Specifications

SDM-300L3 Satellite Modem Revision 0
Specifications MN/SDM300L3.IOM
15–23
15.8.4 Performance with Noise Turbo Product Codec (Optional)
Required Eb/No
QPSK BPSK 8PSK
BER 1/2 Rate 3/4 Rate 21/44 Rate 5/16 Rate 3/4 Rate
10
-6 3.0 3.9 2.8 * 7.0
10
-7 3.2 4.1 3.1 * 7.3
10
-8 3.5 4.3 3.3 * 7.6
10
-9
3.8 4.8 3.7 4.0 8.0
* 5/16 BPSK included for compatibility with other equipment but implementation
limitations prohibit optimum performance at low Eb/No. Performance is virtually error
free above 4dB Eb/No. performance below 4.0 dB Eb/No is not guaranteed for 5/16
BPSK.
15.8.5 Performance With Noise, 1544 kbps Sequential Decoder and
Reed Solomon(Optional)
Required Eb/No
BPSK and QPSK
BER 1/2 Rate 3/4 Rate 7/8 Rate
10
-6 4.1 5.6 6.7
10
-7 4.2 5.8 6.9
10
-8 4.4 6.0 7.1
10
-10 5.0 6.3 7.5
Note: OQPSK with Sequential is not available.
15.8.6 Performance With Noise, 56 kbps Sequential Decoder (Optional)
Required Eb/No
BPSK and QPSK
BER 1/2 Rate 3/4 Rate 7/8 Rate
10
-3 4.6 5.5
10
-4 4.1 5.1 6.1
10
-5 4.5 5.5 6.6
10
-6 5.0 5.9 7.3
10
-7 5.4 6.4 7.8
10
-8 5.8 6.8 8.4
Note: OQPSK with Sequential is not available.