The TLS-17.7 from GeoSync Microwave is a Test Loop Translator with Downlink Frequency 0.95 to 1.75 GHz, Uplink Frequency 17.3 to 18.1 GHz, LO Frequency 16.35 GHz, Attenuation Adjustment Range 30 dB. Tags: Single Band. More details for TLS-17.7 can be seen below.