Figure 4-2. User Provides Clock - Comtech EF Data SLM-7650 Installation And Operation Manual

SLM-7650 Satellite Modem
Theory of Operation
4.4.3.3.2.1 Timing Configuration #1: User Provides Clock
Modem Reference clock is either INT, 1, 5, 10, or 20 MHz
TX clock source = TX Terrestrial
Buffer clock also is using TX Terrestrial
This user is ignoring the internal modem clock and providing timing to the modem
(Figure 4-2).
User
provides the
clock for
TT and SD
RT clocks
in the RD
Clock
Master
User
ST
TT
TRANSMIT
RT
Modem

Figure 4-2. User Provides Clock

Internal
clock
Receive
Buffer
Modem
4–25
Revision 4
MN/SLM7650.IOM
1, 5, 10,
or 20 MHz
Reference
detect
To TX IF Output
From decoder
User