• L-Band High Power Amplifier 400W DHPA 1670X Front Angle
  • L-Band High Power Amplifier 400W DHPA 1670X Rear Panel

L-Band 400W Power Amplifier

Download Specifications

Product Features


  • Digital ready LDMOS PA provides 400 Watt output for broadcast of digital waveforms
  • Fully protected against input overdrive, temperature and output load VSWR conditions
  • Integrated AC/DC power supply
  • Variable speed DC fans
  • Remote control and self monitoring via RS485 interface
  • Minimum operational life expectancy of 10 years


Product Description


The DHPA 1670X is designed to operate as a final amplification stage for a terrestrial L-Band transmitter or repeater system.  It amplifies an L-Band input signal to a digital average output power level of 400 Watts, while maintaining its linear characteristics.

The DHPA 1670X architecture is based on a solid state design operating in Class A/AB linear mode over a frequency range of 1670 MHz to 1675 MHz.  The amplifier is protected against input overdrive and overheating.  The protection circuits are all self correcting, allowing the amplifier to be restored to its normal operating state upon removal of the fault condition.

The DHPA 1670X incorporates an internal automatic self leveling loop to maintain constant a constant output power level over the life of the equipment.  The automatic level control (ALC) circuit will compensate for the input signal level variations and the gain variations caused by changes in temperature as well as for the gain change due to devices aging. Depending on the application, the amplifier can be configured to operate in AGC mode, maintaining a constant gain value. The amplifier’s operational parameters are monitored and controlled by an embedded system controller that can be accessed from the RS485 and USB interfaces.

The DHPA 1670X is a field replaceable system component that includes an integrated AC/DC power supply and is designed for indoor installation.   The amplifier is forced air cooled using two high performance variable speed (temperature controlled) fans, which are installed on the amplifier enclosure front panel.

All of the amplifier’s components are enclosed in a standard 19” rack mount chassis, occupying 5 RU of cabinet space.

Frequency Band

L Band

Frequency Range

1670 MHz – 1675 MHz



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