The BLT-9800-Ka from Atlantic Microwave is a Test Loop Translator with Downlink Frequency 17.7 to 21.2 GHz, Uplink Frequency 27.5 to 31 GHz, LO Frequency 9.8 GHz, Attenuation Adjustment Range 30 dB. Tags: Single Band. More details for BLT-9800-Ka can be seen below.