Test & Measurement Challenges: Answers and Winners
Environmental Test Challenge #1: January 2008
Question
During vibration testing, most mechanical failures are blamed on which factor?
a) Test sample displacement.
b) Test sample force.
c) Test sample resonance.
d) Test sample frequency.
e) All of the above are equally responsible for mechanical failures.
Answer: The correct answer is c.
Winner: The winner of the $100 Best Buy gift card (courtesy of contest sponsor Cincinnati Sub-Zero) is Kevin Parmenter, Chandler, AZ.
RF Measurement Challenge #3: December 2007
Question
Does WiMAX Wave 2 provide improved coverage or higher data throughput?
a) It provides both—using Matrix A and B configurations, you can improve coverage and improve the data throughput.
b) It provides improved coverage, with only a slight loss in data throughput.
c) It provides higher data throughput, although with somewhat reduced coverage.
Answer: The correct answer is a.
Winner: The winner of the TomTom ONE navigation system (courtesy of contest sponsor Keithley Instruments) is Tony Vaghy, San Diego, CA.
RF Measurement Challenge #2: November 2007
Question
You are making RF measurements on a two-port RF amplifier with input at port 1 and output at port 2. Which of the following statements about S-parameters is true?
a) s11 is the voltage reflection coefficient.
b) s12 is the forward voltage gain.
c) s21 is the reverse voltage gain.
d) All of the above.
e) All but A.
f) All but B.
g) All but C.
Answer: The correct answer is a.
Winner: The winner of the TomTom ONE GPS system (courtesy of contest sponsor Keithley Instruments) is Andrew Watson, Irvine, CA.
RF Measurement Challenge #1: October 2007
Question
Which of the following characteristics contribute to an RF signal analyzer’s dynamic range, according to a report in the Test & Measurement World archives? ?a) Third-order intercept level.
b) Displayed average noise level.
c) Phase-noise performance.
d) All of the above.
e) Statements a and b.
f) Statements b and c.
g) Statements a and c.
Answer: The correct answer is d.
Winner: The winner of the TomTom ONE navigation system (courtesy of contest sponsor Keithley Instruments) is Sandip Sengupta, Lowell, MA.
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