Quantum Data 780 Quick Start Manual page 85

780 Handheld Test Instrument
8 Using the 780 Test Instrument to Test HDMI Cable or Repeaters
This section provides procedures for testing HDMI cables, cable extenders, splitters, repeaters, etc. The HDMI/DVI Cable
Test runs a pixel error test on the TMDS leads and a continuity check on the 5V & hot plug leads and the DDC leads. The
Repeater test runs a pixel error test on the TMDS leads and a continuity check on the 5V & hot plug leads and the DDC
leads but additionally tests the hot plug delay and the hot plug width.
The cable test and repeater test can be used when the source and sink ends are collocated, in other words can be
connected to the 780 Tx and Rx ports. For a cable or distribution system that is installed and where the source and sink
ends cannot be connected to the 780, you can use the Frame Compare feature. The Frame Compare feature captures a
reference frame and then compares a series of captured frames pixel by pixel to the reference frame.
The features and functions described in this section are included only if you have purchased the HDMI Cable
and Link Test option.
8.1 HDMI Cable or Repeater Test
The HDMI/DVI Cable Test runs a test on all the leads in the HDMI cable and HDMI links (when extenders, splitters,
switchers and repeaters are used) except the power and CEC bus as follows:
Pixel error test using a pseudo-noise pattern on the TMDS lines using three separate timings:

720p60 using 8 bit/component color
o
1080p60 using 8 bit/component color
o
1080p60 using 12 bit/component (deep color)
o
Read/write test on the DDC leads. It reads an EDID at the output from the input.

Continuity test on the 5V/Hot plug leads.

 Hot plug delay and hot plug pulse width. The hot plug delay is the time that elapses between the falling edge of the
hot plug line on the on the sink side of a repeater and the falling edge of the hot plug line on the source side. The
hot plug pulse width is the time that the hot plug pulse goes low as detected on the HDMI Tx side.
8.1.1 Configurations for Running an HDMI Cable or Repeater Test
This subsection provides configurations supported when performing an HDMI cable test or a test of an HDMI network
comprised of repeaters, splitters, extenders, switches, etc.
Quick Start Guide
Page 84
Revision A19