1 Purpose

The purpose of this document is to describe the functionality of a bike speed and a bike
cadence sensor and how to manually activate the sensors with having to mount them on a
bicycle. This is to aid in testing purposes of ANT+Sport PC applications and other
receiving devices.

2 Description and Configuration

The bike sensor may be configured as a bike speed or a bike cadence sensor by flipping a
switch located underneath the battery of the device. Setting the switch at SPD configures
the device as a bike speed sensor, whereas setting the switch at CAD configures the
device as a bike cadence sensor. Bike speed is used to measure the speed of a bicycle in
km/h based on the rotation of the bicycle wheel. Bike cadence is used to measure the
pedaling cadence in rotations per minute (RPM).

3 Activating the Sensor Manually

The bike sensors, configured either as cadence or speed, will be in an idle low power
mode until they are activated. During this time no measurements are taken and no ANT
communication channel is open to send information to another source. The sensor is
activated when a magnet is moved back and forth along a specific plane of the sensors.
The magnet supplied with the bike sensor is a small knob with a screw on one end
appropriate for mounting onto a bicycle spoke. For the purposes of manual activation, the
screw may be inserted all the way into the magnet. See below.

The magnet must be moved back and forth along a plane perpendicular to the bike sensor
in order to activate the sensor. The magnet must pass very close to the small notch
located on the top of the sensor. See figure below. A very quiet, but audible, clicking
sound should be heard if the bike sensor is being activated properly. This is the sound of
the reed switch inside the sensor being acted upon by the magnet. Once activated, the
bike sensor will start sending the proper ANT messages to a receiver.