Generating +/- 7v from EVM DC 1854A
Based on the data sheets for the part here:
https://www.analog.com/media/en/technical-documentation/data-sheets/8471fd.pdf

On page 14, on the top right side, is the heading "Setting the Output Voltage (Primary Channels)". There is a description and the formula for selecting the proper resistor for the output voltage you want.

Use Application notes as much as you can to create what you need.

Typical of most circuits, there is a LOT of information to take into consideration when building this circuit.