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Figure 4-2. modulator block diagram – Comtech EF Data SNM-1000 User Manual

Page 125

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SNM-1000 Node Control Modem

Revision 3

Theory of Operation

MN/SNM1000.IOM

4–7

INTERFACE

MONITOR

&

CONTROL

CONVOLUTIONAL

ENCODER

DIGITAL

SIGNAL

PROCESSING

BPF

BPF

REFERENCE

LO

SCT

PLL

OPTIONAL

DATA

CLK

SCT

POWER LEVEL

CONTROL

LPF

OUTPUT

RF

RF LOOPBACK

OUTPUT

Figure 4-2. Modulator Block Diagram