MORE than 1100 calls have been made to the Department of Communications on its Digital Ready Information Line from people living in the Wide Bay since the digital retune in October.

The majority of these calls were received on the day of and day after the retune on October 16 and nearly 90% before October 24.

However, Jim's Antennas Bundaberg owner Donald Tippet said he was still visiting homes with TV reception problems and antennas that are 30 years old.

"What we are finding is there are about four different antennas about 12 to 18 years old that were not made for the digital channels that are out here now," he said.

Mr Tippet said when he arrived at a property, he checked if the antenna was positioned correctly.

"We have struck that plenty of times where things have changed like trees have grown or it was just in a bad place," he said.

"What we do is take their antenna off the mast and hook our meter on to it, and walk around until we find the best position on the roof."

An Australian Communications and Media Authority spokeswoman said some older antennas were designed to not cover the full range of VHF frequencies and the department had become aware that some retailers and installers in the region have previously distributed such antennas in the Wide Bay area.

Another issue that can crop up with digital TV is the cliff edge, which refers to the way that digital TV maintains almost perfect pictures even when signal levels become weaker, and then at a critical low threshold level suddenly degrades and starts to pixelate.

The spokeswoman said the effect was a characteristic of digital TV and affected viewers who live in marginal coverage areas, viewers with inadequate or inappropriate antenna receiving installations or viewers impacted by interference.

"In comparison, analog television picture gradually degraded as the signal became weaker until it became snowy," she said.

The spokeswoman said viewers experiencing television reception problems should engage an experienced antenna installer who should be able to recommend the best antenna type, placement and orientation to get reliable reception.

"An experienced antenna installer should be able to identify if the television coverage at their location is sufficient to provide adequate terrestrial television reception or if the Government's Viewer Access Satellite Television (VAST) service is their best option."

Viewers should visit myswitch.digitalready.gov.au for more information.