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What is HDMI loop-out

HDMI loop-out means the transmitter passes its HDMI input straight out to a local monitor while sending the same picture over the link. The term only applies to the transmitter side.Also called: HDMI loop-through, local HDMI out

What HDMI loop-out is

A transmitter box usually sits next to the source: a lectern PC, a production desk or a camera. The loop-out port passes the input signal out without encoding, so a monitor beside the box shows the local picture while the far end shows the wireless one. Without loop-out, local viewing needs an HDMI splitter between the source and the transmitter.

Built into the module or added on the carrier

In one approach the module already has loop-out, and the carrier only routes the loop-out signals from the edge connector to a second HDMI connector. In the other, the module has none, and an HDMI splitter chip sits between the carrier's HDMI input and the module: one branch to the module, one to the loop-out connector. The first keeps the carrier simple; the second adds a chip and its routing, and that chip sets the loop-out spec.

Why receivers have no loop-out

A receiver already decodes and drives the display over HDMI, so loop-out does not apply to it. To feed several screens from the receiving side, either add a splitter chip after the RX carrier's HDMI output, or use one-TX-to-many-RX broadcast with one receiver per screen.

On ANLYA modules

The 4K30 ATE9430T has loop-out built into the module, up to 4K30; the carrier only needs one more HDMI connector and no splitter. The 4K60 ATE9460 has no loop-out on the module itself; add an HDMI splitter chip on the carrier for 4K60 loop-out. The receivers ATE9430R and ATE9461 output HDMI directly, so loop-out is listed as not applicable.

FAQ

Q1Can a 4K60 wireless video transmitter module do HDMI loop-out?
Yes. The ATE9460 module has none of its own, but an HDMI splitter chip between the carrier's HDMI input and the module gives 4K60 loop-out.
Q2Which wireless video modules have built-in HDMI loop-out?
ATE9430T has loop-out on the module, up to 4K30. The carrier routes the loop-out signals to a second HDMI connector for the monitor. The loop-out pinout comes with the carrier reference design.
Q3Does a wireless HDMI receiver have loop-out?
The term does not apply. The receiver decodes and outputs HDMI directly. For several screens, add a splitter chip after the RX output, or broadcast from one TX to several RX units.

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