和HP54600系列配合使用 The 54657A Storage Module allows you to monitor waveforms via GP-IB. The unit allows you to expand the power and waveform memory of your 54600-series scope. • FFT feature allows you to analyze your signal in the frequency domain. • Adds GP-IB and remote programming capability. • Can store up to 100 traces in nonvolatile memory. • Adds unattended waveform monitoring - can store out-of-limit traces.