Question about A/C converter


I am trying to use A/D converter on Fastrack Supreme.
I found this

“The AT Command retrieves measurements on ADC A, ADC B, ADC C and ADC D in mV. The is the AUX_ADC measured value in mV.”

on Fastrack Supreme Manual( … e_Rev1.pdf)

I wonder what does this means?
It seems that Fastrack Supreme only has one ADC.
Would I be able to use it to convert more than one signal?
Please help me.
Thank you.