Comtech EF Data CDM-625 - CONFIG: Clocks  Clk-Ext (G.703 Clock Extension)

CDM-625 Advanced Satellite Modem Revision 13
Front Panel Operation MN-CDM625
5–31
5.2.1.5.3 CONFIG: Clocks  Clk-Ext (G.703 Clock Extension)
Sect. 9.1.1 CLOCK MODES AND DROP & INSERT (D&I).
G.703 Clock Extension:
Mode Interface ()
Use the
◄ ►arrow keys to select Mode or Interface, and then press ENTER.
CONFIG: Clocks  Clk-Ext  Mode
G.703 Clock Extension Mode: RxEnable
(None, TxLock, RxEnable) ()
Use the
▲▼ arrow keys to select None, TxLock, or RxEnable, and then press ENTER. Note the
following:
Selection
Function
None
All G.703 Clock extension modes are disabled.
TxLock
The CDM-625 (operating in a non-G.703 mode) locks its transmit clock timing to an externally
presented G.703 reference signal.
RxEnable
The CDM-625 (operating in a non-G.703 mode) synthesizes a G.703 timing reference from the
Rx satellite signal, regardless of its actual data rate.
CONFIG: Clocks  Clk-Ext  Interface
G.703 Clock Extension:
Interface: T1 (T1, E1-B, E1-U) ()
When selecting TxLock as the mode, the transmit timing of the CDM-625 locks to the timing
presented of the interface type selected here.
When selecting RxEnable as the mode, the CDM-625 generates a timing signal of the interface
type selected here.
The two interface types do not need to be the same for a particular link. For
example, if it is required to generate an E1 reference signal at the remote site, but
at the local end only a T1 reference signal is available, this is supported.