The ADL5506 evaluation board dosen't work

Hi, I need your help.

I use a RF waveform generator (channal one) to provide DC singnal (2V) for the enable pin of the ADL5506 evaluation board, and use the same RF waveform generator (channal two) to provide RF singnal (sine, 50kHz, Vpp=5V) for the RF input pin of the ADL5506 evaluation board.

A DC source is used to provide DC power (3V) to the VPOS pin of the ADL5506 evaluation board.

The output value of the VLOG pin is checked by a RF oscilloscope, but there is no signal shown in the RF oscilloscope but noise signal.

Is there any mistake in my connection? 

[edited by: JValeriani at 7:42 PM (GMT 0) on 9 Oct 2019]