# Wireless Genlock in ICVFX (In Camera Virtual Production)

**URL:** <https://forums.unrealengine.com/t/wireless-genlock-in-icvfx-in-camera-virtual-production/753411>\
**Category:** Virtual Production\
**Tags:** hardware, unreal-engine, question\
**Created:** [January 20, 2023, 8:07am UTC](https://forums.unrealengine.com/t/wireless-genlock-in-icvfx-in-camera-virtual-production/753411 "2023-01-20T08:07:38Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![nthJim](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@nthJim](https://forums.unrealengine.com/u/nthJim)\
**Post date:** [January 20, 2023, 8:07am UTC](https://forums.unrealengine.com/t/wireless-genlock-in-icvfx-in-camera-virtual-production/753411/1 "2023-01-20T08:07:38Z")

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Hello! I’ve been tasked with helping my company to build out a virtual production studio. So far a lot of the hardware pieces are falling into place nicely. The only thing I am struggling to grasp is wireless genlock. A lot of professionals say it’s not possible, yet I know it is from the Unreal Documentation here:

> **[In-Camera VFX Recommended Hardware](https://docs.unrealengine.com/5.1/en-US/recommended-hardware-for-in-camera-vfx-in-unreal-engine/#additionalrecommendedhardware)**
>
> Details on the hardware recommendations for an in-camera VFX setup with Unreal Engine

Under “Sync Generators” it describes using an Ambient Lockit device to wirelessly connect to a Master Signal Pulse Generator, such as one by Aja or Evertz…

So here’s my question: How do they get the Master Signal Pulse Generator and the Lockit Sync device on camera to talk to eachother? As far as I can tell, the Lockit needs to see a channel frequency, but none of these Master Generators output any kind of signal like that. Am I missing something?

Thank you very much to the knowledgeable people here.

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**Author:** ![Data\_Vision](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/data_vision/32/1118730_2.png) [@Data\_Vision](https://forums.unrealengine.com/u/Data_Vision)\
**Post date:** [February 27, 2023, 1:25pm UTC](https://forums.unrealengine.com/t/wireless-genlock-in-icvfx-in-camera-virtual-production/753411/2 "2023-02-27T13:25:48Z")

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You just need a pair of lokits, one acting as Tx and one as Rx. Check their documentation

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**Author:** ![nthJim](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@nthJim](https://forums.unrealengine.com/u/nthJim)\
**Post date:** [March 31, 2023, 6:16pm UTC](https://forums.unrealengine.com/t/wireless-genlock-in-icvfx-in-camera-virtual-production/753411/3 "2023-03-31T18:16:13Z")

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Thank hoejeon, that’s not really what I meant, but thank you for the reply.

I’ve discovered the answer for a mixed wireless/wired system is to used a Composite Digital Amplifier to split the signal out from a Lockit to many wired ports while maintaining the ability for other Lockits to talk directly to the Master lockit.

Another option instead of a Digital Amplifier is to use the master lockit as the input signal into something like an Evertz Master SPG, so the Evertz re-echoes the Genlock signal. This method has the advantage of allowing Phase shift in the sync incase of micro desync between wired and wireless.

I hope this is helpful for others in the future 🙂

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**Author:** ![Data\_Vision](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/data_vision/32/1118730_2.png) [@Data\_Vision](https://forums.unrealengine.com/u/Data_Vision)\
**Post date:** [August 3, 2023, 9:52am UTC](https://forums.unrealengine.com/t/wireless-genlock-in-icvfx-in-camera-virtual-production/753411/4 "2023-08-03T09:52:47Z")

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Glad it worked out,  
I replied in a hurry but you are right, in my studio we use a lockit that feeds a genlock distribution amp via BNC, and is set to master ACN and then as many ACN slaves unit as you need .