Comtech-ef-data SDM-2020 Uživatelský manuál stáhnout pdf (Strana 175)

SDM-2020 Satellite Demodulator Revision 4

G.703 Data Interface MN/SDM2020D.IOM

11–9

11.1.4.7 Receive Data Rate 44.736 Mbps Specifications

Refer to Table 11-8 for data rate specifications.

Table 11-8. RX Data Rate 44.736 Mbps

Parameter Specification

Data Rate

44.736 Mbps, ± 20 ppm

Line Coding B3ZS and AMI at 44.736 Mbps

Pulse Shape Per ITU-T-G.703, Figure 14/G.703

Jitter Characteristics:

Input Jitter

Output Jitter

Complies with ITU-T-G.824, and Table 1/G.824.

Complies ITU-T-G.824 and Figure 1/G.824.

11.1.4.8 Receive Data Rate 51.840 Mbps Specifications

Refer to Table 11-9 for data rate specifications.

Table 11-9. RX Data Rate 51.840 Mbps

Parameter Specification

Data Rate

51.840 Mbps, ± 20 ppm

Line Coding B3ZS and AMI at 51.840 Mbps

Pulse Shape:

Amplitude

Pulse Width

Pulse Mask

± 1.75V (± 10%)

9.64 ns (± 10%)

Per TA-NWT-000253 (STS-1)

Jitter

Characteristics

Input Jitter: Complies with ITU-T-G.824, Table 1/G.824 scaled from

those defined for 44.736 Mbps to apply to 51.840 Mbps.

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Comtech-ef-data SDM-2020 Uživatelský manuál Strana 175