Comtech EF Data CDM-840, Инструкция по установке и эксплуатации, Страница: 63 / 110

CDM-840 Remote Router Revision 0
Ethernet Management MN-CDM840
5–17
5.4.4.4.3 Configuration | Mod
Figure 5-11. Configuration| Mod page
The ‘ Configuration | Mod’ page ( Figure 5-11 ) permits the user to configure CDM-840 Tx
modulator operations. Note that, for any configuration item requiring text entry, a reference to the
operational ranges for that text box is provided to the right of that text box.
Modulator
The acceptable/valid operating range for each item in this section is provided in brackets.
Data Rate [16 – 15343 kbps] – Enter the router’s Tx Data Rate in kbps.
Once the desired Tx Data Rate has been set, click [Submit] as needed to save this change.
Symbol Rate [16 – 4500 ksps] – Enter the router’s Tx Symbol Rate in ksps.
Once the desired Tx Symbol Rate has been set, click [Submit] as needed to save this change.
FEC Type – Presently, VersaFEC is the sole available FEC type.
Tx Frequency [950 – 2150 MHz ] – Enter the router’s Tx frequency in MHz.
MODCOD – Use the drop-down menu to select the Modulation type and FEC rate ( MODCOD) .
Selections are as follows:
• VersaFEC MODCOD 0 – BPSK 0.488 • VersaFEC MODCOD 6 – 8-QAM 0.711
•
VersaFEC MODCOD 1 – QPSK 0.533
•
VersaFEC MODCOD 7 – 8-QAM 0.780