620-630 MHz. blocked?
 

Can anyone offer a reason why 620-630 MHz. would be blocked on a
VR-500? It clearly is not a cellular range. Thanks.

Maybe it's not intentionally blocked...just not enabled. What I mean is,
many scanners do not have true, continuous coverage. They have portions of
the spectrum left out, because there is nothing in that range to listen to.
I'm not aware of anything that would be using those frequencies, 620~630MHz.
I think they do this in an effort to optimize the receiver for the areas of
the spectrum that it does cover. I used to think they were left out, to
prevent us from finding out what's really going on, in those frequencies.
However, having true, full coverage receivers/scanners, I found they were
void of any activity.

Bill Crocker


"victoria patel" wrote in message
om...
Can anyone offer a reason why 620-630 MHz. would be blocked on a
VR-500? It clearly is not a cellular range. Thanks.

On Sat, 07 Feb 2004 05:59:59 -0800, victoria patel wrote:

Can anyone offer a reason why 620-630 MHz. would be blocked on a
VR-500? It clearly is not a cellular range. Thanks.

The FCC won't permit a scanner to be sold in the USA unless it
can reject cellular telephone signals by a 38 dB margin, no matter
to what frequency the radio is tuned.

The VR-500, VR-120, and other radios block frequency ranges
in which they would not be able to attenuate cell signals
sufficiently to meet FCC specs.

The lack of selectivity is a shortcoming in their design.

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