The ES-243 is designed to accept any IRIG time code (in its "pulse width coded" form) or any ESE Time Code signal (TC76, TC89 or TC90) and output up to 24 identical copies. The unit has four separate and isolated channels, each with six available outputs. Inputs and outputs are accessible on rear-mounted BNC connectors. Each of the four channels has a loop-thru input that allows the input signal to be "looped" from one channel into the next, so that up to 24 identical copies can be created. Each ESE Time Code output is capable of driving up to 100 users at a distance of up to 4000 feet.