You can do what you wish to do with a Freeview PCI TV card such as the Twinhan DVB-ter D+A. See:
It will record one programme whilst you are watching another providing the two channels are on the same MUX.
Samsung Galaxy A9 review: Hands-on
Can the Huawei P20 Pro really replace a digital SLR?
Surface Laptop 2 vs MacBook Pro
Samsung Galaxy S9 vs Sony Xperia XZ3