單項(xiàng)選擇題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.單項(xiàng)選擇題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.單項(xiàng)選擇題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.單項(xiàng)選擇題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.單項(xiàng)選擇題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.

5.單項(xiàng)選擇題Which cell pattern is recommended to use when using frequency hopping? （）

A.4/12
B.3/9
C.7/21
D.7/7