[Test-Equipment] Re: Test-Equipment Digest, Vol 48, Issue 14

[WA5CAB at cs.com]

Yahbut, it is the only significant FM parameter actually written into the 
regulations.  It determines the only functional differences between what you can 
legally operate below 29.0 MHz and what you can legally operate above.  It is 
in fact the regulation that forced the US Military to give up the Armor band 
between 20.0 and 27.9 MC.  It's why there was no replacement for AN/PRC-8 or 
RT-66/GRC.  Etc. etc.  So if you are going to operate FM, you should be familiar 
with it.  Plus it's another of those basic questions on the license exams 
that no one seems to know the answer to anymore (Fd max/Fm max).  Which was my 
point earlier before the bleeding heart liberals jumped in with both chintz 
slippers.

In a message dated 4/22/2008 8:35:18 PM Central Daylight Time, 
mrmanes at gmail.com writes: 
> FM modulation index is function of both peak deviation and modulation
> frequency.  It's not a terribly useful parameter where the modulation
> signal is broadband, e.g., voice.

Robert Downs - Houston
<http://www.wa5cab.com> (Web Store)
MVPA 9480
<wa5cab at cs.com> (Primary email)
<wa5cab at comcast.net> (Backup email)