User manual

4
About Monitor Compatibility
The HDP4 is designed to work with most DVI-D monitors. The HDP4 uses the
industry standard EDID communication protocol (within the DVI link) to
communicate with the monitor, and then adjust the DIP’s internal scaling engine to
scale the input video to the native resolution of the monitor. However, due to the
hundreds of variations of DVI formats currently in use, proper operation with all
monitors cannot be guaranteed.
The HDP4 has 2 modes of operation that occur automatically, depending on what
monitor it is attached to: Recommended Monitor Mode and VESA Mode.
Recommended Monitor mode
For recommended monitors, there is custom firmware that will provide an accurate
frame-locked image for all supported SDI and HD-SDI input formats. The HDP4
automatically determines the monitor it is connected to.
Recommended Monitors:
• Apple 23" HD Cinema, model M9178LL/A (aluminum bezel)
• Sony 23", model SDM-P234
• Viewsonic VP231wb
VESA Mode
For DVI-D monitors not on the recommended list, the HDP4 will use standard VESA
timing based on the particular monitors “preferred timing”—as determined by the
EDID communication with the monitor. Because VESA timing standards are not
based on video formats, the HDP4 cannot frame lock to the input video and will
operate like a frame synchronizer - it will frame rate convert by adding or dropping
frames as needed. If a particular monitor reports a preferred timing mode that is not
supported by the HDP4, the HDP4 will default to standard XGA (1024 x 768 60Hz)
timing.
Monitors tested for Compatibility in VESA Mode:
• HP HPL2335
• Samsung 170T
• Samsung 213T
• Samsung 243T
• Samsung 173P