Kindermann MultiSwitch 21 HDBT Mounting Instructions page 35

8.2.2 Auto downscale
Enable or disable downscaling on the HDMI output on transmitter and/or
receiver. If activated the resultion will always be downscaled to 1080p.
8.2.3 HDCP
Here you can decide which device shall define the HDCP version. If your
display can only support HDCP 1.4, we recommend to set it to display.
EN 35