Short GI for 20 MHz

A 400 ns guard interval instead of 800 ns.

Reading a capture

Worth roughly 11% of throughput for nothing but a shorter gap between symbols, which is why it is set on essentially everything.

Where it sits

HT Capabilities Information › Short GI for 20 MHz

Authored in HT Capabilities element . Drawn in 4 frames.

• Association Request
• Association Response
• Probe Request
• Probe Response

Accuracy

Clause

802.11-2024 §9.4.2.55.2

Verified

Not verified against the standard. Treat this as a claim, not a fact.