Table 1-2. Ber Performance Specification - Comtech EF Data SDM-100A Installation And Operation Manual

SDM-100A Satellite Modem
1.5 BER Performance
The bit energy-to-noise ratio (E
in Table 1-2.

Table 1-2. BER Performance Specification

The Bit Error Rate (BER) performance of the modem with a Viterbi decoder is shown in
Figure 1-4.
The BER performance of the modem with a sequential decoder is shown in Figure 1-5.
A typical output spectrum of the modem is shown in Figure 1-6.
Notes:
1. The modem alone, without coding, provides operation within 0.5 dB of
2. Performance measurements are made with Transmit and Receive IF connected
3. The BER performance is in accordance with IESS-308 specifications.
Rev. 0
Viterbi K = 7
BER 1/2 Rate 3/4 Rate
10 5.5 dB 6.8 dB
-5
10 6.7 dB 8.3 dB
-7
theoretical for BPSK, and within 0.8 dB for QPSK, for BERs in the range 10
10 .
-6
back-to-back through an additive white Gaussian noise channel.
/N ) required to achieve 10
b 0
7/8 Rate
8.1 dB
9.4 dB
Introduction
to 10 bit error rates is listed
-5 -7
to
-1
1–7