Standard Ibs Mode - Comtech EF Data DMD50 Installation And Operation Manual

DMD50 Universal Satellite Modem
Kbps
896
1024
1152
1280
1408
1536
1664
1792
1920
1920
2048

3.11 Standard IBS Mode

In the first or "Normal" mode, all bit assignments are per the IBS standard. The bits of Overhead
Housekeeping byte 32 are implemented as shown in Table 3-3 below:
Bit 1 ES to ES Data
Channel
Frame Alignment
Bit 2
Backward Alarm
Bit 3
MN-DMD50– Revision 3
Baud Rate Example for
Standard IBS
448
512
576
640
704
768
832
896
960
960
1024
Table 3-3. Bits of Overhead Housekeeping
This bit is routed directly to the ES to ES Data Channel.
Its data rate is 1/512
the through terrestrial data rate), and is normally used to
super-sample an asynchronous data channel.
Part of the Frame Alignment word.
Transmit and Receive with main processor to activate
Main Alarm/LED.
Baud Rate Example for
Kbps
Enhanced Mode
256
320
384
448
512
576
640
704
768
768
832
896
960
1024
1088
1152
1216
1280
1344
1408
1472
1536
1600
1664
1728
1792
1856
1920
1984
2048
th
of the aggregate rate (or 1/480
Theory of Operation
4800
9600
9600
9600
9600
9600
19200
19200
19200
19200
19200
19200
19200
19200
19200
19200
19200
19200
19200
19200
19200
19200
19200
19200
19200
19200
19200
19200
19200
19200
th
of
3–18