Understanding DTT signal loss
Signal loss on your Yagi aerial is a frustrating problem that can occur suddenly or worsen gradually. Identifying the cause enables effective intervention and prevents the problem from recurring.
Symptoms of signal loss
- Completely black screen with the "no signal" message
- Pixelated or frozen picture that deteriorates over time
- Loss of certain channels while others still work
- Intermittent reception that varies by time of day or weather
- Cut or out-of-sync audio
Possible causes
Aerial-related causes
- Misaligned aerial due to wind or an impact
- Broken aerial elements (rods, reflector)
- Advanced corrosion of metal elements
- Loose or tilted mast altering the reception angle
Cable-related causes
- Damaged coaxial cable: cut, severe kink, water ingress
- Oxidised or loose connectors
- Faulty splitter no longer distributing the signal correctly
Amplifier-related causes
- Faulty amplifier following a power surge or storm
- Amplifier power supply cut off (unplugged, tripped circuit breaker)
- Overloaded amplifier due to an excessively strong signal near a transmitter
External causes
- DTT transmitter changes: frequency change, maintenance work
- New obstacle between the aerial and the transmitter (construction, vegetation)
- Temporary extreme weather conditions
Our intervention
Our technicians follow a rigorous protocol to identify and correct the cause of signal loss:
- Signal measurement at the aerial with a professional field strength meter
- Signal measurement at the indoor sockets to detect in-line losses
- Complete visual inspection of the installation from the rooftop
- Systematic testing of each component (cable, connectors, amplifier, splitter)
- Repair or replacement of faulty components
- Final verification of reception on all channels
How to avoid signal loss
- Have your installation checked every 2 to 3 years
- Replace the coaxial cable if it is more than 15 years old
- Install a surge arrester to protect the amplifier
- Check the aerial condition after every episode of strong wind
For any questions or additional information, you can reach us at 06 95 62 24 33, Monday to Friday from 9am to 6pm. Outside these hours, this line is reserved for emergencies, available 24/7.