AFE7901: ADC Ramp test pattern appears on A and B channels when enabled only on A

Tool/software:

I am using CAFE79xx_V2p5 lib to configure and enable ADC ramp test pattern. When I set topno=0 and chno=0, ramp test pattern appears on both A and B channels instead only on A. Is this expected behavior?
Attaching latte config file. 8030.Afe79xxPg1_6664_491.txt