Vivotek MD9584-HF3 5MP Outdoor Network Mobile Dome Camera with Night Vision, Heater & 3.6mm Lens - Manual (Page 18)

VIVOTEK
18 - User's Manual
Some, but not all special ASCII characters are supported: !, $, %, -, ., @, ^, _, and ~.
You can use them in the password combination.
10-3. Another prompt will request for the password you just configured. Enter the password
and then you can start configure your camera and see the live view.