The LR-LT4610SER01 option adds GPS Sync Input, 10 MHz CW Sync Input and LTC Input/Output functions to the LR-LT4610. The time-code generator function is synced to Internal Time Information or GPS's Time Information, and available to generate ATC (LTC, LTC and AES/EBU Embedded Time-code) on the time information of GPS. This option is also equipped with a Holdover Function so that GPS signal and the CW signal phase and frequency will be held when there is a loss of signal.