UCC33420: EMC problems with UCC33420

Tool/software:

Good day,
I use the UCC33420 to supply an isolated current measuring amplifier. I have provisionally soldered it to the board with thin copper wires. I attached 2n2 and 10µF directly to the IC. In a preliminary EMC measurement I get massive interference at approx. 7.5MHz. I think the problems are due to my provisional assembly. However, I cannot understand why I get interference at 7.5MHz. The device works at 75MHz! Does the device work internally with a PLL?
Can I assume that the EMC results are OK if the device is mounted correctly?