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208 APPENDIX B: Repeater Specifications
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Table 15: AUI Interface (IEEE 802.3 Compliant)
Parameter Typical Range
Signalling Rate 10 Mb/s 5 to 10 Mb/s
DO Output Voltage 900 mV 62 to 1100 mV
DO Common Mode 2.5 V 520
Output Voltage Threshold Level 160 to 275 mV
AUI Cable Length 50 m
Table 16: UTP Interface (IEEE 802.2 10Base-T Compliant)
Parameter Typical Range
Transmitter
Peak Differential Signal Amp. 2.5 V 2.2 to 2.8 V
Transmitter Jitter 3.5 ns
Harmonics Content >27 dB below fund.
Common Mode Output Voltage <50 mV
Silence Voltage 0 40 mV
Link Test Pulse 100 ns 60 to 130 ns
Output Impedance 80 Ohm
UTP Length 100 m
Receiver
Receiver Threshold -400 mV -300 to -520 mV
Input Impedance 10 kOhm