FM Band Transmitter Specs - RF Cafe Forums
Post subject: FM Band Transmitter Specs Posted: Tue
Oct 11, 2005 4:33 pm
Joined: Tue Jan
06, 2004 1:51 pm
Sorry for posting in multiple places,
but I need this in a hurry.
Does anyone know exactly what
FCC spec governs the output of an FM transmitter? My application
is for low power (<1 W), and in fact will be covered by Part
15. However, I want to know the real specification limits for THD,
frequency accuracy, L-R channel separation, S/N, etc.
spent a couple hours searching the web and the FCC website but CANNOT
Thanks a lot guys (and gals, if applicable ).
Post subject: FM SpecsPosted: Wed
Oct 12, 2005 5:23 pm
The FCC has only a few real regulations
for license-free ("Part 15") use:
1. less than 100 mW power
2. inside the FM band, and harmonics down a reasonable amount (I
don't know what it is right off the top of my head.
is up to you. If you want to make a crappy Part 15 stereo transmitter
with lots of distortion, poor frequency response, almost no separation,
etc. , the FCC won't quibble unless you go outside the band or power
limits. If you want to make a state-of-the-art DSP-based stereo
transmitter, the FCC won't quibble unless you go outside the band
or power limits.
Broadcast station limits are something else.
You might look at those for THD, separation, frequency response,
distortion, etc. if you want a baseline for comparison.
know these answers are not what you were hoping for - but they do
reflect the regs.
Post subject: Posted: Thu Oct 13, 2005 7:42 am
Joined: Tue Jan 06, 2004 1:51 pm
for the infoGuest. Morton provided the documents I was loking for