QA480 1 kHz Oscillator + Notch
The QA480 is a very precise 1 kHz sine wave generator combined with 63 dB step attenuator (1 dB step size) and a low-noise notch.
This product is for those doing R&D that need to measure products with THD+N approaching -120 dB and THD approaching -140 dB.
The QA480 is fully isolated, USB powered, and achieves its specifications without the need for an external lab-grade supply. All in a box the size of a thick paperback book (177 mm wide, 44 mm tall, 97 mm deep).
See the link below for more info on the lineage of the product.