Mocomtech CIM-550 manual 113

CiM-550 IP Enabled Satellite Modem										Rev. 2
Theory of Operation										CD/CIM550.IOM
			BUFFER DISABLE CLOCK MODE
RX DATA						DATA FROM FEC
				RX
				BUFFER	DECODER/DEFRAMER
RX CLOCK		RECEIVE
	(RT)	DATA
		INTERFACE
				DIRECT		CLOCK		PLL
				DIGITAL
							VCXO	CIRCUIT	RX SYMBOL
				SNTHESIZER
									CLOCK FROM
									DEMOD
				BUFFER ENABLE
				TX=RX CLOCK MODE
RX DATA						DATA FROM FEC
		RECEIVE		RX
				BUFFER	DECODER/DEFRAMER
		DATA
RX CLOCK		INTERFACE
	(RT)
					DATA TO
					MODULATOR
					CIRCUIT
TX CLOCK		TRANSMIT
				TX		PLL		CLOCK
	(TT)
		DATA		FIFO	CIRCUIT			VCXO
		INTERFACE

				BUFFER ENABLE
			TX<>RX CLOCK MODE
RX DATA						DATA FROM FEC
			RX
			BUFFER		DECODER/DEFRAMER
RX CLOCK		RECEIVE
	(RT)	DATA
		INTERFACE
			DIRECT			CLOCK	PLL
			DIGITAL
						VCXO	CIRCUIT
			SNTHESIZER

TX CLOCK

(TT) TRANSMITTX

DATAFIFO

INTERFACE

Figure 6-2. RX Clock Modes

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