Humax NA-ACE User Manual - Page 21

A/V Output Setting Audio Output Set the audio mode which is output from the RCA/Cinch Jack. (Stereo/Mono) Screen Mode Select the aspect ratio of TV which is connected to STB (4:3 or 16:9). Display Format Select the format which the video is to be displayed on screen. When your TV set is 4:3 and video source is 16:9, STB will display in Letter-box or Centre mode as selected. When your TV set is 16:9 and video source is 4:3, STB will display in the Pillar-box or Full mode as selected. NTSC Mode Adjust this value between 3.58 and 4.43 if your TV displays the video only in black and white color. Normally NTSC 3.58 mode is used worldwide, but some TV sets can support only NTSC 4.43 mode. GB20