1, signal front-end adjustment, signal temporarily interrupted, generally after 12 pm.
2. Cable is interrupted due to construction and other reasons.
3. Signal interruption caused by equipment failure in corridor or residential area.
4. Signal interruption due to home line connection.
Several processing methods of TV signal interruption;
1. Close the set-top box, take the smart card out of the set-top box, blow air on the smart card chip (yellow copper sheet) with your mouth, then wipe it with a soft cloth and try it on.
2. Reconnect all audio, video and wired input lines connected to the TV and set-top box. Click the "Status" button on the remote control of the set-top box, and you can see that the signal quality cannot be lower than 50%.
3. If all the above fails, switch the TV to the TV frequency band and try those channels that originally gave away analog TV signals for free. If not, maybe the TV is broken.
Extended data:
Introduction of signal interruption and signal abnormality;
Exception handling: When an exception occurs, the CPU control unit generates a hardware error code. LCPU finds the corresponding vector in the interrupt vector table according to the interrupt, and switches to the interrupt handler according to the vector. L After the interrupt handler finishes processing, it sends SIG*** signal to the current process.
L If the process defines the corresponding signal processing program, the corresponding program is called for execution; If not, the kernel-defined operation will be performed.
Interrupt processing: L device generates an interrupt, and lPIC (programmable interrupt controller) generates the corresponding interrupt vector. L and each interrupt vector in the interrupt vector table, and go to the corresponding interrupt handler.
L The interrupt handler saves the scene, performs relevant processing, and restores the scene. L kernel scheduling, return to the user process.