12/25/2007 Engineering & Science 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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Cruciverbalist:

A cruciverbalist is a person who is skilled at creating or solving crossword puzzles. The term is a combination of "cruci-" from "crucifix," meaning cross, and "verbalist" from "verbal," indicating a person who deals with words. cruciverbalists are often responsible for designing crossword puzzles, and they possess a deep knowledge of wordplay, vocabulary, and the techniques used in constructing and solving crosswords. They aim to make puzzles that are both challenging and enjoyable for crossword enthusiasts.

Reproduction of this puzzle without the express permission of RF Cafe is prohibited.
ACROSS 1. Electric eye 9. Angular speed unit, abbr. 10. PCB through connection 12. Type of chart 14. Rádio Nacional de Angola, abbr. 16. Fan vendor in San Ysidro, CA, 17. Company that makes test cables, Everett, WA 18. Opposite of I.D. 19. Peripheral Component Interface 21. Min-to-max voltage of a waveform 22. European equivalent to the U.L. 23. American equivalent of C.E. 24. The largest asteroid 25. Summation symbol 26. Type of IC package, pl. 28. Radio term for indicating the end of a transmission segment 29. International phonetic alphabet letter "I" 32. Forerunner to NASA 33. Unit of time 34. Chemical symbol for praseodymium 35. Home state of Los Alamos lab 36. Max or min voltage of a waveform 37. Total Radiated Power 40. Chemical symbol for selenium 41. Electronics manufacturer with "meatball" logo 43. Component of product cost, abbr. 45. Common battery cell size 46. Executable software 49. Audio Frequency 50. Yard, abbr. 51. Family of TTL logic 52. Radar display, abbr. 53. Test Point or Toilet Paper 54. Chemical symbol for cesium 55. Infrared, abbr. 56. Picohenry, abbr. 57. Type of current flow 58. Chemical symbol for tantalum 60. One port of an amplifier 62. Chemical symbol for helium 63. Portion of signal not transmitted to the load 68. Greek letter (micro) 69. Modulation type, abbr. 70. Erbium Doped Fiber Amplifier 71. Fixed size group of bits 72. Modern battlefield technique, abbr. 73. 1e-6 mA 74. Electromagnetic 76. Colpitts, Armstrong, Hartley, etc. 77. The part of a circle enclosed between an arc and a chord 83. The fourth state of matter, pl. 88. One state of matter 89. Data storage units 90. Maximum Usable Frequency 91. Oscillator manufacturer in Whippany, NJ (abbr.)	DOWN 2. Vacuum amplifier tubes 3. Infinite resistance 4. Decimeter, abbr. 5. Boob tube 6. Antenna radiated power measurement, abbr. 7. Second brightest star 8. Type of component attachment format, 2 wds. 11. Concentric transmission line 12. Instructions 13. Networks International Corporation, abbr., manufacturer of custom RF & microwave filters, Overland Park, KS 15. Amplifier vendor in Philadelphia, PA 19. 10^-12 numerical prefix 20. Stock symbol for Intel 26. Coaxial cable/connector manufacturer headquartered in München Germany, pl. 27. Marconi's transmitter configuration, 2 wds. 30. Stock symbol for National Semiconductor 31. Innovative Power Products, Holbrook, NY, abbr. 38. Solder type cable termination manufacturer, now owned by Tyco 39. PCB areas for mounting circuit components 40. Joined two wires together 42. One port on a BJT 43. Stock symbol for National Instruments 44. Mixer vendor in Sacramento, CA 47. Lubricant 48. Angular speed unit, abbr. 56. Representation of a sine wave whose amplitude, phase, and frequency are time-invariant 57. Length times width, pl. 59. Summer 61. Engineering firm in Middletown, OH, that provides RF subsystem design services 64. Femtofarad, abbr. 65. Chemical symbol for lanthanum 66. Pure carrier, abbr. 67. Part of a FOR loop 73. Chemical symbol for nobelium 75. 1E6 nanoseconds 78. Global System for Mobile Communications 79. Minutes of Use, abbr. 80. 30 Hz to 300 Hz 81. Chemical symbol for nickel 82. Time delay, abbr. 83. Picofarad, abbr. 84. Chemical symbol for lithium 85. Automatic Level Control 86. Adjust a pot 87. Degree of IC sophistication
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