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What is Button pairing and link encryption

Button pairing is how a transmitter and receiver recognize each other and create their own key. Link encryption means video, audio and keyboard/mouse data are then sent encrypted with that key, so unpaired devices cannot join.Also called: video link pairing, wireless video encryption

What pairing does

Several video links may run in the same space, and pairing makes each receiver accept only its own transmitter. During pairing the TX and RX create their own key, and from then on they find each other and connect at power-up. Production units ship already paired, so the product line only needs a power-on test, with no pairing step per unit.

Re-pairing in the field

Re-pairing is only needed after a transmitter or receiver is replaced. Hold KEY for 5 seconds to enter pairing; the LED flashes fast. On success the LED stays on, and the receiver overlays an OSD on its HDMI output showing pairing and key information, so the installer can confirm the link without a laptop. Holding KEY for 25 seconds or more resets the unit to blank and clears the pairing data.

What link encryption protects against

Anyone can receive a radio signal; encryption makes sure they cannot decode it. Video, audio and KVM data are encrypted end to end, and an unpaired device can neither join the link nor recover the picture. The same applies over cable or fiber. Buyers for meeting rooms, hospitals, finance desks and control rooms ask about this often.

On ANLYA modules

ATE9430T / ATE9430R and ATE9460 / ATE9461 use button pairing and ship pre-paired. On ATE9460 the pairing key is KEY0 (pin 12); on ATE9461 KEY is pin 3 and the LED pin 4. The 8K30 ATE9860 / ATE9861 in development also use button pairing and link encryption.

FAQ

Q1Can a wireless video link be intercepted?
The signal can be received but not decoded. TX and RX create their own key at pairing, video, audio and keyboard/mouse data are encrypted end to end, and unpaired devices cannot join. Cable and fiber links are encrypted the same way.
Q2Does each unit need pairing during production?
No. TX and RX ship as pre-paired sets and connect at power-up, so the line only runs a power-on test.
Q3How many receivers can one transmitter serve?
One TX can broadcast to several RX units. How many, and at what quality, depends on distance and interference at the site, so test with samples for your project.

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