SCPC vs MCPC | difference between SCPC and MCPC

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This page SCPC vs MCPC describes difference between SCPC and MCPC.It explains basics of SCPC and MCPC and mentions useful difference between terms.

Both of these terms are associated with satellite communication. The full form of SCPC is Single Channel Per Carrier and MCPC is Multiple Channels Per Carrier. In a VSAT system, SCPC is used where-in requirement of number of channels(voice/data) is limited or less and MCPC is used where-in number of channels required is more. The name corresponds to these different channel requirements. Multiplexer is needed to multiplex more channels before they are modulated by the satellite modem and converted to the RF frequency by RF upconverter/power amplifier.

Specifications	SCPC	MCPC
Full form	Single Channel Per Carrier-single voice or data channel is modulated and transmitted over one RF carrier	Multiple Channels Per Carrier-Mlutiple voice and/or data channels are multiplexed(using TDM),modulated and transmitted over one RF carrier
Transmission format	Analog (voice channel) or Digital data (email,image/ text file)	Analog (voice channel) or Digital data (email,image/ text file
Multiplexing	Not provided	FDM or TDM
Modulation technique	FM or PSK(continuous/voice activated), voice activation is provided to save power when there is no voice activity	FM or PSK
Carrier Bandwidth(BW) usage	It can provide one connection and can use full bandwidth of transponder.	It can have multiplexed many connections over single carrier which uses full bandwidth of transponder. It efficiently uses bandwidth of transponder.
Capacity(Per MHz of transponder bandwidth)	more channels	less to medium channels depends on data rate of a system(VSAT)
Application	low data rate VSATs	High data rate VSATs
Burst transmission	Inefficient for such transmission.	Ideal for burst transmission e.g. packet based data transmission.
Dedicated connection	User pays for dedicated connection even if connection is not used. SCPC DAMA implementation avoids this situation.	It does not need dedicated channel for each of the connection.
Further study reference	SCPC basics➤	MCPC basics➤

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SCPC vs MCPC | difference between SCPC and MCPC

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