beautypg.com

Comtech EF Data OM20 User Manual

Page 156

background image

OM20 Universal Outdoor Modem

Technical Specifications

MN-OM20– Revision 5

8–12

8.13.6 BER Performance (16QAM Viterbi with Reed-Solomon)

1E-9

1E-8

1E-7

1E-6

1E-5

1E-4

1E-3

1E-2

1E-1

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

Eb/No in dB

BE

R

Viterbi Decoder -

Reed Solomon

Specification

3/4 Rate w/RS

Specification

7/8 Rate w/RS

Typical

Performance

16QAM Uncoded Theory

Note: Eb/No values include the effect of using Differential Decoding.

Figure 8-6. OM20 16QAM BER Performance (Viterbi w/R-S)