The TRR-30.5-20.7 from GeoSync Microwave is a Test Loop Translator with Downlink Frequency 20.2 to 21.2 GHz, Uplink Frequency 30.0 to 31.0 GHz, LO Frequency 9.8 GHz, Attenuation Adjustment Range 30 dB. Tags: Single Band. More details for TRR-30.5-20.7 can be seen below.