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newSchoolWorks.com › VoTechWorks › Technology & Design › Electronics / Telecom Technician › Externship / Worksite Placement › Lesson 2
TEC-ELEC48-08 · Lesson 2 · 180 clock hours · field

Supervised Trade Tasks: Cabling, Fiber, Electronics, and RF Work

Objective. Working under direct mentor supervision, the student performs entry-level electronics or telecom technician tasks—drawn from at least three of the following areas: copper cabling termination and testing, fiber-optic splicing or polishing, PCB-level inspection or rework, structured cabling installation, or RF equipment staging—meeting the employer's acceptance criteria on each completed task.

⚠ Pending professional review

This lesson, its worked examples and its practice questions has not yet been verified by an industry-certified professional or by a certification or approval body. It is a study draft and may contain errors. Do not use it as instructions for work on a job site or on live equipment. Always follow your instructor, your supervising professional, and current official references and regulations.

VoTechWorks program approval and accreditation are still in progress. Credentials are issued only by the certifying bodies named in each program, after their own exams.

Supervised Trade Tasks: Cabling, Fiber, Electronics, and RF Work

Your externship placement is where classroom knowledge becomes professional skill. Under direct mentor supervision, you will perform real production or service tasks in at least three of the following areas: copper cabling termination and testing, fiber-optic splicing or polishing, PCB-level inspection or rework, structured cabling installation, and RF equipment staging. Each task you complete must meet your employer's acceptance criteria, and every result gets recorded in your daily worksite log.

Safety First: Every Day, Every Task

Before you touch any equipment, confirm that all required safety practices are in place.

Copper Cabling Termination and Testing

Cat 6 and Cat 6A structured cabling must be terminated to TIA-568 pin-out standards (T568A or T568B, consistently applied per the project specification). After termination, use a cable certifier to run the full suite of tests: wiremap, length, insertion loss, near-end crosstalk (NEXT), and return loss. The certifier compares your results against the channel or permanent-link performance limits for the category. A PASS result means every parameter met the standard; a FAIL requires you to locate the fault—usually an incorrect termination, a tight bend, or a crushed cable—and re-terminate.

Record the certifier model, cable ID, test limit standard selected, and the pass/fail outcome in your daily log.

Fiber-Optic Splicing, Polishing, and Connector Inspection

Fiber connectors must be clean before every measurement. Use a fiber inspection scope (video probe or handheld scope) to examine the end face for contamination, scratches, or chips before mating any connector. Clean with an approved fiber optic cleaning tool; inspect again before connecting. A dirty connector degrades insertion loss and can permanently damage the mating adapter.

Fusion splicing joins two fiber ends by arc-welding them together with a fusion splicer. The splicer estimates splice loss after the arc cycle; typical single-mode splice loss targets are very low (fractions of a dB). Mechanical polishing of field-installed connectors requires following the connector manufacturer's specified polishing film sequence.

An OTDR (optical time-domain reflectometer) sends a pulse of light down the fiber and measures reflections over distance, revealing splice loss, connector loss, bends, and end-of-fiber. Learn to read an OTDR trace with your mentor before interpreting results independently.

PCB-Level Inspection and Rework

IPC-J-STD-001 is the industry standard for solder quality on electronic assemblies. It defines three classes of products (Class 1, 2, and 3 in increasing reliability requirements) and describes acceptable and defective conditions for each solder joint type. On the rework bench, you will inspect joints visually—and sometimes with magnification—for cold joints, bridges, insufficient fill, or lifted pads. Rework (reflowing or replacing a joint) must restore the joint to an acceptable condition without damaging the board or adjacent components.

Always use the correct tip temperature and solder type for the board. Lead-free assemblies require higher reflow temperatures than tin-lead assemblies and must not be mixed without authorization.

RF Equipment Staging

RF staging tasks may include mounting and aligning antennas, connecting coaxial cable runs with the correct connector type (N-type, BNC, SMA, etc.), and verifying that all connections are tight and weatherproofed. Coax must be stripped to the manufacturer's specified dimensions before crimping or compression-fitting a connector. A poorly seated center pin or a shield braid that contacts the center conductor creates a short or an impedance mismatch that degrades signal.

Using Your Daily Worksite Log

Your log is a professional document. For every task, record the date, task description, tools and instruments used (including model numbers when possible), measurement results with units, and whether the outcome was pass or fail. During mentor feedback sessions—at least five over the placement—document what the mentor evaluated, the standard they referenced, and any corrective action you will take or confirmation that your work met the standard. These notes protect you, demonstrate professional growth, and are required for your placement grade.

Meeting Your Performance Standard

Your mentor rates each major task on a 4-point rubric. A score of 3 means your work meets the trade standard; a 4 means it exceeds it. You need an average of 3.0 or higher at the midpoint check-in (around hour 90 of your placement) and must maintain or improve that average by the end. The path to a 3 on every task is simple: follow the standard, verify your work before calling it done, and ask your mentor before proceeding when you are unsure.

Key terms10

TIA-568A family of Telecommunications Industry Association standards that specifies how copper and fiber cabling should be installed, terminated, and tested in commercial buildings, including pin-out assignments and channel performance limits.
Cable certifierA field test instrument that runs a full suite of measurements (wiremap, length, insertion loss, NEXT, return loss, and others) on a completed cable link and compares results against a selected category standard to issue a PASS or FAIL verdict.
OTDR (Optical Time-Domain Reflectometer)A fiber-optic test instrument that sends light pulses into a fiber and measures reflections over distance to locate and quantify events such as splices, connectors, bends, and breaks.
IPC-J-STD-001An industry standard published by IPC that defines materials, processes, and acceptability requirements for soldered electrical and electronic assemblies, organized into three quality classes.
Fusion splicerAn instrument that permanently joins two optical fiber ends by applying a precisely controlled electrical arc to melt and fuse the glass, producing a low-loss continuous fiber path.
Lockout/Tagout (LOTO)An OSHA-required procedure for controlling hazardous energy: the authorized worker isolates the energy source, applies a personal lock and tag, and verifies zero energy before beginning work.
Insertion lossThe reduction in signal power caused by a cable link, connector, or splice, measured in decibels (dB); lower values indicate less signal loss and better performance.
T568A / T568BThe two standard pin-out wiring schemes defined in TIA-568 for eight-position modular (RJ-45) connectors; a project must use one scheme consistently throughout to avoid crossed pairs.
Fiber inspection scopeA magnifying optical or video instrument used to examine a fiber-optic connector end face for contamination, scratches, or physical damage before mating or testing; use prevents connector damage and inaccurate measurements.
Cold solder jointA defective solder connection formed when solder solidified before properly wetting the surfaces, typically appearing dull or grainy; it produces unreliable electrical contact and must be reflowed or replaced.

Worked examples4

1. You certify a Cat 6 permanent link and the certifier reports an insertion loss of 3.2 dB at the worst-case frequency. The TIA-568 Cat 6 limit for a permanent link at that frequency is 3.0 dB. Does the link pass or fail, and by how many dB?
  1. Identify the measured value: 3.2 dB insertion loss.
  2. Identify the limit: 3.0 dB maximum (lower is better for insertion loss).
  3. Compare: 3.2 dB exceeds the 3.0 dB limit by 3.2 − 3.0 = 0.2 dB.
  4. Because the measured loss is greater than the allowed maximum, the link fails.
Answer: The link FAILS insertion loss by 0.2 dB. Re-inspect the terminations, check for tight bends or staple damage, re-terminate if necessary, and re-certify.
2. An OTDR trace shows three events on a 500-meter fiber run. Event A (splice) at 150 m shows a loss of 0.08 dB. Event B (connector) at 350 m shows a loss of 0.45 dB. Event C is the far-end reflection at 500 m. What is the total accumulated loss from Event A and Event B combined?
  1. List the individual event losses: splice = 0.08 dB, connector = 0.45 dB.
  2. Add them: 0.08 + 0.45 = 0.53 dB.
  3. The fiber attenuation of the cable itself is not included here; only the discrete event losses were requested.
Answer: The total accumulated loss from the splice and connector is 0.53 dB.
3. Your mentor's mid-placement rubric scores for your six completed tasks are: 3, 2, 3, 4, 3, 3. What is your current average, and do you meet the 3.0 minimum required at the midpoint?
  1. Sum the scores: 3 + 2 + 3 + 4 + 3 + 3 = 18.
  2. Count the tasks: 6.
  3. Divide: 18 ÷ 6 = 3.0.
  4. Compare to the required minimum of 3.0.
Answer: Your average is exactly 3.0, which meets the minimum requirement. However, the score of 2 on one task should be addressed with your mentor so it does not pull your final average below 3.0.
4. You are pulling Cat 6 cable and need to leave a service loop inside a telecommunications room. The project specification calls for a 3-foot service loop at each end. If your cable run from the far wall to the patch panel is 187 feet (measured with the certifier), what total cable length did you need to pull, accounting for both service loops?
  1. Identify the run length: 187 feet.
  2. Identify the service loop at each end: 3 feet × 2 ends = 6 feet.
  3. Add: 187 + 6 = 193 feet total cable pulled.
Answer: You needed to pull 193 feet of cable to provide the measured run plus the required service loops at both ends.

The math in this lesson1

Learners compare measured insertion loss to TIA-568 limits and sum splice and connector event losses in dB.
N-Q.3
Brush up in the math halls at newSchoolWorks.com:
In class: Execute assigned daily production or service tasks (examples: pulling and terminating Cat 6 cable runs, cleaning and inspecting fiber connectors with an optical fiber scope, reflowing or inspecting solder joints on a PCB rework bench, labeling and testing completed cable segments with a cable certifier) and record each task in the daily log with tool names, measurement results, and pass/fail outcomes. · Participate in at least two employer team meetings or job-site walk-throughs during the placement, taking notes on project scope, safety tailboards, scheduling, and quality checkpoints, then summarize each meeting in the worksite log. · Request and document at least five mentor feedback sessions—one per approximately 36 field hours—in which the mentor evaluates a specific completed task against trade standards (TIA cabling standards, IPC-J-STD-001 solder quality, OSHA electrical safety rules) and the student writes a corrective action or confirmation note in the log.
Materials: Tools and test equipment provided or approved by employer (examples: cable certifier, OTDR, fusion splicer, multimeter, soldering station, label printer, coax stripper and crimper), employer work orders or traveler documents, daily worksite log, TIA-568 quick-reference card, IPC-J-STD-001 acceptable-quality visual guide
Check: Employer mentor rates each major completed task on the program's 4-point task rubric (1 = unacceptable, 2 = needs improvement, 3 = meets standard, 4 = exceeds standard); student must average 3.0 or higher across all rated tasks recorded by the midpoint check-in (approximately hour 90) and maintain or improve that average by placement end.

Practice check8

Answer each question, then check it. Nothing is recorded; this is your own practice.

Structured cabling installation and testing (BICSI Installer / ETA CET)
1. After terminating a Cat 6 patch cord, a cable certifier reports a wiremap fault showing that pins 3 and 6 are swapped at one end. What is the most likely cause?
Fiber-optic installation and maintenance (ETA FOI/FOT)
2. Before mating two fiber-optic connectors, you inspect the end faces with a fiber scope and see contamination on one face. What is the correct next step?
PCB soldering and inspection (ETA CET)
3. According to IPC-J-STD-001, what visual characteristic most clearly identifies a cold solder joint?
Electrical safety and OSHA compliance (ETA CET / BICSI Installer)
4. A worker is about to disconnect a patch panel connection on a building backbone cable that may still be active. Which OSHA-required practice must be followed before touching the conductors?
Fiber-optic testing and troubleshooting (ETA FOI/FOT)
5. An OTDR event at a fiber connector shows a loss of 0.8 dB. A typical acceptable connector loss for a well-installed multimode connector is generally considered to be 0.75 dB or less. What action is indicated?
Professional practice and documentation (Externship)
6. During your worksite placement, your mentor reviews a completed coax connector termination and asks you to document the feedback. Where must this documentation be recorded?
RF cabling and connector installation (ETA CET)
7. You are staging an RF antenna system and need to attach an N-type connector to a length of coaxial cable. After stripping the cable, which dimension is most critical to verify before crimping?
Professional practice and self-assessment (Externship)
8. At your midpoint check-in (approximately hour 90), your rubric scores for five rated tasks are: 4, 3, 2, 3, 3. What is your current average, and what does it mean for your placement standing?
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