Comtech EF Data CDM-840 - Manual (Page 101)

CDM-840 Remote Router Revision 2
Ethernet-based Remote Product Management MN-CDM840
6–33
Modulator
The acceptable/valid operating range for each item in this section is provided in parentheses.
• Data Rate (16 to 15343 kbps) – Enter The CDM-840 Tx Data Rate in kbps. Click [Submit] to
save.
When Adaptive Coding and Modulation (ACM) is set to Enable, the Data Rate
is set automatically (manual configuration of Data Rate is disabled), and the
appearance of the Data Rate section changes as follows:
• Symbol Rate (16 to 4500) – Enter The CDM-840 Tx Symbol Rate in ksps. Click [Submit] to
save.
• FEC Type – At present, VersaFEC is the sole available FEC type.
• Tx Frequency (950 to 2150 MHz) – Enter The CDM-840 Tx frequency in MHz.
• MODCOD (applicable only to CCM Mode) – Use the drop-down list to select the Modulation
type and FEC rate (MODCOD). The available selections are:
o VersaFEC MODCOD 0 – BPSK 0.488 o VersaFEC MODCOD 6 – 8-QAM 0.711
o VersaFEC MODCOD 1 – QPSK 0.533 o VersaFEC MODCOD 7 – 8-QAM 0.780
o VersaFEC MODCOD 2 – QPSK 0.631 o VersaFEC MODCOD 8 – 16-QAM 0.731
o VersaFEC MODCOD 3 – QPSK 0.706 o VersaFEC MODCOD 9 – 16-QAM 0.780
o VersaFEC MODCOD 4 – QPSK 0.803 o VersaFEC MODCOD 10 – 16-QAM 0.829
o VersaFEC MODCOD 5 – 8-QAM 0.642 o VersaFEC MODCOD 11 – 16-QAM 0.853
The upper range of Data and Symbol Rate selection requires activation of the
TRANSMIT DATA RATE FAST option.