Question about gps module and livox hub

[TaekHyungCho]

Hi, I want to change my livox hub time stamp to Type3(UTC), So i tried to connect livox hub and gps module. But it's my first time to handle gps module, so i don't have any idea about gps module... I already read livox hub manual, and I saw picture which explain about gps module and hub connection.

That picture really helpful to me, but i have a one question. It seems that 2 connections (time signal & pps signal) to TTL to RS485 are necessary... Did I ubderstand right?? Or just one connection (e.g PPS singal) is okay to time sync for livox hub? (Since it's my first time to handle gps module... so it's hard to me choose what gps module to buy and undestanding about gps module time signal) I know it is very simple question, but can you tell me about more information??

[Livox-SDK]

Hi TaekHyungCho，

That's a good question, if the output of GPS module is TTL signal, yes, two signal converters are required.