The P1 Zone Speed Transmitter™ is installed in fixed location to
define a geographical speed zone. The location is typically
chosen at a boundary between 2 speed zones. Each P1 Zone
Speed Transmitter™ module has 2 individual transmitters. One
of the transmitters broadcasts a speed zone in one direction. The
other broadcasts another speed zone in the opposite direction. A
Zone Speed Receiver™ that is exposed to these zone speed
broadcasts is able to detect the zone boundary, and change the
allowable maximum speed as it transitions from one speed zone
to another.
Each of the 2 transmitters in the P1 Zone Speed Transmitter™
module is capable of transmitting 4 different zones. Only 1 zone
can be transmitted by each transmitter at a time. The specific
zone that each transmitter in the P1 Zone Speed Transmitter™
module is transmitting is programmed with a single button during
power-up. The single button is located next to a numeric display
on the P1 Zone Speed Transmitter™ module. The numeric
display indicates the current zone selection. It also shows the
selected zone during programming. The display only shows the
zone information during power-up/start-up to conserve power. A
Green Status OK light Indicates that everything is working
during normal operation. The green status light is blinking with a
relatively low duty cycle to conserve power.