OK, let me try rephrasing the question.

In court, the officer said "The Golden Eagle radar takes the guess work out of the equation because it never produces false speed readings and displays "ERR" if the radar is not reading a moving vehicle."

Since Kustom Signals claims on their website
It is the policy of Kustom Signals, Inc., a private corporation, to not discuss any information concerning the internal functions or general operation of our radar and laser based speed measuring devices or any specific traffic situations.

Kustom Signals does sell operator's manuals (U.S. only) for specific models of radar and laser equipment. To obtain a manual, a signed court subpoena is required. The fee for the manuals varies by model, from $30 to $45 plus $5 shipping and handling. Manuals are shipped via U.S. mail. These manuals are protected under the federal copyright protection act and cannot be copied and are non-returnable.

Operation manuals describe how to setup and test the equipment. They do not discuss field operation or how the equipment responds in a specific situation. These are training issues and not covered in this manual.
How can you possibly defend against a cop who would say something like this? Obviously paying for a manual won't help since it's only an installation manual.