Freeview transmissions on Mendip

Mux	Effective power level	Rating	Mode	Watts
1		Maximum	16QAM-2k 18Mb/s MPEG2	10,000
	1 BBC One (West), 2 BBC Two (England), 7 BBC Three, 70 CBBC Channel, 80 BBC News, 105 BBC Interactive text, on C59+ (778.2MHz)
2		Low	64QAM-2k 24Mb/s MPEG2	10,000
	3 ITV1 (HTV West), 4 Channel 4, 5 FIVE, 6 ITV2, 13 Channel 4+1, 14 More4, 28 E4, 33 ITV2+1, 100 Teletext, 101 Teletext Holidays, 104 Teletext on 4, 728 Heart, on C55+ (746.2MHz)
A		Low	64QAM-2k 24Mb/s MPEG2	10,000
	10 ITV3, 16 QVC, 20 Virgin 1, 23 Bid TV, 30 FIVER, 31 FIVE USA, 38 Quest, 39 TOPUP Stream 2, 40 TOPUP Stream 3, 72 CITV, 84 CNN International, 103 Teletext Casino, 712 Smash Hits! Radio, on C62+ (802.2MHz)
B		Maximum	16QAM-2k 18Mb/s MPEG2	10,000
	0 Community, 9 BBC Four, 71 CBeebies, 81 BBC Parliament, 105 BBC Interactive text, 301 BBCi 301, 302 BBCi 302, 303 BBC Sport Interactive, 700 BBC Radio 1, 701 1Xtra BBC, 702 BBC Radio 2, 703 BBC Radio 3, 704 BBC Radio 4, 705 BBC Radio 5 Live, 706 BBC Radio 5 Live Sports Extra, 707 BBC Radio 6 Music, 708 BBC Radio 7, 709 BBC Asian Network, 710 BBC World Service, on C65+ (826.2MHz)
C		Maximum	16QAM-2k 18Mb/s MPEG2	10,000
	11 Sky3, 19 Dave, 29 E4+1, 37 price-drop tv, 82 Sky News, 83 Sky Sports News, 108 Sky Text, 108 NHS Direct, 723 talkSPORT, 725 Premier Christian Radio, 727 Absolute Radio, on C56+ (754.2MHz)
D		Maximum	16QAM-2k 18Mb/s MPEG2	10,000
	12 Yesterday, 15 Film4, 18 4Music, 21 VIVA, 22 Ideal World, 24 ITV4, 25 Dave ja vu, 35 Virgin 1+1, 41 TOPUP Anytime4, 43 Gems TV, 45 Lottery Xtra, 85 Russia Today, 711 The Hits radio, 713 Kiss radio, 714 Heat Radio, 715 Magic radio, 716 Q radio, 718 Smooth radio, 722 Kerrang! radio, 36 Create and Craft, on C67 (842.0MHz)

To receive Freeview from the Mendip transmitter you will require an aerial of group E/W positioned horizontally. This transmitter is 560 metres above sea-level, and transmits at 9,166 watts.

Full list of Freeview transmitters.

Self-help relays

Self-help relays are transmitters that are not owned by the broadcasting and transmission companies, but by the local users. An active deflector (AD) re-transmits the analogue broadcasts on the same frequencies as the original broadcasts, while a transposer (T) transmits the received broadcasts on different frequencies.

Relay name	Type	Location	Notes
CHEDDAR	T	15 km E Weston-super-Mare	1674 homes
LUCCOMBE	AD	6 km w Minehead	38 homes

Transmission frequencies

Before Sunday 15th November 1998

C37*	C54	C58	C61	C64
FIVE	C4	BBC One	ITV1	BBC TWO

Sunday 15th November 1998 to Wednesday 24th March 2010

C37*	C54	C55+	C56+	C58	C59+	C61	C62+	C64	C65+	C67
FIVE	C4	Mux 2	Mux C	BBC One	Mux 1	ITV1	Mux A	BBC TWO	Mux B	Mux D

After Wednesday 7th April 2010

C48	C52	C54	C55	C56	C58	C59	C61
Mux SDN	Mux ArqA	Mux D3+4	Mux NEW7	Mux ArqB	Mux BBCB	Mux NEW8	Mux BBCA

Colour bands denote aerial groups: Red:A Yellow:B Green:C/D Brown:E Grey:K Black:Wideband

Notes

'Out of group' frequencies are marked with a star. Analogue power output 500,000 Watts, post switchover average digital multiplex output will be 75,000 Watts.

To receive signals from this transmitter, the aerial must be mounted for horizontal polarization – the elements going from left to right.

The first designation for the post-switchover multiplexes was: multiplexes 1 and 2 were prefixed "PSB" (for Public Service Broadcasting) and multiplex B becomes "PSB3". The commercial multiplexes A, C and D became "COM4", "COM5" and "COM6". As switchover the PSB1, PSB3, COM5 and COM6 will switch to 64QAM mode transmission, so all multiplexes will transmit in the 64QAM (2/3) 8k mode.

However, Ofcom now calls the PSB multiplexes BBCA, D3+4 and BBCB, the commercial ones are SDN, ArqA and ArqB. In addition the BBCB multiplex will now, from December 2009, be used for the 256QAM DVB-T2 high definition service. This multiplex MAY also be provided from some transmitters before switchover.

Before digital group C/D will not receive "five". (Aerial group appears to be: E W). Upgrade to Wideband aerial requried to watch all Freeview channels during dual running of analogue and digital television. After switchover an existing group C/D aerial will provide all digital TV services.

itv1 - Mendip transmitter area*

Date	Incumbent ITV company
14th Jan 1958 to July 1968	Television Wales and the West (TWW)
July 1968 to date	Harlech Television
1st Feb 1983 to 31st Dec 1992	TV-am (breakfast)
1st Jan 1993 to date	GMTV (breakfast)
Note	For digital switchover this region is now known as HTV West.

* The Mendip transmitter was not an original ITV VHF 405-line transmitter: the historical information shown above includes the details of the company reponsible for the Mendip transmitter when it began transmission.

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