Go in the elevator. Flip the switch to UP. Exit the elevator to the tower. The tower has similar setup like other rooms. Find the power generator and adjust the connectors so the generator can start working. Turn the power switch to power up the observatory. Follow the electrical wire to the device on a tripod. Flip four switches and press the diamond button in the middle. The oscilloscope is broken. Pick up a screwdriver next to the oscilloscope.
Exit study room. Go back to the library. Use the elevator to go back to the tower. Open the panel on oscilloscope. Insert electrical component. Adjust the frequency so the green waves align with the black waves. The device on tripod will start working. You will be taken to the observatory.