Linear Slew rate verification for wideband amplifiers from Linear, an app note (PDF) :
Slew rate defines an amplifier’s maximum rate of output
excursion. This specification sets limits on undistorted
bandwidth, an important capability in A/D driver applications. Slew rate also influences achievable performance in D/A output stages, filters, video amplification and data acquisition. Because of its importance, amplifier slew rate must be verified by measurement. Deriving a measurement approach requires understanding slew rate’s relationship to amplifier dynamics.