The 2005-20 Downconverter converts a 2000 to 2500 MHz signal to 70 MHz or 140 MHz IF in 1 MHz steps with selection of high side LO (C = inverted) or low side LO (Ku = non-inverted) and 70 or 140 MHz output over the 2.0 - 2.5 GHz range for loop-back applications.
Featuring low phase noise, these units are used to loop 2.0 - 2.5 GHz receivers to 70 or 140 MHz modulators for test purposes. The input frequency is selected with four BCD switches which control the synthesized local oscillator (LO) signal. The 2.0 - 2.5 GHz input is mixed with this synthesized LO to the 70 or 140 MHz IF signal. Front panel LEDs light when DC power is applied (green) and when a
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