Jim H wrote:
On 21 Jul 2016 16:33:11 GMT, in ,
Rob wrote:

ALisha Hohman wrote:
Nope. It doesn't use any wires. It creates an up to 90ft radius around wherever the transmitter is placed. If you look further up the thread, I posted the product page from home depot's website.

I would think such a system can never have a clearly defined boundary
unless it uses advanced techniques like roundtrip time measurement of
a radio signal. The "range" of the signal depends a lot on obstacles etc.

In this configuration it should be able to locate the dog in a 90ft radius,
but that is of course not very helpful when you want to locate it in
a neighborhood.

No!

The collar is receive only. When the dog gets outside the range of the
transmitter the collar sounds a tone and shocks the dog until the
signal is again received or for 30 seconds, whichever is greater. It's
all in that manual she posted a link to.

I thought the collar would beep loudly whenever it gets out of range,
so it would be possible to force it to beep by trigger that beeping
action using the portable transmitter. As there has been discussion
of such a system before that operated using a buried wire loop around
the area to be protected, I thought a "portable" loop could be made
and carried around.

However later she explained this beep is only faint (maybe mainly
ultrasonic) so this would not be a practical approach.