On 9/6/2014 9:36 AM, Wayne Burdick wrote:
Hi all,
There seems to be some debate about how much FM deviation is required
for PL tones used to activate repeaters. There's a wide range of
deviation values in use by transmitters, and various "standard"
recommendations. The question is how much is needed for reliable
operation in the real world.
The Cactus-Intertie [ask Eric] is 500 Hz deviation on 440 remotes. Audio
deviation is 4-5 KHz, usually around 4. Link audio is flat. None of the
420 Nor-Cal links use PL, but those that do elsewhere are nominally at
400 Hz PL/4 KHz audio deviation. Any site with PL on an incoming link
filters it out before going into the audio switch matrix.
Cactus works amazingly well, even with a half-dozen or more link segments.
73,
Fred K6DGW
-- No. Calif. Cactus Radio Assn. [NCCRA]
-- Affiliate of the Cactus Intertie
-- www.nccra.us
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