Comtech EF Data SDM-2020 - Manual (Page 141)

SDM-2020 Satellite Modulator Revision 7
Data Interfaces MN/SDM2020M.IOM
11-6
11.1.3.1 T
RANSMIT
S
PECIFICATIONS
• TX Data Rate 1.544 Mbps • TX Data Rate 2.048 Mbps
• TX Data Rate 6.312 Mbps • TX Data Rate 8.448 Mbps
• TX Data Rate 32.064 Mbps • TX Data Rate 34.368 Mbps
• TX Data Rate 44.736 Mbps • TX Data Rate 51.840 Mbps
11.1.3.2 T
RANSMIT
D
ATA
R
ATE
6.312 M
BPS
Parameter Requirements
Data Rate The input bit rate is 6.312 Mbps ± 30 ppm.
Line Coding The line code can be selected between B8ZS and AMI for data rate
6.312 Mbps.
Pulse Shape Nominal pulse shape is rectangular and must meet the pulse mask per
ITU-T-G.703, Figure 12/G.703.
Jitter Characteristics Input Jitter: The unit tolerates input jitter levels specified in ITU-T-G.824,
Figure 3/G.824, and Table 2/G.824.
11.1.3.3 T
RANSMIT
D
ATA
R
ATE
8.448 M
BPS
Parameter Requirements
Data Rate The input bit rate is 8.448 Mbps ± 30 ppm.
Line Coding The line code can be selected between HDB3 and AMI for data rate
8.448 Mbps.
Pulse Shape Nominal pulse shape is rectangular with a pulse rate of 59 ns. All marks of valid
signal level must meet the pulse mask per ITU-T-G.703, Figure 16.703.
Jitter Characteristics Input Jitter: The unit tolerates input jitter levels specified in ITU-T-G.824,
Figure 3/G.823, and Table 2/G.823.
11.1.3.4 T
RANSMIT
D
ATA
R
ATE
32.064 M
BPS
Parameter Requirements
Data Rate The input bit rate is 32.064 Mbps ± 10 ppm.
Line Coding The line code can be selected between HDB3 and AMI for data rate
32.064 Mbps.
Pulse Shape The pulse shape falls within the mask of ITU-T_G.703, Figure 13/G.703.
Jitter Characteristics Input Jitter: The unit tolerates input jitter levels specified in ITU-T-G.824,
Figure 3/G.824, and Table 2/G.824.