Enterprise AV systems use the network to send audio and video signal, so the setup of the network is crucial for the systems stability. Key Digitals IP products require different features (see figure 1), but both utilize multicasting technology to broadcast streams throughout the network. Both systems also require a network switch with IGMP (Internet Group Management Protocol) support in order to direct traffic of the broadcasted streams, ensuring that only the desired decoders receive the stream from the selected encoder.

Key Digital has worked with network switch manufactures to test their switches and create a model specific guide to ensure all settings on the switch are configured properly to create a stabile AV system. It is important when installing and programming an Enterprise AV over IP system that a verified network switch is used.

Figure 1:

EDID Chart

Setting up Enterprise AV systems is fairly simple thanks to the KD Wizard PC tool. The all in one Wizard will scan for any Key Digital device on the network, the tool can also scan for a USB device. When first setting up an Enterprise AV system it is best to use the USB scan to find each device and change its IP from default After all devices have been configured properly and placed on the network switch, then run a network scan.

After all devices are found by the tool during the network scan, the next step is to build your virtual matrix. In the Wizard creating a virtual matrix allows for the IP units to be configured properly. For the IP922 setup it is crucial to have the 4K box checked (see figure 2) while the IP1080’s have it unchecked.

After a virtual switch is created with its name, inputs and outputs, then the devices can be dragged over into the virtual switch. From there the switch file can be saved, and loaded into the master controller. For more info on setting up these units, check out the setup guide on the “downloads and specs” tab on each product page.

Figure 1:

EDID Chart

Key Digital video matrix, switchers, and distribution amplifiers do not scale resolution, so in other words if a source is 4K, then the switch will push out 4K to all its outputs. If one TV in this system is 1080P and the rest are 4K then the 1080P TV may have an issue with this resolution. A few ways to resolve the issue would be to see if the 1080P will accept the 4K signal and downscale, put in a scaler, or set all resolutions to 1080P. Audio is handled the same way that the units pass video resolution, if an input is set to 5.1 channel audio then it will pass that audio format to all outputs. This information is important to note when planning an installation!

There are some real problems encountered with the new high-bandwidth UHD/4K signals. These HDMI 2.0 features may look great, but are way over bandwidth of most products in the field:

  • Resolution: 4096x2160p
  • Frame Rate:  60Hz
  • Color Spacing:  [4:4:4]
  • Deep Color:  12bit
  • HDR:  10bit

Problem:  Customer will have no signal, even with just a long cable. 

  • Sources (bad):  Even BRP Menu is at 4K/60 [444], HDR10, 12bit Deep Color
  • Displays (bad):  Give full bandwidth EDID without any adjustments:
    • Samsung
    • JVC

Here is a current list of Key Digital Products with HDR as part of every handshake.  This, along with other EDID information, informs the source to output an acceptable signal:

  • KD-DA1x2, KD-DA1x4
  • KD-X222, KD-X222PO
  • KD-Pro4x1, KD-Pro2x1
  • KD-2x1CSK2.2, KD-4x1CSK2.2
  • KD-HDFix22
  • KD-Pro6x6CC, KD-Pro8x8CC


There are some GOOD sources and displays would not need HDR Buffering:

  • Displays (good):  Have adjustable settings
    • LG, Sony (both have deep color EDID off by defaults)
      Settings in TV menu:
      • LG:  UHD Deep Color EDID is set to OFF
        • Note:  LG currently having problem with HDBaseT
      • Sony:  Enhancement is set to OFF
  • Sources (good):  Have adjustable settings
    • Panasonic BRP
    • Xbox One
    • PS4 Pro

Key Digital HDBaseT extenders support 2 channels of possible IR flow:

  • From Tx unit (source) to Rx unit (display)
    • Uses a hard wired IR from a control system or IR connecting block (commonly reffered to as Serial IR)
    • Support two-wires:  IR Signal and Ground
  • From Rx unit (display) to Tx unit (source)
    • Commonly referred to as Reverse IR
    • Uses the included IR sensor, which is three-wires:  Power (for the IR sensor), IR Signal, and Ground
    • IR Sensor is only supported on the Rx unit for most products.  
    • Refer to the provided manual or access manuals online at www.KeyDigital.com for more information on your specific model and settings

Key Digital products provide the integrator the ability to choose from an expansive built-in handshake library, or to copy the handshake of a connected display/output.

EDID is set different on varying products, but we are glad to announce that our new model matrix switchers offer the ability to easily change the EDID going to each source via the included IR remote control. 

Typically, we recommend integrators use our handshake library.  With the IR remote it is simply: 

  • R2, R1, R3, Input Key, X,X

Use the 1-8 Input buttons to select the desired input device you’d like to send the handshake to. Use the numerical keypad at the bottom of the remote to choose the desired handshake from the below table

EDID Chart