I found the soultion:
https://wiki.nitrado.net/en/enable_high_tick_rate_for_battlefield_4
Short term:
- Depending on the slots enabled for your server, tickrate will be different and at least the server must be an Advanced server.
- For servers up to 20 slots, tickrate can be maxed to 144Hz
- For servers up to 48 slots, tickrate can be maxed to 120Hz
- For servers up to 64 slots, tickrate can be maxed to 60Hz