Overview

The 718KVM Encoder — and its 3-in-1 rackmount version, the 749KVM — includes the following features when purchased:

• 4K video with HDCP 2.2 support
• Stereo audio support
• 3.5mm stereo analog audio output with adjustable delay
• KVM support for USB 2.0
• RS232, CEC, and IR control

The DSP-KIT is an optional, field-installable upgrade that adds advanced audio features:

• Dolby Digital 5.1 audio support
• Dolby DSP re-encoding (Dolby Digital 5.1 → stereo via Dolby Pro Logic II) for HDMI distribution to both multi-channel and stereo zones. See this article for details.
• 3.5mm stereo analog output with adjustable delay and volume
• Two analog audio inputs mixable with HDMI audio

718KVM vs. 718AVP

The easiest way to describe the 718KVM and 749KVM models is:

718KVM + DSP-KIT = 718AVP

749KVM + (3 × DSP-KIT) = 749AVP

Installing a DSP-KIT upgrades a 718KVM (or 749KVM) to full AVP-level functionality, adding Dolby Digital audio processing and advanced mixing capabilities.

Installing the DSP-KIT

Only a Phillips-head screwdriver is required for this installation. Follow the steps below:

1. Remove the four screws from the sides of the 718KVM case.

   

2. Remove the locking nuts from the 3.5mm Mic-In and Line-In ports on the front of the unit.

   

3. Locate the empty socket area on the circuit board where the DSP-KIT connects.

   

4. Align the DSP-KIT board with the pins and press down evenly from all four corners. Ensure all three sets of pins are aligned before applying pressure.

   

5. Reassemble the case, reinstall the screws, and replace the locking nuts.

Confirming DSP-KIT Installation

The 718KVM front panel includes a green Dolby Digital LED indicator. Its behavior changes depending on whether the DSP-KIT is installed:

• Without DSP-KIT: The LED blinks slowly and steadily, regardless of the audio format.
• With DSP-KIT installed:
  • LED is solid on when receiving Dolby Digital 5.1 audio.
  • LED is off when receiving stereo audio or no audio signal.