Teledyne-lecroy QPHY-ENET Manuel d'utilisateur télécharger pdf (Page 24)

QPHY-ENET Operator’s Manual Rev G

10Base-T Tests

The required tests for the 10Base-T signal type are pulse mask, voltage level, and jitter. The requirements are

given in the IEEE 802.3-2005 standard (clause 14). The mask test requires the use of a “Twisted Pair Model,”

which effectively is a low-pass filter modeling the effect of transmitting the signal over a standard CAT5 cable.

This Twisted Pair Model is available in section A of TF-ENET-B from LeCroy.

Please refer to the test list in the 10 Base-T IEEE 802.3-2005 section of this manual.

Run the full set of 10Base-T tests by choosing the 10BASE-T All tests configuration in QualiPHY.

If the test needs to be done manually, use the following procedure:

1. From the menu bar, select Analysis  Ethernet Tests

2. Touch the 10Base-T button on the left side of the menu to select the 10Base-T test mode.

The TF-ENET-B fixture allows for connecting each wire in the pair to a separate channel. Use the fixture section A

in the TF-ENET-B fixture set (

Figure 13

, as follows) to probe the signal using two channels. The test loads are

embedded in TF-ENET-B Fixture. Installing and removing Jumpers allows you to change test loads. (

Table 2

The 10Base-T transmitter is tested at the output of the Media Access Unit (MAU). This connection is made using

an RJ45 twisted pair connector. The MAU can be internal or external to the transmitter; and there are different

requirements for each type of MAU. The ENET software provides separate masks for each type of MAU to

accommodate these different requirements.

The 10Base-T test area of the TF-ENET-B also allows for devices to be tested using a link partner. See the Link

Partner Testing for 10Base-T & 100Base-TX section of this manual for more details.

Figure 13. Section A 10Base-T test area Table 2. 10Base-T section A jumper setting

Mode Install Jumper Remove Jumper

With TPM J1, J6, J14, J16 J7, J8, J9, J10

Without TPM J7, J8, J9, J10 J1, J6, J14, J16

100 Ω J24, J25 J20, J21, J22, J23

LOAD 1 J20, J21 J22, J23, J24, J25

LOAD 2 J22, J23 J20, J21, J24, J25

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 77 78

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Teledyne-lecroy QPHY-ENET Manuel d'utilisateur Page 24