1. Extended superframe – 576 channels
2. Delta Modulation – slope overload is common problem
3. T1 – most common carrier line for telephones
4. 100 dB - RF and IF gain in receiver
5. 0.9 – velocity factor for open wire
6. 0.8 – velocity factor for twin lead
7. Critical frequency of F2 – 8 MHz
8. Ephemeris – location of a celestial body in space
9. troposcatter – 350 MHz to 10 GHz
10. End impedance of HW dipole – 2500Ω
11. single hop night time range of F2 – 4130 km
12. 3300 m/s – speed of sound in wood
13. GSM/TDMA – cannot execute soft handoff because cellsites use different sets of frequencies to communicate with each other
14. 20 phons – typical loudness level of ticking watch
15. M88 – 88 mH coil; every 9000 feet
16. Hybrid Transformer – 2 wire to 4 wire converter
17. click – square wave; rounding off something
18. SDMA – Spatial Div. Multi Access; use same frequency in multiple focused beams aim at different areas
19. IS 95 – became CDMA 2000
20. International pitch A – 435 Hz
21. Hash – 128 bits sequence in digital signature
22. Envelope Delay Distortion – caused by freq. dependent attenuation chars of transmission lines
23. POP3 – Post Office Protocol version 3
24. Why use geosynchronous satellites? To simplify tracking requirements
25. BISYNC – not a bit oriented protocol
26. flag filed for SDLC/HDC – 7Eh
27. Bit stuffing – to prevent accidental flag fields?
28. Blank and Burst – interrupt voice feed to send control signals (cellular telephony)
29. fiber optics are preferred to satellites for long distance telephone transmission because of less delay
30. real time of info – found in circuit switching
31. mechanical splicing
32. fusion splicing – the ends are melted together
33. 2 mV – TV video signal level
34. for CATV : (noise free picture)
a. 1 mV for 75Ω
b. 2 mV for 300Ω
35. Synchronous demodulation – process of getting the info from the chroma signal
36. CW Doppler Radar – used by police
37. CTCS – Continuous Tone Control Squelch; low frequency tones only
38. EO 196 – control of PHILCOM SAT to NTC
39. P 5000 – fine for no permit (MPDP)
40. P 5000 – per unit fine of unauthorized cellphone service
41. P 100 K – paid up capital
42. P 1200 – permit for MPD
43. P 300- license for CATV head end
44. Differential Peak
45. Sun Detector – orientation of sunlight
46. Blooming – trapped gas pockets in fiber cables
47. Service numbers – 3 digit number with specialized service
48. smart card – card with embedded IC
49. armature – part of dc radio gen which is grounded to reduce radio noise
50. MPEG4 - current video compression standard
51. 6 to 10 dB – noticeable change in loudness level
52. noise figure: (with equalizer)
a. 330 MHz – 9.5 dB
b. 54 MHz – 7.5 dB
53. 12 dB – visual signal level for channels that have other than 6MHz nominal separation
54. 3 dB – visual signal level for channels that have 6MHz nominal separation
55. 13 to 17 dB – sound carrier lower than visual carrier
56. Cross Luminance – diagonal patterns
57. S unit – 6 dB
58. MPDP – apply at NTC regional office of area to service
59. 24.3 kBaud/sec – modulation rate for D-AMPS
60. 150 µV – receiver preampt input (CATV)
61. SSB – 200 Hz shift results in material degradation
62. +- 25V – max voltage to apply (data)
63. GMDSS – Global Maritime Distress and Safety System
64. AMPS – 10 kbps
65. Positive Carrier Shift – insufficient grid mod at grid modulation ckt
66. Negative Carrier Shift – insufficient grid mod at high power modulation
67. 100 milliroentgents/week exposure
68. 0.5 milliroentgents per hour from 5 cm
69. camera pickup tube – yellow green is most sensitive
70. wan topologies:
a. leased line
b. circuit switching
c. packet switching
71. <5% - interference to visual signal level
72. Measuring rad exposure – device should have area max 10cm2 max linear dimension is 5cm
73. 3 channels – separation between geographically adjacent stations to minimize interference
74. downtilt – limit range
75. GPS – uses CDMA for multiple access tech
76. 1800 Hz – reference frequency for envelope delay distortion measurement
77. Two tone test – SSB method in testing AM transmitter
78. Pump laser – to higher energy level
79. MPEG2 – Discrete Cosine Transform
80. IMTS – Improved Mobile Tel System; Bell
81. PON – not needing to install expensive equipment at every terminal
82. Ethernet – uses 3 level Manchester
83. CT 2 – portable payphone booth
84. SSB - assigned frequency is 1.4 kHz above carrier frequency
85. Linear amplifier – frequency instability for J3E because there’s no carrier reference
Horn and slot – direct connection to waveguides
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