單項選擇題Which of the following will not increase system capacity? （）

A. Increasing the number of available frequencies.
B. Changing the modulation scheme.
C. Implementing half rate vocoders
D. Going from a 4/12 to a 3/9 reuse pattern.
E. Splitting cells


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1.單項選擇題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. Contract with owner
E. Availability of transmission to the BSC

2.單項選擇題Which cell pattern is recommended for use with frequency hopping?（）

A. 4/12
B. 3/9
C. 7/21
D. 7/7
E. None of these

3.單項選擇題What does Grade of Service (GoS) mean? （）

A. Number of available subscriber services
B. Number of unsuccessful call set-ups due to congestion
C. Channel utilization
D. Number of successful call set-ups
E. Number of dropped calls

4.單項選擇題What type of interference is produced by other transmitters on the same frequency? （）

A. Double interference
B. Co-channel interference
C. Adjacent channel interference
D. Reflected interference
E. Timing interference

5.單項選擇題Which unit is used for measuring traffic? （）

A. Erlang
B. Bit/second
C. Hertz
D. Subscribers/kHz
E. Subscribers/minute