Question

In VSAT network signals are sent from the hub in specific time slots through a method called TDM. TDM stands for ________. 
1. Total Division Multiplication
2. Time Division Multiplication
3. Time Division Multiplexing
4. Time Division Modulation

Answer 1

Correct Answer - Option 3 : Time Division Multiplexing

In VSAT network signals are sent from the hub in specific time slots through a method called TDM. TDM stands for Time Division Multiplexing.

VSAT Network:

• VSAT networks have gained in popularity due to their unlimited geographic reach, efficient transmission and reception of data.
• A satellite network consists of two or more earth stations (VSAT) and satellite re-transmitter (Transponder).
• VSAT stands for “Very Small Aperture Terminal” and its purpose is to transmit and receive satellite transmissions.
• A VSAT comprises a dish antenna, a transceiver (or a combination of BUS and LNB) and a satellite router (modem).
• Receive-only VSAT terminal may not include a transmitter (BUC).
• A VSAT terminal can receive and transmit data, voice and video information and is typically connected to an end user’s equipment via LAN port of the satellite router.
• The router processes an incoming traffic, packetize it and convert into continuous SCPC (Single Channel Per Carrier) or burstable TDMA (Time Division Multiple Access) modulated carrier. 

TDM (Time Division Multiplexing):

• TDM (Time Division Multiplexing) is a multiplexing technique where multiple bit streams are transmitted simultaneously as sub-channels within a single carrier.
• Data transmission in such a channel is separated into fixed time intervals (timeslots) for each sub-channel.