Product specifications

CDD-880 Multi Receiver Router Revision 1
Ethernet-based Remote Product Management MN-CDD880
5–21
Individual Demodulator Settings
Theacceptable/validoperatingrangesforitemsinthissectionareprovidedinparentheses.

The upper range of Data and Symbol Rate selection requires activation of the
‘RECEIVEDATARATE’FASToption.
The Web Server Interface polls current operations and populates this  section with the
configured demodulators (i.e., Demod #1 through Demod #12). If a slot is polled as empty or
otherwiseunrecognizable,amessageisdisplayed–e.g.,Dem
od#Xisnotinstalled–inplaceof
aconfigurablerowofparameters.

Duringoperation,someparametersareautomaticallycontrolled–eitherbytheACMalgorithm
or by the VMS– whenexecuting dSCPC switches. During these times, some page functionality
becomesdisabledandaffectedfeaturesdisplayi
nformationonaread‐onlybasis.

Foreach operatingdemodulator,note thefollowing  selections onaper‐columnbasisfrom left
toright:

• Demod # – This is the available "FILLED" demodulator slot (automatically assigned in pairs
pereachinstalleddualdemodulatorcard).

• Demod Enable – Click this option bu
tton to enable the slot. Click [Submit] to execute this
operationalchange.

• RxSymbolRate(16ksps‐4.5Mbps)–Enterthesymbolrate,andthenclick[Submit]tosave.

• RxDataRate(16kbps‐15.350Mbps)–Enterthedatarate,andthen cl
ick[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
appearancesoftheRxDataRateandRxMODCODcolumnschangeasfollows:



• Frequency(950‐2150)–EntertheRxfrequency,inMHz.

• Rx MODCOD – Use the drop‐do
wn menu to select the demodulation type and FEC rate
(MODCOD).Selectionsareasfollows:

o VersaFEC – QPSK 0.488 o VersaFEC – 8-QAM 0.642 o VersaFEC – 16-QAM 0.829
o VersaFEC – QPSK 0.533 o VersaFEC – 8-QAM 0.711 o VersaFEC – 16-QAM 0.853
o VersaFEC – QPSK 0.631 o VersaFEC – 8-QAM 0.780
o VersaFEC – QPSK 0.706 o VersaFEC – 16-QAM 0.731
o VersaFEC – QPSK 0.803 o VersaFEC – 16-QAM 0.780