Poor-quality or incorrectly terminated Cat cabling is the most common cause of HDBaseT signal problems on neo matrix installations. This article covers cable selection, correct termination to the 568B standard, and how to use the matrix's built-in link quality tools to verify each run.

Choosing the Right Cable

Neo matrices use the HDBaseT standard over standard Category cable. The minimum requirement is Cat 5e, but Cat 6 or Cat 6A is strongly recommended — particularly for 4K signals or runs approaching the maximum rated distance. Higher-category cables have tighter twist rates and stricter shielding tolerances, both of which directly reduce crosstalk and data loss between pairs.

Cable category at a glance

Solid core, not stranded

Always use solid core cable. Stranded cable (typically used for short patch leads) has significantly higher attenuation over distance and is not appropriate for in-wall HDBaseT runs. Pre-made patch leads are not recommended unless you can confirm they are solid core and terminated to the 568B standard.

Shielded vs Unshielded Cable

Both UTP (unshielded) and STP/FTP (shielded) cable can work well on neo installations, but each requires different connector and grounding practice. Choosing incorrectly — particularly with shielded cable — can introduce more interference than it eliminates.

Unshielded (UTP) — Cat 5e, Cat 6, Cat 6A

Use plastic (non-metallic) RJ45 connector bodies. Metal-bodied connectors on UTP cable can create unintended grounding paths into the matrix hardware, causing interference or link instability. This is the simpler and more forgiving option for most installations.

Shielded (STP / FTP / S/FTP) — Cat 6A, Cat 7

Shielded cable only provides benefit when the shield is correctly grounded at both ends. Use metal-bodied RJ45 connectors and ensure the cable's foil shield and drain wire make firm contact with the connector shell. An incorrectly grounded shielded cable will act as an antenna and worsen interference rather than reduce it. If you are not confident in correctly terminating shielded cable, UTP Cat 6A is a better choice for most installs.

Routing and Physical Handling

The electrical properties of a Cat cable can be significantly degraded before termination even begins. Keep the following in mind during installation:

• No kinks or sharp bends. Kinking a cable crushes the twisted pairs and changes their impedance. A kinked cable may pass a basic continuity test but will show poor MSE readings on the link quality test. The minimum bend radius for Cat 6A is typically 4× the cable diameter — follow the manufacturer's specification.
• Do not over-tighten cable ties. Compressing the cable jacket deforms the pairs inside. Finger-tight is sufficient; use Velcro ties rather than nylon zip ties where possible.
• Keep away from mains cable. Running HDBaseT cable parallel to mains power — particularly unshielded — will introduce interference. Cross mains cable at 90° where unavoidable, and maintain separation of at least 50mm when running parallel.
• No cable joins or couplers mid-run. Each HDBaseT output requires a single, unbroken cable from the matrix to the receiver. Mid-run couplers increase resistance and introduce reflection points; they will reduce effective range and may cause intermittent link failures.
• Use a long single cable, not a patched run. The best practice is a direct cable from the matrix HDBaseT output port to the receiver. If patch panels or wall plates are used, ensure all termination points are correctly punched down to 568B — each additional connection is a potential failure point.

Terminating to 568B

All neo HDBaseT cabling should be terminated to the TIA-568B wiring standard at both ends. This is a straight-through cable — both ends are wired identically. Never use 568A at one end and 568B at the other (crossover configuration), and avoid wiring both ends to 568A.

568B pin order

Looking into the RJ45 plug with the tab facing down and pin 1 on the left, the wire order is:

Termination steps

Wall Plates and Patch Panels

If your installation uses wall plates or patch panels, each termination point must be punched down to 568B. Mixed wiring standards between the matrix end and the wall plate end will cause a link failure or severe signal degradation even if the continuity test passes.

Each keystone jack or patch panel port adds a small amount of resistance and a reflection point. A properly terminated run through a wall plate and patch panel will have minimal distance impact, but a poorly punched-down point can reduce effective range significantly. Verify every intermediate termination point if a run is showing poor link quality.

Testing Cable Quality with the neo Matrix

Once the cable is run and terminated, use the matrix's built-in HDBaseT Link Quality Test to verify each output port. This test goes beyond basic continuity and checks the actual signal integrity of the live HDBaseT link — it is the definitive pass/fail tool for HDBaseT cabling on neo systems.

Access the test via the matrix web interface: go to Admin → System Health → HDBaseT Link Quality Test. Select the output port you want to test, then choose the test type.

Mean Square Error (MSE) test

MSE measures the ratio of received signal power compared to the originally transmitted signal, expressed in dB. It is an analogue measurement directly affected by physical cable faults — kinks, poor termination, excessive untwisting, and interference from adjacent cables. Each of the four twisted pairs in the cable is represented by a separate coloured channel on the graph, matching the pair colours in the cable itself.

Pass criteria:

• All four channels must remain below the −15 dB line (lower values are better).
• All four channels must be within 3 dB of each other — for example, readings of −21, −20, −21, and −19 dB would pass; readings of −21, −21, −21, and −14 dB would fail.

If any channel exceeds −15 dB or the spread between channels exceeds 3 dB, the matrix will report the cable quality as Poor. An imbalanced spread between channels typically points to a specific pair — check the termination of the pair corresponding to the outlying channel colour.

Channel Errors test

Channel Errors measures the number of digital errors — packet loss and bit errors — on each of the four pairs. This is a digital measurement and will reveal intermittent faults that the MSE test may not capture in real time.

Pass criteria:

• All four channels must remain below 40.
• All four channels must be within 3 of each other — for example, readings of 35, 36, 35, and 34 would pass.

Reading the results per pair

Each coloured channel in both tests corresponds to a twisted pair in the cable, using the same colour coding as the cable itself. If one channel is significantly worse than the others, start your inspection at the termination of that specific pair — both at the matrix end and at the receiver end. Common causes of a single outlying pair are: a nicked conductor, excessive untwisting at the crimp, or a misplaced wire in the 568B order (swapped pins within a pair, or a split pair between two wrong pins).

Checking link quality remotely

If your installation is registered on the Pulse-Eight monitoring portal at monitoring.pulse-eight.com, you can review HDBaseT link quality data for all output ports without being on site. This is useful for investigating intermittent faults that are not reproducible during a visit, as the portal logs historical link status data.

Common Faults and What They Indicate

Quick Reference: Cabling Rules

• Minimum Cat 5e; Cat 6A recommended, especially for 4K
• Solid core copper only — no CCA, no stranded patch cable
• 568B at both ends and at every intermediate termination point
• UTP cable: plastic connector bodies only
• STP/FTP cable: metal connector bodies; foil and drain wire must contact the shell
• Single unbroken run per port — no mid-run couplers or joins
• Untwist pairs no more than 13mm at each termination
• Minimum bend radius: follow cable manufacturer specification; never kink
• Keep at least 50mm separation from mains cable when running parallel; cross at 90°
• Test with the matrix HDBaseT Link Quality Test after installation — not just a continuity tester

Related Articles

• neo Matrix — HDBaseT Link Quality: Diagnosing and Resolving Poor Readings
• neo Matrix — Transmitter, Receiver and HDBaseT Range Guide
• Neo Matrix — Getting Started