Comtech EF Data SDM-9000 - Manual (Page 148)

Theory of Operation SDM-9000 Satellite Modem
5–20 Rev. 4
5.5.2.1 G.703
G.703
Data Rate 8.448 Mbit/s
32.064 Mbit/s
34.368 Mbit/s
44.736 Mbit/s
51.840 Mbit/s
External Clock Range 1.544 to 20.0 MHz, in 8 kHz steps, or at the
receive data rate
External Clock Input 0.5 to 5.0V P-P
Sine wave or square wave
Duty cycle 50%,
±
10%
75 Ω impedance
5.5.2.2 ECL
ECL
Data Rate 6.0 to 52.0 Mbit/s, in 1 bit/s steps
External Clock Range 1.544 to 20.0 MHz, in 8 kHz steps, or at the
receive data rate
External Clock Input Standard ECL levels
Duty cycle 50%,
±
10%
100 Ω impedance
5.5.2.3 MIL-STD-188
MIL-STD-188
Data Rate 6.0 to 13.0 Mbit/s, in 1 bit/s steps
External Clock Range 1.544 to 13.0 MHz, in 8 kHz steps, or at the
receive data rate
External Clock Input 4V,
±
2V differential
Duty cycle 50%,
±
10%
100 Ω impedance