Operating instructions

DMD50 Universal Satellite Modem Appendix D
TM118 – Rev. 1.1 D-1
Strap Codes
D
D.0 Strap Codes
The Strap Code is a quick set key that sets many of the modem parameters. For quick setup of
the modem, Strap Codes are very helpful. When a Strap Code is entered, the modem is
automatically configured for the code’s corresponding data rate, overhead, code rate, framing,
scrambler type and modulation. An example of how to set a strap code follows:
Example: At the Front Panel <Modulator> Menu, depress ‘↓’, then move ‘→’ to the ‘Strap Code’
Submenu and enter #16. The modem will be automatically configured to the parameters shown
below in the highlighted row ‘Strap Code 16’.
Use the Strap Code Guide (Table D-1) for available strap codes.
Table D-1. Strap Codes
Dis = Disable
Strap Code
(Decimal)
Data Rate (Kbps)
Overhead
Code Rate
Type
Framing Type
Scrambler Type
Drop and Insert
Reed-Solomon
Modulation
Mode
1 64 16/15 1/2 VIT IBS IBS Dis Dis QPSK IBS
2 128 16/15 1/2 VIT IBS IBS Dis Dis QPSK IBS
3 256 16/15 1/2 VIT IBS IBS Dis Dis QPSK IBS
5 384 16/15 1/2 VIT IBS IBS Dis Dis QPSK IBS
6 512 16/15 1/2 VIT IBS IBS Dis Dis QPSK IBS
9 768 16/15 1/2 VIT IBS IBS Dis Dis QPSK IBS
4 1536 16/15 1/2 VIT IBS IBS Dis Dis QPSK IBS
10 1920 16/15 1/2 VIT IBS IBS Dis Dis QPSK IBS
8 2048 16/15 1/2 VIT IBS IBS Dis Dis QPSK IBS
12 2048 16/15 1/2 VIT IBS IBS Dis Dis QPSK CNT
16 1544 96K 3/4 VIT IDR V.35 (IESS) Dis Dis QPSK IDR
32 2048 96K 3/4 VIT IDR V.35 (IESS) Dis Dis QPSK IDR
64 6312 96K 3/4 VIT IDR V.35 (IESS) Dis Dis QPSK IDR
128 8448 96K 3/4 VIT IDR V.35 (IESS) Dis Dis QPSK IDR