The Postium HLB-4K is a top - notch stand - alone image converter. It supports seamless up - conversion and down - conversion between 4K and HD, along with bidirectional HDR to SDR conversion. It also handles color gamut conversion between BT.2020 and BT.709. The 12G - SDI single link video input can be output in different configurations like 6G - SDI dual link or 3G - SDI quad link. It comes with GPI for loading presets from 1 - 8 upon junction detection and GPO with various selectable options such as Tally, Alarm, etc. using presets from 1 - 8. You can save/load up to 8 setting presets according to your usage. It allows easy back - up of setting data to a PC. Key features include color space conversion, input & output conversion, HDR/SDR conversion, and 3rd party TV and monitor calibration. Technical specs involve multiple input options like 4 x BNC for 12G SDI channels, 1 x HDMI 2.0, and 2 x SFP modules. Output options are similar with an option for 12G SDI channels. It also has LAN, USB, remote, and power connections. Weighing 1.4kg (3.08Ibs) and with dimensions of 210 x 44 x 197mm (8.26 x 1.73 x 7.75 inch).

Using the Postium HLB-4K is quite straightforward. First, connect your video source to the appropriate input. You can use the 4 BNC ports for 12G SDI channels, the HDMI 2.0 port, or the SFP modules. Then, choose your desired output configuration. If you need to convert between 4K and HD, or HDR and SDR, just set the presets. You can load presets from 1 - 8 using the GPI when a junction is detected. For GPO, you can select from different options like Tally or Alarm using the presets. To save or load settings, use the preset function according to your usage. You can also back up your settings to a PC. When it comes to maintenance, keep the device in a clean and dry place. Make sure the power supply is stable, using the XLR 4 PIN (12V) connection. If you're not using the device for a long time, disconnect it from the power source. Also, check the connections regularly to ensure they are secure.