USER MANUAL HMS SERIES RF POWER AMPLIFIER 3370 SAN FERNANDO RD., #206 LOS ANGELES, CA 90065 TEL: (323)256-3000 FAX: (323)254-3210 www.tplcom.
TABLE OF CONTENTS PRODUCT DESCRIPTION .................................................................................. 2 GENERAL SPECIFICATIONS.............................................................................. 2 OPERATING PRECAUTIONS.............................................................................. 3 INSTALLATION .................................................................................................... 4 MAINTENANCE .......................................................
PRODUCT DESCRIPTION The HMS series of TPL power amplifiers are intended for use in base station or repeater applications. They are high power units and in various configurations cover the frequency range extending form Low Band VHF to 960 MHz. An HMS series RF power amplifier is a self contained unit which allows operation, metering, and remote monitoring of all parameters of an RF power amplifier.
CAUTION! Check the amplifier upon receipt for visible damage. If any is noticed, please call TPL at 800 HI POWER to request an RMA number (Return Material Authorization). If purchased through a dealer, ask them to follow this procedure for best results. EXPENSIVE COMPONENTS MAY BE DESTROYED IF THE AMPLIFIER IS TURNED ON IN A DAMAGED CONDITION. OPERATING PRECAUTIONS CAUTION: This amplifier produces RF voltages that can cause painful and dangerous RF burns.
INSTALLATION This unit is designed for mounting in a standard nineteen inch rack. When picking a location in the rack, considerations must be given to the lengths of the RF coaxial cable, as well as cooling. Mount the unit where dust and other debris are not likely to clog the cooling fans. Avoid mounting the amplifier directly above hot pieces of equipment that could artificially raise the amplifier temperature.
METERING AND INDICATORS The following signals and voltages are indicated on the front panel HMS status meter, (a liquid crystal display). The parameters to be monitored are selectable via the front panel momentary contact toggle switch. The status meter has two lines of text. The top line indicates the parameter to be measured while the bottom line indicates the measured value and its units. Refer to the front panel drawing in the illustrations section for the location of the meter and switch.
Metering and Indicators (Continued) LOPWR . . . . . . . . . . . . . . . . . . . . . . Flashing red alarm LED when RF output power is below an internally preset level. FANS . . . . . . . . . . . . . . . . . . . . . . . . Flashing red alarm LED when a fan failure occurs. OPERATOR ADJUSTMENTS The operator can turn the main power on or off with the switch located in the lower right hand corner of the front panel.
Operator Adjustments (Continued) P1 This is a basic power adjustment for the unit. It is a 10 turn potentiometer which sets the RF output power level. Changing its setting may require resetting all other adjustments. To make this adjustment it is necessary to monitor the output with a calibrated RF power meter. As a reference, set the adjustment to produce nominal RF output. P5 Lower the RF input drive (from its nominal level) until the RF output drops to its lowest acceptable value.
REMOTE MONITORING The monitored functions are described in other sections. These same functions, some of which are displayed by LED’s on the front panel, are available in the REMOTE MONITOR DB-25 connector on the rear panel. The ouputs are as follows: Table 1 Monitor Signals Function Pin Signal Definition Source Mode INS 2 Input RF Power Source R=5K Analog PRS 3 Reflected Power Source R=5K Analog 5V=600W ------ VDS 4 Driver Voltage Source R=5K Analog 0.
APPENDIX 1 FRONT PANEL METER READINGS DATE FWD PWR RFL PWR RF DRIVER FINAL A INPUT V V CURR Page 9 B CURR TOT CURR
HMS ILLUSTRATION FRONT VIEW REAR VIEW Page 10
TOP VIEW Page 11
WARRANTY TPL COMMUNICATIONS has tested and found this unit to function properly and to operate within the parameters of its stated specifications. TPL COMMUNICATIONS warrants that this product is free from defects in material and workmanship. If found to be defective within two (2) years from the date of purchase the factory at its discretion, will either repair of replace the unit at no cost provided the unit is delivered by the owner to the factory intact.
