Today came to me the same, only high-voltage DP20003 from the company Micsig. Multipliers X200 and X2000 and maximum voltages, respectively 560V / 5600V. Quickly checked parameters give Rice Time ~ 10nS (against the stated 3.5 nS) and a frequency range of up to 25MHz on the AFC drop (-3dB) (against the stated 100MHz). So the Chinese are lying, the real delay is three times worse than the stated Rise Time parameter.
And this does not seem to be an isolated case, but a a deceptive business put on stream.
Just a week ago I'm received from a current probe of the upper model Micsig CP2100B(2.5 MHz/175nsec) at a price of ~ $ 360. Promised a delay of less than 175nsec. As a result, after the tests, I got a delay of more than 450nsec, which is in fact the Junior CP2100A model with a price of about $165.
In the last case, a dispute was opened with the seller, and the device had to be sent to China as not meeting the stated parameters.
To say that I am angry, - is say nothing.
All such stories happen in the world, dear community...