Maximum cable lengths for Group Telepresence systems
Installing Cable informationLast updated April 11, 2017
For HDMI interfaces and DVI interfaces when used with a digital source, the cable assembly (including any line couplers used) must comply with the requirements of a Category 2 cable as defined in the HDMI specification Version 1.3a. This includes meeting the following maximum signal attenuation specifications:
Signal frequency maximum attenuation
825 MHz 5 dB
2,475 MHz 12 dB
4,125 MHz 20 dB
5,100 MHz 25 dB
The maximum length of cable for which these specifications are met depends on the quality of the cable. However, it is unlikely that any cable achieves these specifications at a length greater than 15 meters unless active HDMI/DVI extenders are used. For a given cable quality, the use of passive line couplers reduces the maximum length up to which these requirements are met.
HDMI interfaces are production tested using a 10 meter long cable from the following source: Lindy 10m premium cable
DVI interfaces are production tested using an instance of the 5 meter DVI-I cable supplied with the product.
StarLeaf supplies standard length microphone cables. However, any good XLR cable works well. Testing at StarLeaf shows good results with up to 100m of high quality cable.
USB Extenders for Logitech C920 camera
Where a USB camera is used, the camera cable is 1.75m. Do not use any additional cable extenders.
USB Extenders for Logitech C922 camera
Where a USB camera is used, the camera cable is 1.8m. Do not use any additional cable extenders.