1000BASE-T/100BASE-TX/10BASE-T Physical Layer Compliance Tests Manual
Intel Confidential 31
100BASE-TX Differential Output Voltage (UTP)
8 100BASE-TX Differential Output
Voltage (UTP)
ANSI Section 9.1.2.2
8.1 Test Purpose
To measure the peak differential output voltage, V
OUT
, at the transmit pins of the UTP connector
(also known as the Active Output Interface or AOI).
8.2 Specification
“For UTP, the differential output voltage, V
OUT
, as defined in specification 9.1.3 and [Figure 8-1]
shall be: 950 mV ≤ V
OUT
≤ 1050 mV.”
1
Figure 8-1. Waveform at Active Output Interface
2
8.3 Test Equipment
•
Oscilloscope with at least 1 GHz bandwidth
•
Differential probe with at least 1 GHz bandwidth and capacitance less than or equal to 1 pF
•
Host computer running gigconf.exe
1. ANSI X3.263-1995, p 28.
2. Based on ANSI X3.263-1995, p 29, figure 12.
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