The TRR-6.25-3.8 from GeoSync Microwave is a Test Loop Translator with Downlink Frequency 3.4 to 4.2 GHz, Uplink Frequency 5.85 to 6.65 GHz, LO Frequency 2.45 GHz, Attenuation Adjustment Range 30 dB. Tags: Single Band. More details for TRR-6.25-3.8 can be seen below.