Figure 10-3. G.703 Clock Extension Mode 1 - Comtech EF Data CDM-570 Installation And Operation Manual

CDM-570/570L Satellite Modem with Optional IP Module
Clocking Modes
LOCAL END
USER
EQUIPMENT
SD
TT
RD
RT
ST
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 G.703
Rx:
Buffer enabled, clocked from ST
SD
Mod
TT
Rx
Demod
Buffer
Notes:
1) The EIA-530 / v.35 interface can
operate at any data rate, with
1 bps resolution
Any desired
bit rate
2) Tx and Rx bit rates can be
Clock
Synth
asymmetrical
Core
3) Works with multiple distant end
modems (STAR networks)

Figure 10-3. G.703 Clock Extension Mode 1

Timing mode:
Usually loop timing (or Rx-Sat)
Rx buffer disabled
END RESULT:
The G.703 signal at
at , regardless of the link data rate
B
10–8
MN/CDM570L.IOM
DISTANT END
RD
Demod
RT
ST
TT
SD
Clock
Synth
Core
2048 or
1544 KHz
G.703 output (T1/E1)
(all ones pattern)
CDM-570/570L
A
is perfectly reproduced
Revision 12
USER
EQUIPMENT
B
O