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Those with analog passthrough allow both digital and analog television to be viewed on older TVs.īefore digital television, passthrough originally existed in VCRs (and later PVRs and DVDRs) that connected to TV set using RF connector, allowing the TV antenna or cable TV signal to be switched to pass through the VCR, or have VCR output added as an extra channel.Īll digital-to-analog converter boxes have both an antenna input (which accepts the coaxial cable that formerly went directly to the TV) and an RF output (which now goes directly to the TV). Boxes without analog passthrough only allow digital TV ( ATSC standard) to be viewed on older, analog-only ( NTSC standard) TVs. ( Learn how and when to remove this template message)Īnalog passthrough is a feature found on some digital-to-analog television converter boxes.

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