How to rescan DVB-T/T2 channels step by step | When it makes sense
Check when re-tuning is enough and when you first need to correct the transmitter, direction or antenna configuration.
How to rescan DVB-T/T2 channels step by step
Rescanning channels only helps if the starting point is correct. If the problem is with transmitter selection or direction, tuning alone will not correct reception.
Verify the starting point in the application
DVB-T Finder Map in the App Store
DVB-T Finder Map on Google Play
When just tuning is enough
After a minor correction of the antenna position, when the signal was previously stable.
After changing the cable, splitter or other installation element.
After temporary problems with the channel list, but without symptoms of permanent reception instability.
Full scan or quick retune
Mode | When to use | Advantage | Risk |
|---|---|---|---|
Full scan | After a major setting change or problems with the channel list | A more complete result | Longer time |
Quick retune | After a minor correction and a stable starting point | Speed | It may miss some of the problems |
Symptom and next step
Symptom | Do start with scanning | What to check in parallel | Priority |
|---|---|---|---|
Channels disappeared after changing the antenna setting | Yes | Direction and transmitter | Tall |
Some channels come back and disappear | It's not enough | MUX stability and direction | Very tall |
After retuning channels, entire packages are still missing | NO | Transmitter and setting | Very tall |
The channel list is incomplete, but reception was previously stable | Yes | Correct tuning | Mediocre |
How to do a channel rescan
Record the current starting point: transmitter, direction and reception result.
Perform a full channel scan, not just a quick refresh.
Check if entire channel packages are back, not just individual programs.
If the result is poor, go back to verify the transmitter and direction instead of repeating the same scan multiple times.
Related pages
Quick tuning of DVB-T/T2 channels in United Kingdom
The best DVB-T/T2 transmitter in United Kingdom
No DVB-T/T2 signal - quick diagnosis
FAQ
Is it worth repeating the scan several times in a row?
Not if the starting point is wrong. Then the problem is not the scanning itself, but the transmitter or direction.
When should I change the transmitter after scanning?
When the selected MUXs are still missing or the reception remains unstable despite correct retune.
Is a quick retune sufficient?
For larger settings changes, it is better to perform a full scan because it gives a more reliable result.