GSM 1800 GSM 900
A) 1840 - 1920 MHz 1700 - 1790 KHz 880 - 925 KHz B) 1930 - 1990 KHz 1805 - 1850 KHz 935 - 960 KHz C) 1850 - 1910 MHz 1710 - 1785 MHz 890 - 915 MHz D) 1920 - 1980 MHz 1820 - 1870 MHz 925 - 970 MHz
22. Which type(s) of frequency hopping can be used by the RBS 2000? A) Synthesizer Hopping & Baseband Hopping B) Synthesizer Hopping C) Baseband Hopping
D) Synthesizer Hopping, Baseband Hopping, & Gaussian Hopping
23. Which type of CDU is a narrowband combiner? A) CDU-A B) CDU-C C) CDU-C+ D) CDU-D
24. During normal network operation the Base Station Timing ______________ and sent to other RBS units.
A) is generated in the ECU’s Central Timing Unit
B) is synchronized in the DXU using T1 frame sync, or generated from TS 0 (E1).
C) is generated in the #1 TRU
D) is received via the Air interface
25. The TRUD block in the TRU performs which function(s)? A) TRU Control and interface functions
B) Downlink signal modulation and amplification C) Uplink signal demodulation and routing D) All of the above
26. A duplex filter ____________.
A) makes it possible to transmit and receive, using the same antenna B) is used for TX diversity
C) makes it possible to combine received signals. D) both A & B
27. The PSUs are responsible for __________________ A) controlling the usage of the backup batteries
B) receiving the input AC main supply and distributing it throughout the cabinet
C) transforming and rectifying input AC power and distributing it D) supervising power management and controlling the charging of the backup batteries
28. Which of the following can the OMT perform? A) Read the cabinets Installation Database
B) Reconfigure the cabinets Installation Database C) Display faults in the RBS D) All of the above 1 B 2 D 3 D 4 B 5 B 6 D 7 D 8 C 9 B 10 D 11 A 12 A 13 C 14 B 15 C 16 A 17 B 18 A 19 B 20 D 21 C 22 A 23 D 24 B 25 A 26 A 27 C 28 D 29 30
