CURRENT ISSUE
Contests
Test your eq
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Issue #212 March 2008
Problem 1—The master clock on a GPS satellite is set to 10,229,999.99545 Hz. Why such an “odd” value? Answer
Problem 2—What is the relationship, if any, between the GPS master clock and the GPS microwave carrier frequencies L1 and L2? Why are two different frequencies used? Answer
Problem 3—Both Verilog and VHDL support the concept of compile-time adjustments to the design of a particular module, in addition to the real-time signals that pass into and out of it. What is the specific syntax in each case? Answer
Problem 4—For the data structure commonly known as a “hash” (“associative array” in some scripting languages), what is the difference in overall performance (in order-of-magnitude terms) between storing items into the array and reading them out again? Answer
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