... the following outputs into 7 cards, they are Dry output, TTL output, 485/422 output, serial output, IRIG-B AC output ... (PPS/PPM/PPHH/PPH):Dry output,TTL output,422/485 outputIRIG-B output:DC output (TTL output and 422/485 output),AC ... , TXD1 and IRIG-B DC signalsTTL Output Card:Max. 12 TTL outputs, the output can be Pulse output or IRIG-B ...