发布时间 : 星期一 文章网络优化专业业务知识试题更新完毕开始阅读81d7cc1e5f0e7cd1842536ca
答案：C
53. How many paging requests can, at the most, fit into one paging block? A) 10 B) 20 C) 4 D) 60 E) 80 答案：C
54. AGBLK must be set to a non-zero value (that is = 1 in Ericsson’s GSM system), if:
A) Cell broadcast is used in a cell with a combined configuration.
B) Cell broadcast is used in a cell with a non-combined configuration. C) System information, type 4, is sent on the BCCH. D) System information, type 5, is sent on the BCCH. E) MFRMS=2 or MFRMS=9 答案：B
55. Which is the most important factor for determining the paging capacity in the BTS? A) MFRMS B) AQBLK
C) Paging strategy
D) Combined or non-combined mapping E) The use of cell broadcast 答案：D
56. To reduce co-channel interference by means of antenna tilt, some prerequisites must be met. Which of the below is not a prerequisite? A) Short site-to-site distance B) Sector antennas C) High gain antennas D) High mounted antennas E) Narrow vertical beam 答案：B
57. Null fill-in is obtained by:
A) Slightly adjusting the phase of the power fed to the different antenna elements. B) Slightly adjusting the power fed to the different antenna elements.
C) Slightly adjusting both the power and the phase fed to the different antenna elements.
D) Slightly tilting the antenna elements with respect to each other.
E) Continuously moving the antenna elements slightly with respect to each other. 答案：B
58. If the duplex distance is 45 MHz and the bandwidth is 14 MHz, which order of intermodulation products is the first to become a problem? A) 7 B) 30 C) 35 D) 36 E) 37 答案：A
59. A repeater can be used to:
A) Increase the capacity locally (in a traffic hot spot).
B) Increase the capacity along highways (Questions). C) Get better coverage on water.
D) Get better coverage where the area to be covered is blocked by obstacles. E) For none of these purposes. 答案：D
60. A Tower Mounted Amplifier (TMA) can be beneficial in some configurations due to its ability to:
A) Improve the downlink sensitivity and compensate for the downlink feeder loss. B) Improve the uplink sensitivity and compensate for the uplink feeder QUE loss. C) Improve both uplink and downlink sensitivities.
D) Improve the compensate for the downlink feeder loss E) Improve compensate for the uplink feeder loss. 答案：A
61. In a four-way power splitter, the /4-transformer changes the impedance of the input from 50 . to: A) 1 . B) 12.5 . C) 50 . D) 25 . E) 125 答案： B
62. The wave propagation prediction algorithm 9999 takes a lot into account, but not:
A) Land usage
B) Terrain QUE profile C) Curvature of the earth
D) Diffraction loss due to obstructing buildings 答案：D
63. Which of the following statements about the urban model is not true? A) Permanent screens, used in the half-screen part of the urban mode.
B) Temporary QUE screens, used in the half-screen part of the urban model. C) The recursive microcell part of the urban model uses something called the illusory distance.
D) The resulting path loss from the urban model is obtained by taking the maximum value of the two contributions, calculated by the half-screen and recursive microcell algorithms. 答案：D
64. What is the minimum required isolation between two TX antennas at the same site? A) 2dB B) 30 dB C) 4 dB D) 5 dB E) 6 dB 答案： B
65. What is the datum used internally by a GPS receiver called? A) RT90 B) WGS84
C) Bessel-B?hm D) Gnomonic
E) Universal Transverse Mercator
答案：B 66. TEMS speech quality index, SQI, is capable of producing speech quality estimates. What is not taken into account? A) Bit error distribution B) Q/I distribution C) Handover events
D) Frame erasure distribution E) DTX 答案： D
67. What is ICDM? A) Measurements
B) Qnterfered Matrix C) Inter Combined
D) Internal Disturbance
E) Inter Cell Dependency Matrix 答案：E
68. What is TET used for?
A) For automatic updates of the network. B) To find the right hot-spot location.
C) To predict the traffic distribution in the future. D) To find the right frequencies.
E) To perform measurements of the percentage of interfered traffic. 答案：B
69. What statement about cell split as a means of increasing capacity is true? A) A 1:4 split increases the capacity per square kilometer by a factor of eight. B) In a 1:3 split, the antenna directions on all sites that existed before must be changed 30 degrees.
C) In a 1:4 split must be changed 30 degrees.
D) A 1:3 split increases the capacity per square kilometer by a factor of six. E) All the statements above are incorrect. 答案：B
70. What is the average TCH reuse in a 12/8/7/4 MRP? A) 6.3 B) 17.5 C) 17.75 D) 18 E) 19 答案：A
71. What is meant by a “fractionally loaded” network? A) A network where DTX is used on both uplink and downlink. B) A network where the QUE data transmission is very bursty.
C) A network where the number of TRXs per cell is smaller than the number of hopping frequencies.
D) A network where the channel utilization never goes above Aserved/#TCHs.
E) A network where the “hardware load” is higher than the “frequency load”. 答案：C
72. Why are neighboring cell relations created before using the frequency planning tool?
A) To set hysteresis parameters. B) For export to CQNA.
C) To estimate adjacent -channel interference.
D) For application of carrier separation constraints. E) To estimate co-channel interference. 答案：D
73. What is true about microcells and picocells?
A) A picocell is an indoor cell, and a microcell is a cell with an antenna placed below the roof top.
B) A picocell is QUE umbrella cell, and a microcell is a normal cell. C) They both have the same function.
D) A picocell is used in Europé, and a microcell is used in the USA. E) A picocell is an indoor cell, and a microcell is a macro cell. 答案：A
74. How many antenna ports does the Multicasting Matrix Box (MCM) have? A) 1 B) 4 C) 6 D) 10 E) 18 答案：B
75. Calculate the EiRPs in the points A and B in the enclosed figure given that the power level at the start of the feeder chain is 10 dBm A) 1 dBm and -3.5 dBm B) -10 dBm and -5 dBm C) -40 dBm and -3.5 dBm D) -10 dBm and -4 dBm E) -10dBm and -3 dBm 答案：A 76. What does the modified Keenan-Motley model for indoor wave propagation path loss not directly consider? A) Transmitter distance
B) Floor attenuation (and the QUE number of floors traversed by the direct wave) C) Wall attenuation D) Distant attenuation
E) Reflection and diffraction 答案：E
77. What parameter is used to specify the output power at the locating reference point on BCCH carriers? A) QSTXPWR B) QSPWRT C) BSPWR D) QSRXSUFF E) QSPWRB 答案：C
78. What parameter is used for the output power at the locating reference point on non-BCCH carriers? A) QSPWR B) BSPWRB C) QSRXSUFF D) BSTXPWR E) QSPWRT