How to reliably record "sub-channels" of sports programs

Summer is the season when sports broadcasts increase. Especially this year, there were a lot of good cards from Tokyo 2020, and it was an event that even fans can't miss. If you record it, you will be able to "relive that excitement", so I think many people have introduced a video recorder in a hurry. At that time, I want to keep in mind "channel switching". In Japanese digital TV broadcasting (terrestrial digital / BS), one broadcasting station / channel can be divided into main and sub and broadcast simultaneously (multi-channel), but when watching live broadcasting, switching from main to sub is not automatically processed. .. When the game broadcast is relayed from the main channel to the sub channel, it is a principle to switch manually by pressing the channel button on the remote control.

I also want to reserve a subchannel, what should I do? In the case of a video recorder, if the product supports a function called "event relay", it will automatically follow when the program reserved for recording switches from main to sub. However, there are some differences in functions, such as automatic tracking is not possible when the TV station itself is switched because it is only multi-channel, and it does not work at the time of daily / weekly reservation. If you don't want to leave it to the machine because it is a match that you can never miss, or if you want to make sure to make a recording reservation, specify a subchannel at the time of reservation. If you turn on the multi-channel display in the electronic program guide (EPG) settings, the time zone that is divided into main and sub broadcasts will be displayed in two parts, so you can make a recording reservation for each. If you can make a reservation with the EPG, it is recommended that you use the event relay function for programs where the channel switching is decided at the last minute, such as an extended game of baseball.