Final answer:
The maximum adjustable voltage (Vdc) for the AN/AVS-9V NVG's power supply is approximately 75 KV, represented by VAB, which is quoted to two digits.
Step-by-step explanation:
The maximum voltage (Vdc) that the power supply output can be adjusted to on the AN/AVS-9V Night Vision Goggles (NVG) is 75 KV. VAB represents this voltage setting, and it indicates the peak voltage to which the device's power supply can be adjusted. It is important to note that the value is approximate and is typically presented only to two digits for simplicity and ease of use.