I found the issue after reading the 250 MHz probe specs on your site. I had the probe set to 1:1 which as it states is limited to 10 MHz. Thanks for a great product.

I just had a PicoScope 3206 sent thru our in house metrology department and the resulting bandwidth is around 10 MHz. The test criteria is send a 1.2 Vpp sinewave to the input and find the 3 dB cut off point. I then followed up with my own test at my bench using an Agilent 33220A Function Generator ...