Which method needs precorrect time?

A. Open loop method
B. Closed loop method
C. Open & closed loop method
D. None of the mentioned

Explanation: In open loop method the frequency and time are precorrected.

In open loop method, the time reference error __________ with respect to time.

A. Increases exponentially
B. Decreases exponentially
C. Increases quadratically
D. Decreases quadratically

Explanation: In open loop transmitter synchronization system, the time reference error increases quadratically with time.

When a terminal is able to utilize the measurements made on the return link it is called as

A. Open loop method
B. Closed loop method
C. Quasi close loop method
D. None of the mentioned

Explanation: The case where a terminal is able to utilize the measurements made on a return link signal is called as quasi closed loop transmitter synchronization.

Which reduces the effective distance between signals in signal space?

A. Time error
B. Frequency offset
C. Time error & frequency offset
D. None of the mentioned

Explanation: Time error or frequency offset or combination of both will reduce the effective distance between signals in signal space and degrade error performance.

The system which has ______ signal to noise ratio can tolerate larger timing error.

A. Large
B. Small
C. Large & small
D. None of the mentioned

Explanation: The system with increased signal to noise ratio will allow it to tolerate larger timing error so the improvement is error performance is rapid.