Originally Posted by Archie_back
When the radio is tuned to say 93.5 the signal keeps jumping to 97.7
every few seconds for just a second then goes back to original station.
As Metal Mickey Says,
this is taken from C-Max Stereo Manual:
ALTERNATIVE<?: prefix = o ns = "urn:schemas-microsoft-comfficeffice" />
Many programmes broadcast on the FM waveband have a programme identification (PI) code, which can be recognised by audio units.
If your radio has AF tuning switched on and you move from one transmission area to another, this facility will search for and switch to a stronger station signal, if one can be found.
Under certain conditions, however, alternative frequency tuning may temporarily disrupt normal reception.
With ‘AF-ON' or ‘AF-AUTO' selected, the unit continually evaluates signal strength and, if a better signal becomes available, the unit will switch to that alternative. It mutes while it checks a list of alternative frequencies and, if necessary, it will search once across the selected waveband for a genuine alternative frequency.
It will restore radio reception when it finds one or, if one is not found, the unit will return to the original stored frequency. On certain units, ‘Not Found' will be displayed. With ‘AF-MAN' selected, the unit operates in a similar way to ‘AF-AUTO' or ‘AF-ON', but only searches for an alternative frequency when prompted by pressing a preset button.
With ‘AF-OFF' selected, the original stored frequency remains selected.
In this mode, ‘AF-OFF' will be displayed every time the unit is turned on.
Hope this helps,