I am looking for help with specifications of a directional coupler that is identified as follows: Meca KS-21603L 3 Coupler 700-M031 It has ports with -50 dB and -40 dB markings. The most useful thing to know would be the Frequency range, and then some idea of the accuracy at 1296 and 2.3 GHz. 73 Rex VK7MO