Comtech EF Data CDM-600/600L User Manual
Page 188

CDM-600/600L Open Network Satellite Modem
Revision 3
Appendix B
MN/CDM600L.IOM
B–2
Example: In the diagram that follows, the (Co+No)/No measured is 4.6 dB. If Rate 1/2 QPSK is
being used, this would correspond to an Eb/No of approximately 2.6 dB.
The exact relationship used to derive the table values is as follows:
E
b
/N
0
= 10 log
10
(10
(Co+No/No )/10)
-1) - 10 log
10
(FEC Code Rate) - 10 log
10
(bits/symbol)
where:
• E
b
/N
0
and (Co+No)/No are expressed in dB
• Bits/symbol = 1 for BPSK
• Bits/symbol = 2 for QPSK
• Bits/symbol = 3 for 8-PSK/8-QAM
• Bits/symbol = 4 for 16-QAM
• Code Rate for ‘uncoded’ = 1
• Pay close attention to the sign of the middle term
See also other documents in the category Comtech EF Data Equipment:
- CDD-880 (124 pages)
- CDM-800 (130 pages)
- ODMR-840 (184 pages)
- CDM-750 (302 pages)
- CDM-840 (244 pages)
- SLM-5650A (420 pages)
- CTOG-250 (236 pages)
- CDM-700 (256 pages)
- CDM-760 (416 pages)
- CDM-710G (246 pages)
- CDMR-570L (512 pages)
- CDM-625 (684 pages)
- CDM-625A (756 pages)
- CDD-564A (240 pages)
- CDD-564L (254 pages)
- CLO-10 (134 pages)
- MCED-100 (96 pages)
- CDMR-570AL (618 pages)
- CDM-600 LDPC (2 pages)
- BUC Power Supply Ground Cable (2 pages)
- MPP70 Hardware Kit for CDM-570L (4 pages)
- MPP50 Hardware Kit for CDM-570L (4 pages)
- CDM-625 DC-AC Conversion (4 pages)
- CDM-625 DC-AC Conversion with IP Packet Processor (4 pages)
- DMDVR20 LBST Rev 1.1 (117 pages)
- DMD-2050 (342 pages)
- DMD2050E (212 pages)
- DMD1050 (188 pages)
- OM20 (220 pages)
- QAM256 (87 pages)
- DD240XR Rev Е (121 pages)
- MM200 ASI Field (5 pages)
- DM240-DVB (196 pages)
- MM200 (192 pages)
- CRS-150 (78 pages)
- CRS-280L (64 pages)
- CRS-170A (172 pages)
- CRS-180 (136 pages)
- SMS-301 (124 pages)
- CiM-25/8000 (186 pages)
- CiM-25 (26 pages)
- CRS-500 (218 pages)
- CRS-311 (196 pages)
- CIC-20 LVDS to HSSI (26 pages)