ExtraClassSylalbus2009jan-AD7FO

Recommendations

Info

Rev 2.02 SUBELEMENT E8 -- SIGNALS AND EMISSIONS [4 Exam Questions -- 4 Groups] E8A AC waveforms: sine, square, sawtooth and irregular waveforms; AC measurements; average and PEP of RF signals; pulse and digital signal waveforms E8A01 A square wave is made up of a sine wave plus all of its odd harmonics. E8A02 A sawtooth wave has a rise time significantly faster than its fall time (or vice versa). or E8A03 A sawtooth wave is made up of sine waves of a given fundamental frequency plus all of its harmonics. E8A04 The equivalent to the root-mean-square value of an AC voltage is the equivalent DC voltage that causes the same amount of heating in a resistor. RMS=.707 peak E8A05 The most accurate way of measuring the RMS voltage of a complex waveform is by measuring the heating effect in a known resistor. In precision measuring instruments a filament is heated with a current from an AC circuit and its temperature is measured by the voltage generated in a thermocouple attached to it. Then a DC current is applied to generate the same thermocouple voltage output. This dc current is then equal to the AC RMS current. Jack Tiley <strong>AD7FO</strong> Page 80 3/15/2009
Rev 2.02 E8A06 The approximate ratio of PEP-to-average power for a typical voice-modulated single-sideband phone signal is 2.5 to 1. E8A07 The characteristics of a modulating signal determine the PEP-to-average power ratio of a single-sideband phone signal. E8A08 The period of a wave is the time required for it to complete one cycle. E8A09 An Irregular waveform is produced by human speech. This is because human speech is complex and contains many frequencies. E8A10 The distinguishing characteristic of a pulse waveform is narrow bursts of energy separated by periods of no signal. E8A11 Digital data transmission is one use for a pulse modulated signal. E8A12 Human speech, Video signals and Data information can all be conveyed using digital waveforms. E8A13 One advantage of using digital signals instead of analog signals to convey the same information is that digital signals can be regenerated multiple times without error. E8A14 Sequential sampling is commonly used to convert analog signals to digital signals. E8A15 The waveform of a digital data stream signal would look like a series of pulses with varying patterns on a conventional oscilloscope. E8B Modulation and demodulation: modulation methods; modulation index and deviation ratio; pulse modulation; frequency and time division multiplexing E8B01 Modulation index is the term for the ratio between the frequency deviation of an RF carrier wave, and the modulating frequency of its corresponding FM-phone signal. Jack Tiley <strong>AD7FO</strong> Page 81 3/15/2009
Page 1 and 2:
Rev 2.02 Preparing for the Extra cl
Page 3 and 4:
Rev 2.02 Guide to using this syllab
Page 5 and 6:
Rev 2.02 SUBELEMENT E4 -- AMATEUR R
Page 7 and 8:
Rev 2.02 ELEMENT 4 - EXTRA CLASS QU
Page 9 and 10:
Rev 2.02 E1A09 (Band Plan Chart) Th
Page 11 and 12:
Rev 2.02 E1B13 (FCC Rules) Communic
Page 13 and 14:
Rev 2.02 E1D08 (FCC Rules) The 2 me
Page 15 and 16:
Rev 2.02 E1E20 (FCC Rules) You must
Page 17 and 18:
Rev 2.02 SUBELEMENT E2 - OPERATING
Page 19 and 20:
Rev 2.02 E2A13 Geosynchronous satel
Page 21 and 22:
Rev 2.02 E2B17 Immunity from fading
Page 23 and 24:
Rev 2.02 E2D02 The definition of
Page 25 and 26:
Rev 2.02 SUBELEMENT E3 -- RADIO WAV
Page 27 and 28:
Rev 2.02 E3C01 Auroral activity cau
Page 29 and 30: Rev 2.02 E4A06 A spectrum analyzer
Page 31 and 32: Rev 2.02 E4B09 High impedance input
Page 33 and 34: Rev 2.02 E4C06 If t he thermal nois
Page 35 and 36: Rev 2.02 E4D11 Third-order intermod
Page 37 and 38: Rev 2.02 SUBELEMENT E5 -- ELECTRICA
Page 39 and 40: Rev 2.02 E5B Time constants and pha
Page 41 and 42: Rev 2.02 Example 2: To find the ang
Page 43 and 44: Rev 2.02 j 50 -j 25 E5B12 The phase
Page 45 and 46: Rev 2.02 j 600 -j300 E5C04 In polar
Page 47 and 48: Rev 2.02 Parallel circuit solutions
Page 49 and 50: Rev 2.02 R=300 Ω XL= (2 π FL) or
Page 51 and 52: Rev 2.02 Power Factor represents th
Page 53 and 54: Rev 2.02 SUBELEMENT E6 -- CIRCUIT C
Page 55 and 56: Rev 2.02 Field-effect transistors e
Page 57 and 58: Rev 2.02 E6B12 Junction diodes are
Page 59 and 60: Rev 2.02 E6D02 Cathode ray tube (CR
Page 61 and 62: Rev 2.02 E6E04 The technique used t
Page 63 and 64: Rev 2.02 E6F07 Cadmium sulfide will
Page 65 and 66: Rev 2.02 E7A07 An AND gate produces
Page 67 and 68: Rev 2.02 When a Class C rather than
Page 69 and 70: Rev 2.02 E7C01 In a low-pass filter
Page 71 and 72: Rev 2.02 E7D02 One characteristic o
Page 73 and 74: Rev 2.02 E7E05 A pre-emphasis netwo
Page 75 and 76: Rev 2.02 E7F08 One purpose of a mar
Page 77 and 78: Rev 2.02 E7G17 The typical output i
Page 79: Rev 2.02 E7H19 A phase-locked loop
Page 83 and 84: Rev 2.02 E8B13 In time division mul
Page 85 and 86: Rev 2.02 E8D07 An electromagnetic w
Page 87 and 88: Rev 2.02 E9A10 Antenna bandwidth is
Page 89 and 90: Rev 2.02 E9B10 The “Method of Mom
Page 91 and 92: Rev 2.02 E9C09 The elevation angle
Page 93 and 94: Rev 2.02 E9D09 An advantage of usin
Page 95 and 96: Rev 2.02 E9E08 An SWR greater than
Page 97 and 98: Rev 2.02 E9F11 A 1/8-wavelength tra
Page 99 and 100: Rev 2.02 E9H05 The main drawback of
Page 101 and 102: Rev 2.02 SUBELEMENT E0 -- SAFETY [1
Page 103 and 104: Rev 2.02 Jack Tiley AD7FO Page 103
Page 105 and 106: Rev 2.02 Capacitors in series C= __
Page 107 and 108: Rev 2.02 Impedance of complex serie
Page 109 and 110: Rev 2.02 Calculating Component valu
Page 111 and 112: Rev 2.02 AC Voltage Calculations Th
Page 113: Rev 2.02 Jack Tiley AD7FO Page 113
show all

ExtraClassSylalbus2009jan-AD7FO

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?