It sounds like you might have a Bakers Pride deck oven. Normally, the top heat is expressed in low, medium or high, while the bottom (deck) temperature is set to a specific temperature. Since your oven sounds like an electric oven, some changes in temperature might be needed, but this is what I use as a basic setup for an oven of this type:
Bottom temperature 500 to 550F
Top temperature medium heat. Use the top heat adjustment to get the toppings baked along with the bottom of the crust.
Bake time will vary, but I normally look for something in the 12 to 15-minute range.
Tom Lehmann/The Dough Doctor