Comtech-ef-data CDM-760 Manual do Utilizador Página 314

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Appendix E Revision 2
CDM-760 Advanced High-Speed Trunking Modem MN-CDM760
E–4
E.3.3 Status Items
Status items are not strictly part of the Statistics but are important items used for
monitoring for current conditions.
E.3.4 BER Testing
Item
Comments
ModCod Selection
Allows selection of ModCod for test.
PN Sequence Test On/Off
Enable / Disable Test.
BER Test Result
Test results continuous. PN data is generated in the Framer (Fig. G-1 Block 6) and recovered in
the Deframer (Fig. G-1 Block 5).
E.3.5 ACM Modulator Status
Item
Comments
Current Tx ModCod
Currently active Tx ModCod.
Remote Es/No Reading
Es/No from distant end.
E.3.6 ACM Demodulator Status
Item
Comments
Rx ModCod
Currently active Rx ModCod.
Local Es/No Reading
Es/No of local demodulator.
E.3.7 CnC Status
Item
Comments
CnC PSD Ratio
Power Spectral Density (PSD) ratio at local end.
PSD = Interferer - Distant, density (dB).
CnC Ratio (Power)
Power Ratio at local end.
CnC Ratio = Interferer - Distant, power (dB).
CnC frequency offset
∆F between Interferer and Distant carriers.
CnC Delay
Round trip delay of Tx carrier in ms (measured in Fig. G-1 Block 8).
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