Scott,

Your question brings much complication to a matter that should be easy
to answer. I'll do my best to avoid getting bogged down in the
explanation.

The transmitter has a very long range, much longer than 90 feet. I
believe the dogs collar hears the signal for a very long distance.
But, that the collar does not issue a correction if the dog wanders
past the range of the transmitter. If the collar acted in this manner,
it would preclude the dog from RE-ENTERING the protected area from the
outside of the 90 foot range.

In order for the collar to initialize, it must hear the transmitter
(initially). If the transmitter is turned off, and the collar is
turned on, no corrections are issued.

Also, if the collar is properly initialized and operating, abruptly
turning off the transmitter DOES NOT result in a correction being
issued. Corrections are only issued IF the dog is in the intermediate
zone, which appears to be a 3 foot wide area.

This type of operation is necessary to safeguard the dog, even though
it complicates the hardware some.

At 16 kilohertz with horrendously inefficient transmitting antennas, I
doubt there would be an FCC problem, especially with a modest boost in
ERP. The Earth and the solar system generates much noise on those
frequencies as well, we could probably increase the transmit power
quite a bit without creating problems.

Hope this helps.

A



On Tue, 29 Mar 2005 12:09:27 +0000, Scott
wrote:

I auume these thing work in reverse of conventional thinking. I assume
that as long as the receiver is receiving a signal, the dog does not get
shocked. If it strays too far and the receiver loses the signal...ZAP!
However, modifying the transmitter would violate its Part 15
certification and the owner might be the one to get the ZAP (from the
FCC)...

Scott