When handling the TTU-2820’s™ main-board (i.e. sub assembly) by itself or in a partial
housing proper ESD precautions should be taken. The handler should be in an ESD safe
area and be properly grounded.
GPS Ceramic Patch Handling
When handling the sub assembly it may be natural to pick it up by sides and make
contact with the antenna boards. In an uncontrolled ESD environment contact with the
center pin of ceramic patch antenna can create a path for electrostatic discharge directly
to the GPS Module. The GPS Module is very sensitive to ESD and can be damaged and
rendered non-functional at low levels of ESD.
One should avoid contact with the center pin of the patch during handling. The Factory
will be placing a protective layer of Kapton® tape over the patch element to eliminate
this ESD path.
Packaging
Anytime the sub assembly is shipped and it is not fully packaged in its final housing it
must be sealed in an ESD safe bag.
Electrical Over-Stress (EOS)
The GPS receiver can be damaged if exposed to an RF level that exceeds its maximum
input rating. Such exposure can happen if a nearby source transmits an RF signal at
sufficiently high level to cause damage.
Storage and Shipping
One potential source of EOS is proximity of one TTU-2820™ GPS Antenna to another
TTU-2820™ GSM Antenna. Should one of the units be in a transmit mode the potential
exists for the other unit to become damaged. Therefore any TTU-2820™ GPS Antenna
should be kept at least four inches apart from any active TTU-2820™ GSM Antenna or
any other active high power RF transmitter with power greater than 1 Watt.
] 3.1.2 Battery Back-up devices
Please properly dispose of the battery in any of the CalAmp products that utilize one, do
not just throw used batteries, replaced batteries, or units containing a back-up battery into
the trash. Consult your local waste management facility for proper disposal instructions.
