The following list is not exhaustive, but these items are all useful. Not all equipment is required for every debug:

• DC power supplies
• Electronic load
• Oscilloscope with four channels and probes
• Current probe
• Differential probe
• Resistive load
• Digital multimeters (as many as your bench holds)
• Ethernet cable – standard Cat 5
• Ethernet cable – split open, banana female connectors soldered to twisted pair sets such that a DC power supply can power through these twisted pairs
• Grabber to banana wires
• IEEE802.3 certified Power Sourcing Equipment (PSE) – TPS23881 EVM recommended
• Bode box or equivalent for gain or phase measurement loop response
• Sifos? PDA-602 analyzer