Final Assessment — ADF SYSTEMS — ANTENNA DIRECTION FINDING

TM-TOOL-001 — Open Handout Course: TM-TOOL-001 Reference: TM-TOOL-001 handout Questions: 15 Passing score: 13/15 (87%). All calculation questions (Q6–Q9) must be correct. Time limit: 20 minutes Notes: Closed handout. No references during the assessment.

Questions

Q1. What is the operating principle of the ADF SYSTEMS — ANTENNA DIRECTION FINDING? State it in one sentence using technical terms.

Q2. 2-1 Watson-Watt Method Explain the significance of this principle for measurement accuracy.

Q3. What is the primary source of measurement error for the ADF SYSTEMS — ANTENNA DIRECTION FINDING as stated in Chapter 2? What operating technique minimizes this error?

Q4. Chapter 3 specifies particular component types for the ADF SYSTEMS — ANTENNA DIRECTION FINDING. Name two components where a wrong substitution would degrade RF performance and explain why.

Q5. What is the first step of the Chapter 4 assembly procedure? Why must assembly steps be performed in the specified order?

Q6. [Calculation] Using the formula from Appendix A (the primary formula from Appendix A): Apply it to a realistic scenario with the ADF SYSTEMS — ANTENNA DIRECTION FINDING. Show all work and state the result with units.

Q7. [Calculation] Using the formula: a second formula from Appendix A Calculate a result for a specific measurement. Show all work.

Q8. [Calculation] During a measurement with the ADF SYSTEMS — ANTENNA DIRECTION FINDING, you observe a reading of X. The expected (reference) value is Y. Compute the error in % and in appropriate units. (Use X = your measured value from the Unit 5 lab; Y = the acceptance criterion.)

Q9. [Calculation] The Chapter 5 operating procedure requires a specific numerical computation to interpret a measurement. State the formula and solve it for a given set of inputs. Show all work.

Q10. What does Chapter 5 specify as the correct action if a measurement produces an unexpected result during normal operation?

Q11. What is the acceptance criterion stated in Chapter 7 for the ADF SYSTEMS — ANTENNA DIRECTION FINDING? State it exactly: value, units, and condition.

Q12. What is the difference between the Chapter 6 calibration procedure and the Chapter 7 verification procedure? Which permits adjustments?

Q13. During Chapter 7 verification, one check fails. You make an adjustment and re-check. Is this acceptable? What is the correct action per the TM?

Q14. List four items required in a calibration log entry per Chapter 7.

Q15. After completing Chapter 7 verification, all checks pass. What conclusion can you draw about the ADF SYSTEMS — ANTENNA DIRECTION FINDING? What conclusion can you NOT draw?

— Turn page for answer key —

Answer Key

All answers directly verifiable from TM-TOOL-001.

A1. See TM §2-1. The answer is the first substantive statement of Chapter 2. TM ref: §2-1

A2. See TM §2-1. The significance is in the paragraph following the principle statement. TM ref: §2-1

A3. See Chapter 2. The error source is identified by words like "dominant," "primary," or as the first-listed limitation. TM ref: Ch. 2

A4. See Chapter 3. Look for items where the TM specifies "non-inductive," a specific ferrite material, or a minimum tolerance — these are where substitutions matter most. TM ref: Ch. 3

A5. See Chapter 4, step 1. The reason for sequence is usually stated in the introductory paragraph of Chapter 4 or implied by the physical dependencies between steps. TM ref: Ch. 4, step 1

A6. Formula: the primary formula from Appendix A. Any physically plausible input values give a correct answer if the computation is done correctly. TM ref: App. A

A7. Formula: a second formula from Appendix A. Show substitution, arithmetic, and result with units. TM ref: App. A

A8. Error (%) = (measured − expected) / expected × 100. Error (units) = measured − expected. TM ref: App. A, Ch. 7

A9. See Chapter 5. The formula and its application are in Chapter 5 or Appendix A. TM ref: Ch. 5, App. A

A10. See Chapter 5. The correct action for an unexpected result is always: stop, diagnose the cause, do not proceed until the discrepancy is explained. TM ref: Ch. 5

A11. Criterion: within ±1°). Check your wording against the TM — units and numeric value must match exactly. TM ref: Ch. 7

A12. Calibration (Ch. 6) allows adjustments to bring the tool within specification. Verification (Ch. 7) confirms the result and allows no adjustments. Calibration permits adjustments; verification does not. TM ref: Ch. 6, Ch. 7

A13. No — making an adjustment during verification invalidates the verification. Correct action: stop verification, return to Chapter 6 calibration, then repeat the full Chapter 7 verification from the beginning. TM ref: Ch. 7

A14. See Chapter 7, final steps. Typical items: date, equipment used, measured values, acceptance criteria, pass/fail determination, operator name. TM ref: Ch. 7

A15. You CAN conclude: the tool is performing within its specified accuracy at this time and under these conditions. You CANNOT conclude: it will remain in calibration indefinitely, or that it was in calibration before this verification. TM ref: Ch. 7

Score Routing

Question → Unit map: Q1–Q3 → Unit 1 (Theory); Q4–Q5 → Units 2–3 (Construction/Assembly); Q6–Q9 → Unit 4 (Calculations); Q10 → Unit 4; Q11–Q15 → Unit 5 (Calibration/Verification).