Comtech EF Data DD240XR Rev Е - Manual (Page 27)

DD240XR High-Speed Digital Demodulator User Interfaces
MN-DD240XR – Rev. E 4-7
The “Auto” Setting of Last Rate Control causes the last
explicitly changed rate (symbol or data) to be maintained
when associated parameters are changed. For
example, if the last rate control is set to “Auto” and the
Data Rate is subsequently explicitly changed, any
subsequent changes to Modulation or Inner FEC Rate
would cause the symbol rate to be adjusted in order to
maintain the Data Rate.
ACQ RANGE:
{Variable in one Hz steps}
Acquisition Range – Allows the user to set the carrier
acquisition sweep range. Sweep rate range changes
based on Data rate and FEC rate.
LNB POWER:
{ON, OFF}
Used to enable the LNB 18V DC Output to J6.
EBNO FLOOR (dB):
{1, 15}
This screen is used for setting the level at which an
Eb/No Alarm should be indicated. This will occur when
the measured Eb/No value is less than the floor level and
an Event and Alarm will be generated.
4.2.3 Interface Menu Options and Parameters
INTERFACE TYPE:
{ASI, Advanced ASI, HSSI, RS-442 Serial, M2P
Parallel, DVB Parallel, G.703 STS1, G.703.E3,
G.703.T3, ECL BAL/UNBAL, ETHERNET GIGE}
Allows the user to enter the Terrestrial Interface type.
Only the Interface types that are installed may be selected.
When a G.703 interface is selected the data rate and symbol rates are dictated by the
interface.