1000BASE-T Alien Crosstalk Noise Rejection
1000BASE-T/100BASE-TX/10BASE-T Physical Layer Compliance Tests Manual
22 Intel Confidential
2. Connect the equipment as shown in the figure below.
3. Adjust the 100BASE-TX unit to send scrambled idles onto one channel of the UUT. Verify the
injected signal is nominally 25mV pk-pk.
4. Verify Scrambled Idle Amplitude & record. Note: Signal amplitude may vary across various
units.
5. Use the UUT and the 1000BASE-T unit to perform a BER test using the maximum cable
length according to the procedure defined in Section 4.
6. Perform a warm reboot of the UUT after the test is complete.
7. Move the 100BASE-TX unit to send scrambled idles on to another channel of the UUT.
8. Repeat steps 5 to 7 for each remaining channel. Four sets of receive BER data should exist
when the test is completed.
9. Verify the measurements meet specifications
Note: Before injecting the differential 100BASE-TX scrambled idles, a baseline receive BER test should
be performed. Without the injected noise signal, the receive BER should equal 0 (zero).
Unit Under Test
(UUT)
RJ-45
1000Base-T
Transmission Unit
RJ-45
100Base-TX Unit
Transmitting
Scrambled Idles
RJ-45
Worst Case, Max Spec Cable
(Maximum Insertion Loss and Maximum Propagation Delay)
(NOT Worst Case Jitter Cable 40.6.1.1.1)
Fixture
40.6.1.1.1.A
Coupler
Fixture
40-28B
Fixture
40-28A
Table 5-1. Example Data
MDI
Channel
Frame
Size
(bytes)
Transmit
Good Frames
Receive
Good Frames
Total Receive
Errors
BER
A 1024 6,513,468 6,509,797 0 0
B 1024 6,337,425 6,334,005 0 0
C 1024 7,691,347 7,687,308 0 0
D 1024 6,382,373 6,378,962 0 0
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