Comtech EF Data CDM-570 - Manual (Page 199)

CDM-570/570L Satellite Modem with Optional IP Module Revision 12
Clocking Modes MN/CDM570L.IOM
10–9
USER
EQUIPMENT
Notes:
1) The modems can be set to any
desired data rate, with 1 bps
resolution
2) Asymmetrical loop timing
supported at distant end
LOCAL END DISTANT END
* TT assumed to be
derived from a high
stability source
EIA-530 / v.3
5
Inte
rfa
c
e
SD
RD
RT
TT*
CDM-570/570L
Tx timing mode:
External clock
Rx timing:
Not important
USER
EQUIPMENT
G.703 output (T1/E1)
(all ones pattern)
EIA-530 /
v.35
Inte
rface
RT
SD
ST*
RD
CDM-570/570L
Clock
Synth
Core
Demod RT
G.703
Po
rt
2048 or
1544 KHz
O
Timing mode:
Usually loop timing (or Rx-Sat)
TT
END RESULT:
The G.703 signal at is generated with
the same accuracy as TT at the local end
A
A
*ST optional
Figure 10-4. G.703 Clock Extension Mode 2