Comtech EF Data SDM-2020 - Manual (Page 81)

SDM-2020 Satellite Demodulator Revision 4
Front Panel Operation MN/SDM2020D.IOM
6–17
Function Select: Configuration: Interface: RX Data Fault
RX DATA FAULT
NONE
Receive data fault. Press a directional key to select one of the following modes
NONE The receive interface alarm DATA/AIS is not activated.
AIS (Alarm Indication Signal) Sets receive interface alarm DATA/AIS to monitor an alarm
condition of all 1s in data stream.
DATA STABLE Sets receive interface fault DATA/AIS to monitor an alarm
condition of all 1s or 0s. This is referred to as a data-stable
condition, which means that the data is not transitioning
Upon entry, the current RX Data Fault that is being monitored is displayed. Press [
↑] or
[ ↓] to make the selection. Press to execute the change.
IMPORTANT
Detection of these conditions produces an alarm indication, not a fault.
Function Select: Configuration: Interface: DVB Framing Type
DVB FRAMING TYPE
188
Programs the DVB framing type for 188, 204, or NONE.
IMPORTANT
Pressing in this selection, turns Off RX-IF Output.
The framing type describes the format of the data into the demodulator. The equivalent
serial data rate at the data interface connector is based upon the clock rate of the
incoming data stream. Refer to Section 1.4.2 for information on the different framing
types.
Upon entry, the current status of the DVB framing type is displayed. Press [
↑] or [↓] to
make the selection. Press to execute the change.