Voltcraft-FG-250D-Function-Generator-VOLTCRAFT-FG-250D-p-The-Voltcraft-FG-250D-function-generator-is-easy-to-use-&-reliable-for-applications-in-the-NF-range-up-to-250k Hz-The-FG-250D-is-suitable-for-testing-control-circuits-analogue-&-digital-circuits-or-for-measuring-the-frequency-response-of-LF-amplifiers-filters-&-speakers-The-amplitude-of-sine-&-triangular-signals-can-be-modified-in-the-range-from-100m V-to-5 Vpp-The-amplitude-of-the-rectangular-signal-corresponds-to-the-TTL-l