|Ltl Acorn 6210MMX|
The general consensus is that these cameras need three to five bars to operate reliably and a high level signal requirement is stated in the manufacturers manual. In operation they are much like mobile phones in that environmental and atmospheric conditions can cause the signal to disappear erratically; and particularly in the case of these cameras, if this happens at the moment the camera is trying to send, it's lost until the next time.
The location and distance of the cell mast, obstructions in the form of buildings, trees and other vegetation, plus atmospheric changes at night and day interface, will all make a difference.
I operate in a mountainous area from about 5 to 15 km from the cell tower and over all of it, it's mostly impossible to get a workable signal; and at frequencies around a 1000 to 2000 MHz, signals bounce of buildings, rock faces, foliage et.c to further compound the situation.
I received the following comment from Keith In Fort Ashby WV USA
which sort of sums it up."Just ordered one of the Ltl cellular products. Checked yesterday & I have 1 bar of service at the installation site...so I anticipate installing an external antenna (possibly with amplifier) rig.
Stateside, Wilson Electronics is a great retailer for this type of product (already have one of their exterior/interior rigs installed for internet access over an aircard--went from 2 bars to 5).Thanks for the comparison link on the Ltl/Bushnell product line, as well! "