Comtech EF Data SLM-5650A - Manual (Page 347)

SLM-5650A Satellite Modem Revision 8
Appendix B
B–13
B.3.2 IDR/IBS G.703 Master/Slave
Use this application when the far end earth station does not have local access to a high stability
reference clock, or when it is not required to synchronize with a local clock. Refer to Figure B-2 for:
• Clocking block diagram
• TX clock options
• Buffer clock options for using external loop timing
Modem loop timing does not apply for G.703 operation. The terrestrial equipment must select loop
timing to recover the clock off the RX data and use that recovered clock for the TX data.