Reach PoE5 Tester Manual 1.8 03/25/2021 Page 14
5.3. Signature, class, and load
One of these blocks per pair:
The IEEE 802.3bt controller (also known as the PD PoE controller) used is the TI
TPS2372.
The signature resistor options are nominal, or invalid (too low). This is enough to validate
the PSE’s ability to detect the physical IEEE signature. A legacy capacitive load can be
applied, which should cause the signature detect to fail. This can also be used to simulate
an AC load for AC disconnect testing. The classification (Class) loads are standard. The
"power-good" status of the IEEE controller goes active once the load capacitor (not
shown) is charged and can be monitored via the “status” command. This command
reports the status of each of the two PoE PD controllers. This will indicate which pairs
are powered.
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