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Model UPC-590 Heterodyne Up-Converter ~ 5 to 85 MHz RF Input, 205 to 285 MHz IF Output

Application: The UPC-590 Dual Up-Converter is designed for use with the Callisto instrument and the Long Wavelength Array (LWA) antenna, but it may be used with other receiver and antenna systems. Callisto and UPC-590 ordering information is available here and LWA antenna ordering information is available here. The UPC-590 is a dual unit with two identical up-converters, one for each polarization of the LWA Antenna.

Operation: The RF inputs from the LWA Power Coupler are first applied to a 5 to 85 MHz bandpass filter, one for each antenna polarity. A local oscillator (LO), tuned to 200 MHz, is mixed with the filtered RF input to provide an IF output range of 205 to 285 MHz. The mixer output is attenuated by 15 dB and filtered to provide a net loss from RF input to IF output of approximately 22 dB. The UPC-590 IF Output usually is fed through an RF power splitter to spectrometers and receivers. The splitter introduces additional loss and lowers the IF output level to be compatible with the Callisto instrument RF input. The UPC-590 also can be supplied with a 20 dB attenuator on its output if a downstream RF power splitter is not used. Alternatively, an external attenuator may be used to adjust the level.

Specifications (all values are nominal):

  • RF input frequency range: 5 to 85 MHz

  • RF input connectors: Type N-female

  • IF output frequency range: 205 to 285 MHz

  • IF output connectors: Type N-female

  • Input voltage: 12 Vdc

  • Input current: 100 mA maximum

  • Input power connector: 2.1x5.5 mm coaxial jack (center positive +)

  • Gain: -22 dB

  • Dimensions: 168 mm long x 110 mm wide x 79 mm high

  • Weight: 3.8 kg

Documentation: UPC-590 Up-Converter Installation and Setup Instructions

UPC-590 System Block Diagram:

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Images: (Note: images show a prototype with a 300 MHz LO; all production UPC-590 are supplied with a 200 MHz LO)