Ancient Technology is a side quest in Skyrim: Dawnguard.
It is only available to Dawnguards.
The quest Ancient Technology starts in Fort Dawnguard
Ancient Technology is given by Sorine Jurard.
Sorine Jurard has sent me to retireve the Enhanced Crossbow Schematic from Halted Stream Camp. She will be able to use it to master new technology to provide to the Dawnguard members
Retrieve the Dwemer Exploding Shock Bolt Schematic / Dwemer Enhanced Crossbow Schematic / Dwemer Exploding Fire Bolt Schematic / Dwemer Exploding Ice Bolt Schematic / Dwemer Enhanced Dwarven Crossbow Schematic
Schematic type and location will vary. Go to the dungeon specified and you should find the schematics in a chest at the end of the dungeon
Go back to Fort Dawnguard and turn in the quest to Sorine.