The BLT-10300-Ka from Atlantic Microwave is a Test Loop Translator with Downlink Frequency 17.7 to 21.2 GHz, Uplink Frequency 28 to 31.5 GHz, LO Frequency 10.30 GHz, Attenuation Adjustment Range 30 dB. Tags: Single Band. More details for BLT-10300-Ka can be seen below.