Comtech EF Data CDM-710G, Installation And Operation Manual

Page: 169 / 246

CDM-710G High-Speed Satellite Modem Revision 1
Forward Error Correction Options MN-CDM710G
11–9
11.3 End-to-End Processing Delay (Latency)
For DVB-S2 operation with the Gigabit Ethernet and HSSI Data Interfaces, the effects of delay
through the modulator and demodulator are more problematic at low data rates and generally
negligible at higher data rates.
Delay for the Gigabit Ethernet and HSSI interfaces is shown in Figure 11-5 and Figure 11-6 with
the Rx Buffer (HSSI) at minimum. In packet networks, minimum Rx Buffer is the normal setting.
Expected performance for the G.703 interface is similar to HSSI.
Figure 11-5. CDM-710G Gigabit Ethernet Latency With Modem In IF Loopback