Figure 4-3. Modem Provides Clock - Comtech EF Data SLM-7650 Installation And Operation Manual

SLM-7650 Satellite Modem
Theory of Operation
4.4.3.3.2.2 Timing Configuration #2: Modem 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 using the internal modem clock (ST) as the system clock (Figure 4-3).
User clocks
TT and SD
from ST
RT clocks
in the RD
User
ST
TT
TRANSMIT
RT
Clock
Master
Modem

Figure 4-3. Modem Provides Clock

Internal
clock
Receive
Buffer
Modem
4–26
Revision 4
MN/SLM7650.IOM
1, 5, 10,
or 20 MHz
Reference
detect
To TX IF Output
From decoder
User