[mythtv-users] DVB-T Hell in Sydney
J.Pilk at tesco.net
Wed Jun 22 08:48:56 UTC 2016
On 22/06/16 01:27, Doug Scoular (dscoular) wrote:
> Hi All,
> On 20/06/2016, 14:28:20 +0000, Mark Perkins wrote:
>>>> Newcastle transmitter but I had thought the distance would be
>>>> too great (87.3km vs 18.6km).
>>> Sorry if this is no help. I haven't been following this thread but offer
>>> this link in case it helps.
>> Of note - Bouddi is 1.27kw and Newcastle is 250kw.
> That's interesting, I further note that Seven and Nine are repeated on
> less power and they seem more problematic for my location:
> Bouddi Transmitter:
> SBS SBS40 613.500 Mhz 1.27 kW Directional Vertical
> ABC ABC41 620.500 Mhz 1.27 kW Directional Vertical
> Seven ATN42 627.500 Mhz 1.27 kW Directional Vertical
> Nine TCN43 634.500 Mhz 1.27 kW Directional Vertical
> Ten TEN44 641.500 Mhz 1.27 kW Directional Vertical
> Seven NEN46 655.500 Mhz 650.00 W Directional Vertical
> Nine NBN47 662.500 Mhz 650.00 W Directional Vertical
> I have scanned frequencies which don't match the Bouddi table, above, but
> are more in-line with the ones coming from Newcastle (there seem to be
> more transmitters in the area but this is the one the
> https://myswitch.digitalready.gov.au/ shows as my alternative):
> Newcastle, Mt. Sugarloaf:
> Newcastle Digital TV Channels at Mt Sugarloaf
> Seven NEN35 578.500 Mhz 250.00 kW Omnidirectional Horizontal
> Nine NBN36 585.500 Mhz 250.00 kW Omnidirectional Horizontal
> ABC ABC37 592.500 Mhz 250.00 kW Omnidirectional Horizontal
> SBS SBS38 599.500 Mhz 250.00 kW Omnidirectional Horizontal
> Ten NRN39 606.500 Mhz 250.00 kW Omnidirectional Horizontal
> So I guess I have two burning questions:
> 1. How do I identify the transmitter, is there some way to determine it
> from the network id or other data in the stream?
> 2. Why are all my scanned channels shown as having vertical polarisation
> when the suspected channels from Newcastle (Australia) transmitters should
> have horizontal polarisation? I fear my antenna is horizontal - so maybe
> this weekend I'll try re-orienting the antenna to vertical to match the
> Bouddi transmitter and MythTV table.
If your antenna has horizontal elements it's likely it was set up for
Newcastle. The polarisation entry in the DB is a default value, and
irrelevant. The frequencies in your DB identify the mux and the
transmitter. I would try using the Transport Editor to delete all the
Bouddi muxes. If results are bad, rotate (and re-point?) the antenna
and delete the Newcastle muxes instead.
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