Wifi disconnecting

I have a SURF SOHO MK5 router. It generally works fine, but the wifi will periodically drop all of the connections. For example, when my TV looses its connection, my phone also seems to loose its connection. I’m not sure if hardwired connections also get dropped. Is there some way to set up the logs to try and troubleshoot this? The router is connected to a separate cable modem and I’m assuming the problem is with the router, but I’m not sure if there’s something that would help me determine if it’s the router or the modem that’s causing the problem. My firmware is up to date.