The 840Hxl can also be used as an invaluable advanced HDMI troubleshooting device. The user can easily select the pattern, the resolution, the colour depth, and the colour space of the output HDMI signal, either through the front panel buttons or the included computer software. The audio capabilities allow users to change the unit’s sampling frequency (44kHz, 48kHz, 88kHz, 96kHz, 176kHz and 192kHz) and bit depth (16 bit, 20 bit and 24 bit).

Through its “Output Native Resolution” setting, the 840Hxl can read the detailed mode line of the native resolution of the display’s EDID (Extended Display Identification Data). It then sets its output to send the optimum resolution to the connected display. In this way, the 840Hxl operates more like a computer graphics card that adapts to whatever is connected to it.

The 840Hxl has the ability to toggle HDCP on and off, which allows the user to individually isolate the HDCP signal and determine whether HDCP is the reason that a source is not working.

The unit is housed in a compact Kramer MultiTOOLS enclosure. It has an HDMI output, five dual-function control buttons, and two single-function buttons. It includes a USB port, as well as RS−232 port, for connecting to a controlling PC (PC control software is included). The unit has a two-digit display, power LED, and an onboard EPROM option that saves the last unit settings.