2005-20P4 Downconverter, 2.0-2.5 GHz to 70/140 MHz

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 PLL alarm occurs (red). The mixer output is applied to the output attenuator providing a nominal gain of +5 dB (high gain) or -15 dB (low gain). Connectors are 50Ω BNC (female) for the IF input and for the RF output (other connector options are available). Powered by a 120VAC wall power supply (100-240 ±10%VAC, option -P4). The 2005 can be mounted on a 1 3/4” X 19" rack mount panel (option -R).