Siglent FX-ETH Ethernet Test Fixture

Figure 1 Ethernet Electrical Compliance Test Fixture Board

Every section on the board is described as follows:

Section 0: Return loss calibration section. The vector network analyser can be calibrated for Open, Short, and Load when DUT runs return loss tests.

Section 1: Supports most of the Ethernet Compliance tests for 100 BASE-TX and 1000 BASE-T by using a differential probe.

Section 2: Differential to single-ended signal conversion by using a balun, which supports return loss tests by using one Port on the VNA.

Section 3: Supports for 1000 BASE-T MDI common-mode output voltage tests.

Section 4: Supports Test Mode 1 and Test Mode 4 on 1000BASE-T compliance tests with disturbing signals.

Section 5: Under 100 BASE-TX compliance tests, the Link Partner such as the SDS7000A oscilloscope transmits at 100Mbps. The DUT transmitter should then emit the following waveform to support the compliance tests.

Section 6: Supports most of the Ethernet Compliance tests for 100 BASE-TX and 1000 BASE-T by using two SMA cables.

Section 7: Supports 1000 BASE-T jitter tests.

Section 8: Jumper storage section, which can store 12 jumpers.

Section 9: Under 100 BASE-TX compliance tests, the Link Partner such as the SDS7000A oscilloscope transmits at 100Mbps. The DUT transmitter should then emit the following waveform to support the compliance tests. Compare to Section 5, The TX and RX signals on the Ethernet Connectors of Section 9 are swapped, which will support some specific application for 100 BASE-TX compliance tests.