User's Manual

User Manual
Page 2 of 8
2. INSTALLATION
2.1 INSTALLATION INSTRUCTIONS
The amplifier is designed for installation in a rack that permits access to the rear of the rack for
connection of DC power, RF, and monitor/control cables. The amplifier must have a minimum of
3 inches of open space in front and to the rear of the chassis to allow adequate air flow and
ventilation.
To install the amplifier proceed as follows:
1. Mount the amplifier in equipment rack and secure in place.
2. Connect a properly sized 50 ohm cable and load (antenna) to the RF OUT connector on
rear of amplifier.
3. Connect the transceiver/exciter output to RF IN connector on rear of amplifier.
4. If monitoring of PA is desired, connect alarm cable to MONITOR connector on rear of
amplifier module. See section 3 for more details about monitor pins.
5. Connect ground wire to ground stud on rear of amplifier if desired.
6. If unit is the 48 VDC version, measure primary DC input voltage of power supply. DC
input voltage should be +48 +/- 0.5VDC. Turn off DC voltage.
NOTE:
• Make sure power supply DC is well filtered and well behaved with minimal
voltage overshoot.
• Keep DC wires as short as possible to minimize inductance induced voltage
transients.
• Size DC Wires properly to handle the load current to minimize voltage drop.
WARNING: Turn off external primary DC power before connecting DC power cables.
7. Connect positive primary power wire (+48VDC) to terminal marked +48VDC and negative
primary power wire to GND terminal next to it on rear of amplifier.
8. Check your work before applying DC voltage to the system. Make certain all connections
are tight and the DC wires are going to the correct terminals.
9. If the unit has the optional power supply: Connect unpowered AC cord to AC plug on
rear of amplifier.
10. Refer to Section 2.2 for initial start-up procedures.
2.2 INITIAL STARTUP
To perform the initial start-up, proceed as follows:
1. Check to ensure that all input and output cables are properly connected and tightened.
Note: Use high quality coaxial cable and connectors. Properly install all connectors for reliability.
CAUTION: Before applying power, make sure that the input and output of the amplifier are
properly terminated in 50 ohms. Do not operate the amplifier without a load
attached. Refer to Table 1-1 for input power requirements. Excessive input power
will damage the amplifier.
NOTE: The output coaxial cable between the amplifier and antenna must be 50 ohm cable
and adequately sized to handle the rated power level with additional stresses from
high VSWR taken into account.