Within each converter is an amplifier that has sufficient gain to set the overall noise temperature of the receiver. After this first conversion the IF paths are identical. The 4-40 GHz IF is split at 22 GHz by a diplexer. The upper half is shifted down to 4-22 GHz with a single block conversion using high side injection at 44 GHz. Gain is provided along the way as needed.
All components are on hand and have been characterized.
Mounting bracket is finished and RF converters are now being installed. The square law detectors that provide a measure of the power in each channel follow the filters. All components are on hand and are being tested. The low loss, high frequency cable, which interconnects the RF and IF section, is ready for installation. The rack mounted box are being assemble, one for each IF module.