Figure 10-5. G.703 Clock Extension Mode 3 - Comtech EF Data CDM-570 Installation And Operation Manual

CDM-570/570L Satellite Modem with Optional IP Module
Clocking Modes
LOCAL END
ETHERNET
A
O
2048 or
1544 KHz
G.703 input (T1/E1)
CDM-570/570L
from high stability
network source
Tx timing mode:
Internal clock, locked to
external G.703
Rx:
Buffer disabled
CLK
Demod
DATA
(HDLC)
DATA
Mod
CLK
Notes:
Any desired
1) The IP interface can be set to
data rate
any desired data rate, with 1 bps
resolution
Clock
Synth
Core
2) Tx and Rx rates can be
asymmetrical

Figure 10-5. G.703 Clock Extension Mode 3

Rx clock at desired link data rate
Timing mode:
Rx buffer disabled
END RESULT:
The G.703 signal at
at , regardless of the exact link data rate
B
10–10
MN/CDM570L.IOM
DISTANT END
Mod
ETHERNET
(HDLC)
RD
Demod
RT
Clock
Synth
Core
2048 or
1544 KHz
G.703 output (T1/E1)
(all ones pattern)
CDM-570/570L
A
is perfectly reproduced
Revision 12
B
O