Thurlby-Thandar-40 M Hz-DDS-Function-Arbitrary-Generator-GPIB-Interface-TG4001GP-Thurlby-Thandar-TG4001GP-P-The-Thurlby-Thandar-TG4001GB-provides-high-purity-sine-waves-at-up-to-40 M Hz-&-square-waves-at-up-to-50 M Hz-No-other-DDS-generator-offers-this-performance-at-this-price-The-output-amplifier-has-a-bandwidth-approaching-100 M Hz-ensuring-that-waveform-quality-is-excellent-right-up-to-the-frequency-limits-Amplitude-flatness-is-better-than-plusmn-0-2d B-to-1 M Hz-&-plusmn-0-4db-t