User Manual

14
The Unit may be connected to a regulated DC power supply or a backup battery.
The DC source or battery backup system is connected to the unit through the DC
power inlet at the rear of the unit (see rear panel view).
Caution: Before you make the connection, ensure the DC power supply or battery
backup system is capable of supplying a minimum of 200W, and check if the DC power
supply has current limit. Since high current consumption is required for transmitting,
improper setting of the current limit may cause transmission failure.
Caution: The unit is to be connected to a battery that is in accordance with
applicable electrical regulations for the end use country. If battery power is exhausted, you
are recommended to charge the battery with an external charger. Remove the battery
from the unit when charging.
RF Antenna Connections
TX and RX antennas are connected to two separate connectors (shown in the rear panel
view), and there must be adequate isolation of 75 dB UHF or 85 dB VHF between them. If
only one antenna through a duplexer is connected, at least 75 dB UHF or 85 dB VHF
isolation between the TX and RX antenna ports is required.
Caution: Please ensure that all power is switched off before disconnecting the TX
antenna.
1. Duplexer Selection
The selection of duplexer is critical to system performance. The use of a notch (band
reject) duplexer is possible in some systems that are not located at high RF density sites.
If the unit is used in high RF density sites, the use of a pass-notch duplexer is
recommended.
The duplexer must be able to handle at least 50W continuously. For the best system
performance, the insertion loss should be less than 2dB.