1. The purpose of a transmission system is to provide a ------------- between two distant points or nodes.
(A) Space
(B) link
(C) call
(D) Internet
2. In ------------ modulation the input signal directly varies the frequency of the carrier.
(A) Amplitude
(B) Pulse
(C) Phase
(D) Frequency
3. In -------------- the output signal steps between two or more phases in response to the binary modulating signal.
(A) PCM
(B) PSK
(C) FSK
(D) PPM
4. Loss of power, due to the absorption, scattering and reflections of the signal within the transmission medium, is known as --------------.
(A) Noise
(B) Phase Distortion
(C) Attenuation
(D) a & b
5. In -------------- propagation through the air, the radio signal follows a straight line of sight between antennas.
(A) Sky waves
(B) Surface Waves
(C) free space
(D) Ground Reflected Waves
6. The cost per circuit carried ---------- as the capacity of the transmission system increases.
(A) Increased
(B) Same
(C) Reduces
(D) Equal
7. The time frame length of a PCM frame is ------------- ms
(A) 115
(B) 123
(C) 125
(D) 120
8. To indicate the start of the TDM frame the ----------- is used.
(A) AAK
(B) PSK
(C) PPS
(D) FAS
9. The tributaries are packed into a basic container, which is known as the --------- in SDH.
(A) STM
(B) E1
(C) T1
(D) ATM
10. -------- is broadband version that uses ATM over the PON system to provide broadband service.
(A) GPON
(B) EPON
(C) APON
(D) ATM