The actual unit is around $33 USD. Typical misleading landing pages. Rather annoyed they don't say what chip, but it's obvious from the BW and range. I just can't remember.
I just received one I bought for evaluation. I have ready to hand an 8648C and 438A with appropriate sensors. And an 8340B if it looks promising. I have an ample supply of step attenuators of varying resolution and unknown accuracy. JFWs being my favorites for general convenience.
Initial thought is to calibrate a splitter by reversal and then measure a series of frequencies and levels showing the 8348C, 438A and AD???? eval board values.
Any suggestions of more devious tests?
Have Fun!
Reg.