Replies to This Discussion

Permalink Reply by Bill McMurray on May 16, 2013 at 23:18

Hi Julian,

A very good question, and one I've been meaning to ask myself for some time.

We struggle to get reasonable strength UHF signals in most of the Waikato, and were told, when UHF digital first started transmission, that the signals had been attenuated so that they wouldn't overpower the analogue signal.

So, if that is the case, when the terrestrial signals are turned off will the digital signals be increased in strength?

Cheers,    Bill.

Permalink Reply by Aaron Butler on May 18, 2013 at 14:31

this probably isn't any help to you guys but i'm in north canterbury and the signal has always been rock solid in the 5 years i've had freeview. i know that jda will be upgrading the signal in nelson over the coming months.

Permalink Reply by nzdtv.com on May 18, 2013 at 22:40

The signal in Nelson is not being upgraded only the microwave link is being changed to a fibre source. To stop the seasonal interfearence that was happening and causing dropouts over the past few months.

 

 

 

Permalink Reply by forumuser on May 19, 2013 at 8:16

Hi Guys

Here is a link to the Upgrade Announcement: 
http://freeviewforum.co.nz/forum/topics/freeview-terrestrial-tv-upg...

Permalink Reply by Ross Johnson on June 4, 2013 at 19:08

With the correct antenna installed the signal strength by default at the antenna should be sufficient to provide perfect DVB-T reception. Path loss equations indicate reception from the main transmitters way past 100 kms out. DVB-T tuners will lock as low as 42 dBuV or so. Signal at a simple outdoor antenna in Ashburton for example is predicted to be 57 dBuV at antenna by appropriate equations.

Substandard reception from use of indoor antennas where the signal is effectively shielded from the antenna by structures can of course be easily resolved. Strength on an indoor antenna at set height may be marginal at around 42 dBuV with an outdoor solution at same geographic location providing 60 to 80 dBuV.

Permalink Reply by Julian Visch on June 4, 2013 at 21:09

So as my parents are only about 2 km from the transmitter, surely an internal aerial would be more than sufficient for picking up the signal.

Ross Johnson said:

With the correct antenna installed the signal strength by default at the antenna should be sufficient to provide perfect DVB-T reception. Path loss equations indicate reception from the main transmitters way past 100 kms out. DVB-T tuners will lock as low as 42 dBuV or so. Signal at a simple outdoor antenna in Ashburton for example is predicted to be 57 dBuV at antenna by appropriate equations.

Substandard reception from use of indoor antennas where the signal is effectively shielded from the antenna by structures can of course be easily resolved. Strength on an indoor antenna at set height may be marginal at around 42 dBuV with an outdoor solution at same geographic location providing 60 to 80 dBuV.

Permalink Reply by Mike G on June 7, 2013 at 0:57

Yes it will pick up lots of signals, but they'll be from multiple paths as the internal aerial is prone to receiving reflected signals. This will cause breakup unless the placement of the indoor aerial is lucky. At that close distance, you could put your finger in the aerial socket on the tv and you'd get a picture.

Julian Visch said:

So as my parents are only about 2 km from the transmitter, surely an internal aerial would be more than sufficient for picking up the signal.

Ross Johnson said:

With the correct antenna installed the signal strength by default at the antenna should be sufficient to provide perfect DVB-T reception. Path loss equations indicate reception from the main transmitters way past 100 kms out. DVB-T tuners will lock as low as 42 dBuV or so. Signal at a simple outdoor antenna in Ashburton for example is predicted to be 57 dBuV at antenna by appropriate equations.

Substandard reception from use of indoor antennas where the signal is effectively shielded from the antenna by structures can of course be easily resolved. Strength on an indoor antenna at set height may be marginal at around 42 dBuV with an outdoor solution at same geographic location providing 60 to 80 dBuV.

Permalink Reply by Steve J on June 13, 2013 at 7:18

Even people walking around the room cause reflections and fading    . On analog you could see the issues . On digital it may just stop  due to the MER being poor . Jow Public wont understand whats happening .  Put up a small outdoor antenna even when you a close to the transmitter .   Transmitter power increases ? highly unlikely !

Permalink Reply by forumuser on June 19, 2013 at 22:53

I have relocated this discussion in the Reception and Technical Issues database.

Regards

Josh