User's Manual

60 Document Number: 0100SM1401 Issue: 05-15
Power Supply Requirements
Operating Voltage: 11 to 30V DC (Dual Input)
Input Power (Rx typical): 35 Watts
Input Power (Tx typical): (See table below)
In high ambient temperature situations, the internal fans may operate, resulting in an increase of input power of up to 28
Watts.
Typical receive/standby input power is 35 Watts. The input power will vary in
transmit mode according to RF output power level.
The QP450 is supplied with a lock-in mating DC power connector which should be
installed with the locking screws done up tightly (0.5 - 0.6 Nm / 4.42 - 5.31 ftin ).
The radio is designed to limit damage if the voltage exceeds the operating voltage
or if reverse polarity is applied. The field replaceable internal fuse has a 12 Amp
rating.
Connect and secure the Antenna, Ethernet and Serial connectors BEFORE applying power to the unit. Lastly, before inserting the
power connector, re-check that the polarity and voltage is correct using a multimeter and check the power cable against the +/-
label printed on the rear panel of the radio.
Tx Power (dBm)
Typical Input
Power (Watts)
30 55
37 71
40 85
NOTICE
HAZARD OF EQUIPMENT DAMAGE
The radio modem can be damaged if there is any potential difference between the
chassis-ground, RS232 signal ground, power (-) input, or antenna coaxial shield.
Before connecting any wiring, ensure all components are earthed to a common
ground point.
Failure to follow these instructions can result in equipment damage.
Part F – Quick Reference Guide