This version of the Reference Monitor is the RM-4C8 with the RM-HDE1 expansion card already fitted. So, it has all of the features of the RM-4C8 as standard together with the ability to de-embed audio from an SDI stream and then decode a Dolby digital audio signal from that de-embedded audio.
The RM-HDE1 adds to the unit a 75ohm 3G/HD/SD-SDI input and output on BNC connectors with the output acting as a loop-through of the input. The monitor can take a 3G/HD/SD-SDI input and de-embed audio from any selected audio group, with left and right speakers being able to monitor any 2 channels within that group. The 4 channels in a group are shown on the 4 bar-graph meters. If a Dolby E or Dolby Digital input is detected on the selected input, the Channels (CHANS) button flashes to indicate that decoding is possible. Pressing the CHANS button displays the Dolby Digital 5.1 or Dolby E 8 channel signal, using the 4 bar-graph meters.