Mn/Cdm570L.iom - Comtech EF Data CDM-570L Installation And Operation Manual

CDM-570L Satellite Modem with IP Module
The sub-branches available are:
Rx:FEC Dem Code Data Frq
Acq Descram Buf Inv EbNo
Select FEC, Dem, Code, Data, Frq, Acq, Descram, Buf, Inv or EbNo using the ◄ ►
arrow keys, then press ENTER. The user will then be taken to a further sub-menu. Each
of these choices is described briefly in the table below:
FEC
Dem
Code
Data
Acq
On/Off
Descram
Buf
Inv
EbNo
(Forward Error Correction) This sub-menu permits the user to select the
method of FEC used for reception (Viterbi, TPC, etc.). FEC type takes the
highest configuration priority.
(Demodulation) This sub-menu permits the user to select the modulation
type used for reception (BPSK, QPSK, 8-PSK, etc.). The choice of
demodulation will depend on the FEC type chosen.
(FEC Code Rate) This sub-menu permits the user to select the FEC Code
Rate used for reception (Rate 1/2, Rate 3/4, etc.). The choice of Code Rate
will depend on both the FEC type and Demodulation selected.
(Data Rate) This sub-menu permits the user to select the receive data rate,
in steps of 1 bps. The choice of data rate will depend on the FEC type,
Demodulation, and Code Rate selected.
(Acquisition) This sub-menu permits the user to determine the amount of
frequency uncertainty the demodulator will search over in order to find
and lock to an incoming carrier.
This sub-menu permits the user to control the output state of the transmit
carrier.
(Descrambler) This sub-menu permits the user to select whether or not
data descrambling is used.
(Buffer) This sub-menu permits the user to select whether or not the
Plesiochronous/Doppler buffer is used, and if so, the size of that buffer.
(Inversion) This sub-menu permits the user to invert the sense of the
received spectrum, or to invert the sense of the received baseband data.
(Eb/No Alarm threshold) This sub-menu permits the user to determine the
Eb/No alarm threshold.
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MN/CDM570L.IOM