1) What Signals through Optical Fiber for specific application? A) ASK B) PSK 2)
ID: 3771829 • Letter: 1
Question
1) What Signals through Optical Fiber for specific application?
A) ASK
B) PSK
2)What is Plesiochronouse System?
A) Minor timing variations but keeps the system within acceptable limits for long strings of zeros
B) Uses bipolar transitions of every bit period to achieve the level of synchronization to receive high speed transmission.
C) Uses parallel media to transmit pulses simultaneously and timing pulses
3) Which of the following is not true statement about SONET?
A) It reconfiguration mechanized of DS-3 signals by using ADM equipment.
B) It has reliability through the redundancy of SONET fiber rings.
C) STS-1 has two compression electrical signals through one OC-1 optical signal
4) What QAM utilizes for in Modulation Schemes?
A) PCM and FDM
B) QPSK and PCM
C) AM and QPSK
Explanation / Answer
1.The ASK(Amplitude-shift keying) technique is also commonly used to transmit digital data over optical fiber.
2.B) Uses bipolar transitions of every bit period to achieve the level of synchronization to receive high speed transmission.
3.STS-1 has two compression electrical signals through one OC-1 optical signal
4.AM and QPSK
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