NEC-LIST:NEC-BSC question

I have a question for any NEC-BSC experts out there:

I am defining a source and receiver with the SI and RI commands. To get the
coupling, I set PR to option 3 and then use the PN command (in rectangular
coordinates). Is the PN origin set with respect to the receiver location?
Workbench shows that the PN scan is with respect to the model origin, but
that doesn't appear to be the case. If I use PN with the origin at (0,0,0)
and scan one point at (0,0,0), it doesn't matter where my source and
receiver are as long as their separation and orientation remains constant. .
What I want to do is use PN to get the field at one point (the receiver
location).

Also, I would like to compare my results with the free space loss equation
as a function of either distance or frequency:
        Loss= 37 + 20Log_10 (freq in MHz) + 20 Log_10 (distance in miles).
My results show identical curves except for an offset (and a minus sign,
which is irrelevant). I'm trying to determine a physical reason for the
offset.

I'm using version 4.2.

Fred B. Brown, II
405-739-1915
Nuclear Survivability/Vulnerability Engineer/Scientist
Boeing Aerospace Operations

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