Model: DHPA 250U
· 470 MHz - 860 MHz Broadband Amplifier
· Digital ready LDMOS PA provides 250 Watt output for broadcast of digital waveforms
· ALC or AGC mode of operation
· Touch screen display for real time user interface
· Remote control and self monitoring via Ethernet and RS485 interfaces
· Built in web server accessible through RJ45 connector with Internet Explorer
· Integrated AC/DC power supply
The DHPA 250U is designed to operate as a final amplification stage for a terrestrial UHF transmitter or repeater system. It amplifies an UHF-Band input signal to a digital average output power level of 250 Watts, while maintaining its linear characteristics.
The DHPA 250U architecture is based on a solid state design operating in Class A/AB linear mode over a frequency range of 470 MHz to 860 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 250U incorporates an internal automatic self leveling loop to maintain constant gain over the life of the equipment. The automatic gain control circuit will compensate for gain variations caused by changes in temperature and device aging. Depending on the application, the DHPA 250U can be configured to operate in ALC mode, maintaining a constant output power level.
The amplifier’s operational parameters are monitored and controlled by an embedded system controller that can be accessed from the touch screen LCD, Ethernet or RS 485 interfaces.
The DHPA 250U 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 four high performance 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 only “2RU” of cabinet space.
UHF Power Amplifiers Features
· 470 MHz - 860 MHz Broadband Amplifier
· Digital ready LDMOS PA provides 250 Watt output for broadcast of digital waveforms
· ALC or AGC mode of operation
· Touch screen display for real time user interface
· Remote control and self monitoring via Ethernet and RS485 interfaces
· Built in web server accessible through RJ45 connector with Internet Explorer
· Integrated AC/DC power supply
UHF Power Amplifiers Description
The DHPA 250U is designed to operate as a final amplification stage for a terrestrial UHF transmitter or repeater system. It amplifies an UHF-Band input signal to a digital average output power level of 250 Watts, while maintaining its linear characteristics.
The DHPA 250U architecture is based on a solid state design operating in Class A/AB linear mode over a frequency range of 470 MHz to 860 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 250U incorporates an internal automatic self leveling loop to maintain constant gain over the life of the equipment. The automatic gain control circuit will compensate for gain variations caused by changes in temperature and device aging. Depending on the application, the DHPA 250U can be configured to operate in ALC mode, maintaining a constant output power level.
The amplifier’s operational parameters are monitored and controlled by an embedded system controller that can be accessed from the touch screen LCD, Ethernet or RS 485 interfaces.
The DHPA 250U 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 four high performance 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 only “2RU” of cabinet space.
UHF High Power Amplifier 250W
DVB Products
mobile and terrestrial digital broadcasting
