Can be connected to the receiver antenna to receive the signal from the camera. Both are fed by their respective sources.
I called all as suggested in the manual and the video output signal was fading, suggesting a bad contact. I ended up solving open the equipment and ressoldar the video RCA connector. Below the photo of the circuit.
The manual doesn't explain this, but it's easier to make work if you connect it with the camera right next to the tune. Slowly turn the potentiometer “tuner” until the image. The camera is very noisy, but serves well in security systems.
The night vision is not very good. Below is the same photo with my bedroom light off. The camera has an Infrared Illuminator made with four leds, that clearly is not very efficient.
What bothered me most in this camera was the small working distance, not much bigger than a few meters. In the building where I live, I connected the camera one floor above me and the reception was horrible. Almost didn't work. If you need a wireless camera to cover walking distance or obstacles will work, Although still with a bit of noise. Those interested leave below the link to purchase: