Terminate a coax training cable and inspect it

What you should be able to do

Prepare, terminate and inspect a disconnected coax training sample using a supported compression F-connector system, then record the limits of the electrical checks performed.

Trainer Selection

Use a known RG6/6Q sample that meets the connector's compatibility requirements, the appropriate Klein Universal F connector and a manufacturer-supported compression tool. The VDV002-818 kit is a documented example containing VDV812-606 connectors, a VDV110-061 stripper, a VDV212-008 compression tool and a Coax Explorer 2. Its tester checks continuity and identifies good/open/short conditions. [1] This example does not approve every cable bearing an RG6 label. Apply Lesson 230's exact-part and dimensional checks before the instructor selects the actual sample.

Isolate The Sample

Use a bench cable disconnected at both ends from equipment, splitters, terminators, antennas, power inserters and all other systems. Coax may carry DC power or RF energy; an unknown installed cable is not a practice sample. The instructor establishes the disconnected boundary and required precautions. Wear eye protection, keep fingers out of cutters and collect small braid and conductor fragments. Do not place a connector in powered equipment to find out whether the termination is correct.

Follow The Preparation Drawing

Klein's connector instructions use a stepped strip, fold the wire shield over the jacket, specify insertion until the center conductor projects approximately 1/8 inch (3 mm) beyond the connector, and then compress the assembly. [2] Use Figure 1 of the actual instructions for the individual stripping dimensions. The final projection is not a jacket-strip length. Do not copy an unrelated BNC or compression connector's preparation. Follow the cable-specific treatment for foil and multiple shields; this lesson does not authorize removing every shield layer.

Supervised Practice

1. Record cable, connector and tool parts, instruction revision and sample ID.
2. Set the stripper according to the specified preparation. Make a practice cut on permitted scrap first if the instructor requires it.
3. Inspect the prepared end. Look for a nicked or bent center conductor, damaged dielectric, incorrect dimensions and loose conductive strands.
4. Prepare the shield exactly as the selected instructions require. Keep it clear of the center conductor.
5. Insert the cable fully and verify the specified seating/projection before compression. If it will not seat, check compatibility and preparation rather than forcing it.
6. Place the assembly squarely in the supported tool and complete its instructed compression cycle. Keep hands clear.
7. Inspect the body, center conductor, dielectric position, visible shield strands and cable retention. Use the manufacturer's retention check; do not invent a destructive pull force.
8. Repeat the approved process for the other end and proceed to the specified tests.

The overview supports the original connector instructions. It does not replace them or establish a universal coax termination sequence.

Read The Defect Drawing

The curved red strand represents a piece of shield braid contacting the center conductor. That creates an unintended conductive connection. The drawing is deliberately simplified and not to scale; it does not depict the correct treatment of all foil or braid layers. A short indication is a reason to investigate, not proof that this exact defect exists. Other contact faults or cable damage can produce a similar result.

Basic Electrical Checks

For the bare cable assembly shown, with no attached components, the intended paths are center-to-center and outer-shell-to-outer-shell. An unintended center-to-shell connection is a defect. Use the approved coax tester and its required remote according to its instructions. If the exercise uses separate resistance measurements, the instructor specifies the instrument, disconnection method and acceptance limits. Test remotes, loads or connected devices can intentionally alter readings; do not interpret a loaded assembly as the bare-cable example. A continuity pass does not measure all insertion loss, return loss, impedance or application performance. Record a continuity result as continuity, not as full RF certification.

Worked through

Sample CX-231 initially reports a short. Inspection finds a loose braid strand at one end. Document the finding, obtain the approved correction or replace the affected termination, and retest. Inspect the other end too; finding one defect does not prove no others exist. Retain the initial result and repair note. Do not discard the failure simply to make the practice record look clean.

Worked through

The center and shell paths appear continuous, but the cable is not retained under the prescribed inspection. Do not accept the assembly. Investigate connector compatibility, seating and tool setting. A limited electrical pass cannot compensate for failed mechanical retention.

Assessment Record

Sample ID and length: Cable / connector / tool: Preparation drawing revision: Visual inspection: Tester / remote / setup: Initial outcome: Confirmed defect or unresolved cause: Correction: Retest outcome: Instructor practical assessment:

Quick Check

Where beginners go wrong

Check Yourself - Explained Reasoning

Sources