Comtech EF Data DM240XR User Manual
Page 30
DM240XR High-Speed Digital Modulator
User Interfaces
MN-DM240XR– Revision 13
4–8
GOLD SEQ N:
{0 - 262142}
Gold code sequence index. Displayed only in DVB-S2.
LAST RATE CTRL:
{SYMBOL RATE, DATA RATE, AUTO}
Indicates the rate (symbol or data) that is maintained when
associated parameters (i.e. Modulation, Inner FEC Code Rate,
Terr Framing) are changed. For example, if the Last Rate
Control is set to “Symbol Rate” and the modulation is
subsequently changed, the system will attempt to maintain the
same symbol rate by adjusting the data rate. If the Last Rate
Control is set to “Data Rate” and the modulation is subsequently
changed, the system will attempt to maintain the same data rate
by adjusting the symbol rate.
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.
EQ ENABLE:
{Enable, Disable}
Allows the DM240XR Modulator to implement the AutoEQ™
coefficient values as specified by the EQ Select.
EQ SELECT:
None, User Specified Name}
Allows the DM240XR Modulator to select the stored AutoEQ™
coefficient file to be implemented. Up to 32 User Nameable
storage locations are available.
RXIF:
{950 – 2050 MHz}
Sets the receive input center frequency for the AutoEQ™
Interface Card. This programmed frequency must be within + 25
kHz of the actual desired system downlink center frequency to
insure proper acquisition.
MSE:
{Value}
Displays the Mean Squared Error (MSE) value of the equalizer.
A value of 1 E-5 or less indicates a successful calibration run
with acceptable coefficients for operation over the satellite.
EQ CAL:
{Normal, Calibrating, Ref ACQ}
Allows the DM240XR Modulator to select the AutoEQ™
interface mode of operation.
Normal:When in this state, the AutoEQ™ is in monitoring
mode, with no Calibration or Reference Acquisition functions
being preformed.
Calibrating: When in this state, the AutoEQ™ will program the
DM240XR modulated output for the AutoEQ™ calibration