[Scan-DC] FFX County Analog

Fri, 01 Feb 2002 15:04:56 -0500

I wonder if that is what is causing the continuous sporadic
noise I hear on the new FFX system?  I hear it on every channel,
analog or digital, anywhere more than 5 miles away from
Merrifield.  The weird thing is I *never* hear it on the
old analog repeaters, even when 15 miles away from them
(and they likely have less power to start with).  On the
control channel and the digital channels it sounds like
an intermittent "zinging" effect, on the analog transmissions,
it just sounds like distortion.  On a scope they look like noise
spikes to the edge of the discriminator bandpass (both ways),
with some distortion of the waveform, as if the transmitter
output was suddenly reduced, or sudden multipath interference. 
It's happens on all 20 channels, yet other systems inbetween 
(like the old analog systems) don't ever have this characteristic. 
I'm still analyzing it to determine if it's a receiver problem 
(local interference) or if it's really coming out of the 
transmitter that way.  If it is, it could be seriously degrading
system performance in marginal areas.

KL

Bote Man wrote:
> 
> Don't discount the possibility that your receiver is being
> overloaded by the finely tuned base stations used by Nextel.
> They might say "Motorola" on them, but numerous sites emit
> broadband noise.
> 
> When I have trouble hearing Fort Lauderdale's trunked system
> I kick in the attenuator on my scanner and it clears right up!
> So, it might not be weak signal but rather a high noise floor
> doing it.
> 
> Bote
> 
> > -----Original Message-----
> > From: [email protected]
> > [mailto:[email protected]]On Behalf Of Lee Williams
> > Sent: Wednesday, 30 January, 2002 15:29
> > To: [email protected]; [email protected]; [email protected]
> > Subject: Re: [Scan-DC] FFX County Analog
> >
> >
> > It is used and it does has lousy reception. The transmitter is at
> > the coast
> > guard station on Telegraph rd. The reason Fairfax County went to
> > a trunked
> > radio system was to greatly improve the radio reception throughout the
> > county. Unless you are within approximately 5 to 10 mile radius of the
> > transmitter you are absolutely correct, reception of these grequencies
> > were/are lousy!
> 
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