Teledyne LeCroy QPHY-BroadR-Reach - Manual (Page 26)

Test 4 - Transmitter Distortion Test
This test measures the peak distortion of the transmitter and checks to see if it is within the specified
limits described in Section 5.4.2. The DUT is required to be placed in test mode 4 for this test.
What is Measured:
The oscilloscope captures ten records with one sample per UI, at ten equally spaced starting phases. The
acquired waveform is then saved and processed by the MATLAB distortion script provided in the
specification.
Disturbing Sine Wave Setup:
This test can be run with or without a disturbing sine wave as defined by the Test Mode 4 – Distortion –
Disturber
variable on the Variable Setup tab. If a disturbing sine wave is used the connection diagram will
prompt you to use the 1000Base-T Template Test section of the TF-ENET-B. This section of the test
fixture allows the DUT to be subjected to the disturbing sine wave, but allows very little of the disturbing
sine wave to reach the oscilloscope.
Figure 19 – Connection Diagram for Transmitter Distortion Test using TF-ENET-B
26 922533 Rev B