Satellite Communication Set 2

1992-93 ✘ 1991-92 ✘ 1989-90 ✘ 1993-94 ✔

EHF ✘ UHF ✘ VHF ✘ SHF ✔

moon ✘ sun ✘ earth ✘ all of the above ✔

Satellite spacing is not affected by the bandwidth of the transmitting earth station ✘ Beamwidth is independent of antenna size and frequency band used ✘ The width of a beam in space is inversely proportional to the width of the transmitting antenna ✘ Use of high-frequency bands permits less number of satellites to share the orbit ✔

waits for positive or negative acknowled-gement from the receiving terminal after sending a block ✘ sends another block if positive acknowledge is received through ACK character ✘ resends the previous block if negative acknowledgement is received through a NAK character ✘ does not wait for acknowledgement after sending a block ✔

hangs motionless in space about 36000 km about Earth ✘ travels around the Earth in 24 hours ✘ remains stationary above the Earth ✘ appears stationary to everybody on Earth ✔

102° E longitude over Sumatra

✘

90° E longitude over Bangladesh

✘

74° E longitude over India

✘

67° E longitude over Pakistan

✔

100 ✘ 500 ✘ 2000 ✘ 1000 ✔

40 ✘ 10000 ✘ 100 ✘ 10 ✔

500 GHz ✘ 1000 GHz ✘ 1000 MHz ✘ 500 MHz ✔