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Post switchover signal strength.

Stephen Phillips asked about the relative strength of the analogue and digital signals.

Stephen Phillips asked about the relative strength of the analo
published on UK Free TV

Stephen Phillips asked about the relative strength of the analogue and digital signals.

Below is a table which shows the absolute and relative values.

The table lists the names of all the current digital transmitters, their current average power output for Freeview, the current average output for analogue, the post-switchover average output for Freeview.

It is worth noting that the Freeview signals will be doing their bit to save the planet - being at around 20% of the current analogue levels.

Transmitter

Current digital

Current analogue (W)

Post-switchover(W)

Digital Increase

Final d:a

Aberdare

75

500

100

133.33%

20.00%

Angus

2000

100

15000

750.00%

15000.00%

Beacon Hill

1000

100000

15000

1500.00%

15.00%

Belmont

7166

500000

116666.67

1628.06%

23.33%

Bilsdale

5800

500000

75000

1293.10%

15.00%

Black Hill

20000

500000

100000

500.00%

20.00%

Blaenplwyf

1666

100000

25000

1500.60%

25.00%

Bluebell Hill

2666

30000

20000

750.19%

66.67%

Bressay

1000

10000

2000

200.00%

20.00%

Brierley Hill

122

10000

2000

1639.34%

20.00%

Bristol Kings Weston

45

1000

200

444.44%

20.00%

Bromsgrove

31

2

400

1290.32%

20000.00%

Brougher Mountain

500

100000

11000

2200.00%

11.00%

Caldbeck

4133.33

500000

72222.22

1747.31%

14.44%

Caradon Hill

3833

500000

75000

1956.69%

15.00%

Carmel

2000

100000

15000

750.00%

15.00%

Chatton

4166

100000

15000

360.06%

15.00%

Chesterfield

36

2000

466.67

1296.30%

23.33%

Craigkelly

2000

100000

15000

750.00%

15.00%

Crystal Palace

20000

1000000

200000

1000.00%

20.00%

Darvel

2000

100000

15000

750.00%

15.00%

Divis

2483

500000

75000

3020.54%

15.00%

Dover

1000

100000

60000

6000.00%

60.00%

Durris

10000

500000

75000

750.00%

15.00%

Eitshal

800

100000

15000

1875.00%

15.00%

Emley Moor

8166

870000

174000

2130.79%

20.00%

Fenham

20

2000

400

2000.00%

20.00%

Fenton

50

10000

1500

3000.00%

15.00%

Guildford

100

10000

2000

2000.00%

20.00%

Hannington

10000

250000

37500

375.00%

15.00%

Hastings

183

1000

750

409.84%

75.00%

Heathfield

1200

100000

20000

1666.67%

20.00%

Hemel Hempstead

200

10000

2000

1000.00%

20.00%

Huntshaw Cross

3666

100000

15000

409.17%

15.00%

Idle

5

250

50

1000.00%

20.00%

Ilchester Crescent

20

500

150

750.00%

30.00%

Keelylang Hill

1000

100000

15000

1500.00%

15.00%

Keighley

91

10000

2000

2197.80%

20.00%

Kilvey Hill

383

10000

2000

522.19%

20.00%

Knock More

1000

100000

11287.5

1128.75%

11.29%

Lancaster

183

10000

2000

1092.90%

20.00%

Lark Stoke

25

6

1300

5200.00%

21666.67%

Limavady

800

100000

15000

1875.00%

15.00%

Llanddona

1000

100000

15000

1500.00%

15.00%

Malvern

200

2000

400

200.00%

20.00%

Mendip

9166

500000

100000

1090.99%

20.00%

Midhurst

1250

100000

15000

1200.00%

15.00%

Moel-Y-Parc

416

100000

15000

3605.77%

15.00%

Nottingham

37

2000

400

1081.08%

20.00%

Olivers Mount

91

1000

1500

1648.35%

150.00%

Oxford

8000

500000

75000

937.50%

15.00%

Pendle Forest

91

500

100

109.89%

20.00%

Plympton

183

2000

400

218.58%

20.00%

Pontop Pike

9666

500000

75000

775.92%

15.00%

Pontypool

15

250

50

333.33%

20.00%

Presely

833

100000

15000

1800.72%

15.00%

Redruth

1850

100000

15000

810.81%

15.00%

Reigate

150

10

2000

1333.33%

20000.00%

Ridge Hill

2000

100000

15000

750.00%

15.00%

Rosemarkie

10000

100000

15000

150.00%

15.00%

Rosneath

200

10000

1336

668.00%

13.36%

Rowridge

20000

500000

200000

1000.00%

40.00%

Rumster Forest

1333

100000

15000

1125.28%

15.00%

Saddleworth

36

2000

400

1111.11%

20.00%

Salisbury

690

10000

2000

289.86%

20.00%

Sandy Heath

18333

1000000

200000

1090.93%

20.00%

Selkirk

3000

50000

7500

250.00%

15.00%

Sheffield

50

5000

1000

2000.00%

20.00%

Stockland Hill

2500

250000

37500

1500.00%

15.00%

Storeton

51

2

560

1098.04%

28000.00%

Sudbury

5033

250000

100000

1986.89%

40.00%

Sutton Coldfield

8000

1000000

200000

2500.00%

20.00%

Tacolneston

6666

250000

100000

1500.15%

40.00%

The Wrekin

1000

100000

15000

1500.00%

15.00%

Torosay

125

20000

4000

3200.00%

20.00%

Tunbridge Wells

100

10000

4000

4000.00%

40.00%

Waltham

4500

250000

37500

833.33%

15.00%

Wenvoe

5833

500000

75000

1285.79%

15.00%

Whitehawk Hill

367

10000

4000

1089.92%

40.00%

Winter Hill

9166

500000

100000

1090.99%

20.00%



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Comments
Saturday, 17 March 2012
Dave Lindsay
12:05 PM

Grant Buckley: Looking at the location and the fact that your aerial is, one assumes, on the top of the six storey block, you should not have any issues with signal strength.

Where a communal aerial system is provided, then the signal should be the appropriate level when it comes out of the wall socket. If it's not, then it is the operator's responsibility. The operator is probably the landlord.

However, the first thing to check is that the your receiver is tuned to the signals from the transmitter to which the aerial faces. The height of the aerial makes it very likely to be receptive to signals from other (which the aerial does not face).

Which programme channels show low signal strength and drop-out?

Also, for each of the following, go to the signal strength screen and let us know which UHF channel it is tuned to. Receivers usually give this information, although not always.

BBC One (probably channel 24 or 47)
ITV1 (probably channel 21 or 44)
BBC One HD (if applicable) (probably channel 27 or 41)
ITV3 (probably 42 or 51)
Pick TV (probably 45 or 52)
Yesterday (probably 39 or 48).

link to this
Dave Lindsay's 5,724 posts Platinum Platinum GB
Dave Lindsay
12:09 PM

Grant Buckley: Yesterday will probably be 39 or 48; let us know which.

link to this
Dave Lindsay's 5,724 posts Platinum Platinum GB
G
Grant Buckley
2:35 PM

Thanks for getting back so quickly. The main channels are all OK - BBC 1 & 2 on 47, ITV 1 on 44, Ch4 on 44 & Ch5 on 44.
The channels, which I would want to watch, that are causing the problems are:
ITV3 on 51, Dave on 52, ITV 4 on 48 (varies), Dave ja vue also on 52 (don't understand how this is the same as Dave), ITV2 + 1 on 51, E4+1 on 52, 5* & 5 USA both on 51, Quest on 51, Channel 5+1 on 51 and Food network on 52.
I don't understand how the programme channels can share the broadcast channels, but I suppose that is the 'digital' bit.

link to this
Grant Buckley's 5 posts GB
Dave Lindsay
5:52 PM

Grant Buckley: Your reply has confirmed that all channels are tuned correctly to the same transmitter, Emley Moor.

As you have found, digital broadcasts carry a number of services as part of the same signal. That is you get a basket of programme channels on one frequency known as a multiplex. The six I listed above are each part of a different multiplex.

When did this problem begin?

Have you tried changing the aerial lead from the wall to the TV? Is it short?

link to this
Dave Lindsay's 5,724 posts Platinum Platinum GB
Sunday, 18 March 2012
G
Grant Buckley
5:47 AM

Dave Lindsey: I moved in to the flat a couple of weeks ago and so, with settling in, it has taken me a bit of time to find the pattern of behaviour of the channels.

I have put a shorter aerial cable in place and this morning the signal strength, on the affected channels, seems to be better.

I'll monitor it and let you know of any prolonged improvement. Thanks.

link to this
Grant Buckley's 5 posts GB
Monday, 19 March 2012
G
Grant Buckley
7:58 AM

Dave Lindsey: It looks like the shorter, better quality aerial cable has solved the problem - thanks.

link to this
Grant Buckley's 5 posts GB
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