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BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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1/24/2005 Engineering Crossword Puzzle

Take a well-deserved break and try your hand at some of these goodies. Every word in the RF Cafe crossword puzzles is specifically related to engineering, mathematics, and science. There are no generic backfill words like many other puzzles give you, so you'll never see a clue asking for the name of a movie star or a mountain on the Russia-China border.

All of these crossword puzzles were created using the fabulous Crossword Express (now called "Magnum Opus") software.

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Engineering & science crossword puzzle

ACROSS

1 Nonlinear byproducts

9 Government lawyers, abbr.

11 Motorola's "Digital ___"

12 Symbol for helium

13 Unit of time, abbr.

14 Unix, Linux or Windows

16 Max or min voltage of a waveform

19 High Data Rate

21 Miniature RF connector

23 Front edge of a wing, abbr.

25 Unit of acidity, abbr.

27 Integrated Circuit

29 Unit of power

31 PC follower

32 "Microwaves & __" magazine

33 Employed

35 Mate to a TX

36 Logic gate

37 Data conversion device, abbr.

38 Singulated piece of IC wafer

40 Field Programmable Logic Array

42 Memory operation

44 Family of TTL logic

45 GSM band below PCS

46 Underground Service

47 Followed by the AT

48 RF Integrated Circuit

50 Start frequency, abbr.

51 Super glue, abbr.

52 Computer Assisted Design and Development

54 1/000 of an amp

55 Underground Feeder

56 Quality Assurance

57 Solar power energy source

59 Error checking scheme, abbr.

62 Part of a FOR loop

63 Infrared

64 Band between RF and BB

66 Related to FM by a differential

68 PCB through-hole

71 Global System for Mobile Communications

72 Voltage / current

DOWN

2 Opposite of O.D.

3 Symbol for tin

4 Transformer interwinding connections

5 Relative Humidity

6 Test Equipment, abbr.

7 Switch position

8 National Science Board

9 Vector multiplication resulting in a scalar

10 Chemical symbol for arsenic

15 Opposite of I.D.

17 Coupler, amplifier vendor in Cerritos, CA

18 ___-Azimuth telescope mount

20 Reduced Instruction Set Computer

22 No insulation

24 Digital counterpart to LaPlace transform

26 3 MHz to 30 MHz

28 European equivalent to the U.L.

30 Mate to an RX

31 Overpriced online service

33 User Datagram Protocol

34 Direct Digital Synthesis

37 Modulation type

39 Type of digital filter implementation

40 U.S. Spectrum allocation agency

41 Unit of time, abbr.

43 World's only remaining superpower, abbr.

44 Laptop computer monitors

45 Bilateral trigger diode

47 Last stage in a transmitter, abbr.

49 Radio band in your car

50 Upper frequency, abbr.

52 Software drafting tool

53 Device Under Test

58 Exploding star, or really sad Chevy of yesteryear

60 Component of product cost, abbr.

61 Type of digital filter implementation, abbr.

63 Network department, abbr.

65 Chemical symbol for iron

66 Ratio of circumference to diameter

67 1E6 nanoseconds

69 One port of an amplifier

70 Type of current flow

Reproduction of this puzzle without the express permission of RF Cafe is prohibited.