单项选择题What is the ERP (Effective Radiated Power), if the output power from the radio is 43 dBm, the cable losses 3 dB, and the antenna gain 14 dBd? ()

A.43dBm
B.54dBm
C.32dBm
D.60dBm
E.23dBm


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1.单项选择题What is the point of using a combiner? ()

A. Up to four sites can share one PCM link.
B. Several TRXs can share one antenna system.
C. The mobile can listen to two base stations at the same time.
D. Only one base station is needed per site.
E. Sending and transmitting can be performed from the same antenna.

2.单项选择题Which of the following is not necessary to consider when surveying a potential site? ()

A. Space for antennas
B. Frequency allocation
C. Electrical power availability
D. Permission/Contract with owner
E. Availability of PCM link to the BSC

3.单项选择题A subscriber makes a two-minute call and a four-minute call during the busy hour. How much traffic does he generate for that hour? ()

A.33 millierlangs
B.66 millierlangs
C.100 millierlangs
D.10 millierlangs
E.25millierlangs

4.单项选择题Reusing frequencies in a cellular pattern (compared to “one big cell”)()

A. Increases channel utilization, cost ,and interference.
B. Increases capacity and cost, but decreases interference.
C. Increases capacity, but decreases cost and interference.
D. Increases capacity, cost, and interference.

6.单项选择题Which of these is not a prediction model for radio coverage? ()

A.Algorithm-9999
B.Cost-231
C.Okumura-Hata
D.Printhana
E.Walfish-Ikegami

7.单项选择题Which of these assumptions is necessary to use in system balance? ()

A.The sensitivity is the same for the MS and the BTS.
B. The path loss is the same for the MS and the BTS.
C. The feeder loss is the same for the MS and the BTS.
D. The antenna gain is the same for the MS and the BTS.
E. The combiner loss is the same for the MS and the BTS.

8.单项选择题What is system balance? ()

A. Each cell can handle the same amount of subscribers
B. The network is dimensioned for all mobile classes
C. All cells are of the same size
D. All BTSs use the same output power
E. Uplink and downlink coverage is the same