Fld Chg 5

[Larry H]

Hi all,  I just finished writing a small doc that explains why the R-390A
Navy Tech Refs and the Y2K R3 Tech Ref specify the input to the R-390A in
the Signal to Noise Ratio Test procedure to use the 'Unbalanced'  input.  I
also explain why Navy Field Change 5 was necessary.  And, I documented my
recommended Signal to Noise Ratio Test procedure.  It's at the end of the
References section.  Here's a direct link to it: R390A Measuring Sig to
Noise Ratio.pdf (r-390a.net)
<https://www.r-390a.net/R390A%20Measuring%20Sig%20to%20Noise%20Ratio.pdf>.
Enjoy.

Regards, Larry