| Type | Slowest sweep rate | Fastest sweep rate | Magnifier | Special functions | |
| 3T2 | 1ms/div | 20ps/div | 10 | random sampling, display, variable samples/div | |
| 3T4 | 0.2ms/div | 100ps/div @ 10 samples/div | 10 | programmable | |
| 3T5 | 500ms/div | 200ps/div | – | programmable, display, digital delay | |
| 3T6 | 500ms/div | 200ps/div | – | programmable, display, digital delay | |
| 3T7 | 1µs/div | 100ps/div | special TDR timebase for 3S7, not compatible to other plug-ins | ||
| 3T77 3T77A | 10µs/div | 20ps/div @ 10 samples/div 20ps/div @ 100 samples/div | 10 |