User Manual

Chapter 1 - System Description Specifications
4Motion 31 System Manual
1.5.4 AU - ODU Communication
1.5.5 Data Communication (Ethernet Interfaces)
Table 1-11: AU - ODU Communication
Item Description
IF Frequency
 Tx: 240 MHz
 Rx: 140 MHz
Ref Synchronization Frequency 64 MHz
Bi-Directional Control Frequency 14 MHz
IF cable Impedance 50 Ohm
Maximum IF cable Attenuation 10 dB @ 240 MHz
7.5 dB @ 140 MHz
8 dB @ 64 MHz
Minimum IF cable Shielding Effectiveness 90 dB in the 10-300 MHz band
Maximum IF cable Return Loss 20 dB in the 10-300 MHz band
Maximum IF cable DC Resistance 1x1 ODUs, 2.x GHz 4x2 ODUs: 1.5 Ohm
3.x GHz 4x2 ODUs: 1 Ohm
Table 1-12: Data Communication (Ethernet Interfaces)
Item Description
Standard Compliance IEEE 802.3 CSMA/CD
Speed NPU Data Port 100/1000 Mbps, Full Duplex with Auto Negotiation
NPU Management Port 10/100 Mbps, Half/Full Duplex with Auto Negotiation
NPU Cascade Port 100/1000 Mbps, Full Duplex with Auto Negotiation
AU Calibration Port 10/100 Mbps, Half/Full Duplex with Auto Negotiation