CatEye Q3A - Manual (Page 7)

ENG-6
2.4 GHz digital wireless system
2.4 GHz-frequency digital wireless technology, which is the same technology used for
wireless LAN, is used for both the integrated speed/cadence sensor and the heart rate
sensor. This technology practically eliminates interference from external noise and
cross-talk with other wireless computer users, and enables you to store highly reliable
data. However, in a very rare occasions, objects and places may generate strong
electromagnetic waves and interference, which may result in incorrect measurement.
The following are potential sources of interference:
Should be especially careful while synchronizing the sensor ID. *
TV, PC, radios, motors/engines, or in cars and trains. •
Railroad crossings and near railway tracks, around television transmitting stations •
and radar bases.
Other wireless computers or digitally controlled lights.
•
Altitude measurement
The altitude is determined by detecting the change in atmospheric pressure using a
pressure sensor built in the wristwatch, which is then converted into elevation. For
this reason, the measurements may change even at the same location depending on
the change in atmospheric pressure caused by weather conditions. In addition, note
that there is a change of about 30 to 40 m during the early morning through the
evening even in stable weather. This unit may indicate incorrect measurements in the
following locations and/or environments.
When the atmospheric pressure and/or temperature change(s) significantly due to •
rapid weather change.
In a location where pressure is controlled, such as in an airplane.
•
The altitude measurement may change temporarily when the temperature changes •
suddenly, such as in cases of going outside from an indoor room. It will return to
the normal value after a while.
Important