Standard Ibs Mode - Comtech EF Data DMD-2050E Installation And Operation Manual

DMD2050E Universal Satellite Modem
3.16

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 3-6.
Bit 1 ES to ES Data Channel
Bit 2 Frame Alignment
Bit 3 Backward Alarm
Bit 4 Multiframe Message
Bits 5 Spare
and 6
Bits 7 Encryption Utilization
and 8
MN-DMD2050E Revision 2
Standard IBS
Kbps
Baud Rate Example
Table 3-6. Bits of Overhead Housekeeping Byte 32
This bit is routed directly to the ES to ES Data Channel. Its data rate is 1/512th
of the aggregate rate (or 1/480th of 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.
As per IBS.
Not currently utilized.
Not currently utilized.
Enhanced Mode
Kbps
Baud Rate Example
896 19200
960 19200
1024 19200
1088 19200
1152 19200
1216 19200
1280 19200
1344 19200
1408 19200
1472 19200
1536 19200
1600 19200
1664 19200
1728 19200
1792 19200
1856 19200
1920 19200
1984 19200
2048 19200
Theory of Operation
3–60