CalAmp GUARDIAN User Manual - page 12
Guardian Manual 001-5006-000 Rev 0
12 |
P a g e
Table 1-4 – Pin-Out of the Power Connector
Contact #
(Left to Right)
Color
Description
4
Fan Power Output (5V)
3
Black
Ground
2
Red
Positive (10-30) VDC
1
White
Enable
(See Note)
NOTE: The White Enable line must be tied to the red positive lead of the connector for the Guardian to power up.
Bringing the Enable line low is a request for the unit to power down. If the unit is writing to any non-volatile
memory, it will complete the operation before powering down. It is highly recommended that you use the Enable
line to power up and power down the radio.
1.4.6 ANTENNA CONNECTOR
The standard Guardian has a 50-ohm TNC female antenna connector. This connection functions for both transmit
and receive.
The Dual-Port and Full-Duplex Guardian have a 50-ohm TNC female antenna connector functioning for transmit
(only) and a 50-ohm SMA female antenna connector functioning for receive (only). The separate receive antenna
connector allows for unique customer applications that require additional receive filtering, external PA(s) and
other options.
Warning: The transmit antenna port must not be connected directly to the receive antenna port of the Dual-Port
or Full-Duplex Guardian. Excessive power into the receive antenna port will damage the radio. Input power to
the receiver should not exceed 17 dBm (50mW).
To reduce potential interference, the antenna type and its gain should be chosen to ensure the effective isotropic
radiated power (EIRP) is not more than required for successful communication.