Moel-Y-Parc digital TV transmitter (no analogue)

Moel-Y-Parc digital switchover schedule

Note: This is the only schedule for digital switchover. Digital services cannot be introduced before the dates listed for "testing purposes" as they will generally use the same transmission frequencies as the services they replace. Another alternative, available today, is Freesat.

Moel-Y-Parc Full Freeview transmitter details - full details of the Freeview services fron Moel-Y-Parc.

November 2009 S M T W T F S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 - - - - -	BBC One Wales, BBC Two Wales, ITV-1 HTV Wales and S4C analogue switched off. It will be necessary to perform a full rescan of your Freeview box on this day.
November 2010 S M T W T F S - 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 - - - -	The following Freeview digital services will be available: 50 BBC HD 51 ITV1 HD 53 Clirlun (S4C HD) It will be necessary to perform a full rescan of your Freeview box on this day.

Transmission frequencies

Before Sunday 15th November 1998

C42	C45	C49	C52
S4C	BBC TWO	ITV1	BBC One

Sunday 15th November 1998 to Wednesday 28th October 2009

C30*	C34*	C42	C45	C49	C52	C54*	C58*	C61*	C64*
Mux C	Mux D	S4C	BBC TWO	ITV1	BBC One	Mux 1	Mux 2	Mux A	Mux B

After Wednesday 25th November 2009¶

C30*	C42	C45	C48-	C49+	C51-	C52+
Mux NEW7	Mux BBCB	Mux BBCA	Mux ArqB	Mux D3+4	Mux SDN	Mux ArqA

¶ NOTE: SDN and Arqiva A at Moel-y-Parc are expected to temporarily operate at 2.5kW until 2011

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 100,000 Watts, post switchover average digital multiplex output will be 12,857 Watts.

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

Before switchover, the public service broadcasting multiplexes were 1, 2 and B; afterwards they were first PSB1, 2 and 3 but now called BBCA, D3+4 and BBCB. The commercial multiplexes A, C and D had initial post-switchover names COM4, 5 and 6; now they are SDN, ArqA and ArqB. At switchover BBCA, ArqA and ArqB will switch from 16QAM to 64QAM mode transmission, so five multiplexes will transmit in the 64QAM (2/3) 8k mode. BBCB is used for Freeview HD (DVB-T2, 256QAM), and has a pre-switchover service on selected main transmitters.

Upgrade to Wideband aerial requried to watch all Freeview channels during dual running of analogue and digital television. After switchover, you will have needed to upgrade to a Wideband aerial to receive some or all digital television services.

Comparison of analogue and digital signal levels

Analogue 1-4
	100kW
BBCA, D3+4, BBCB
	20kW (-7dB)
SDN, ARQA, ARQB
	10kW (-10dB)
Mux1*, Mux2*, MuxA*, MuxB*
	1000W (-20dB)
MuxC*, MuxD*
	250W (-26dB)
*-pre digital switchover (DSO). Decibel values compare to strongest signal value.

The aerial must be mounted horizontally, with the elements in the left-right position

See full list of analogue transmitters for a complete list of shutdown dates.

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
GWYDDELWERN	AD	17 km E Llangollen	62 homes
LLANDEGLA	T	12 km E Wrexham	33 homes
PENTRE-LLYN-CYMMER	T	18 km E Betws-y-Coed	15 homes

itv1 - Moel-Y-Parc transmitter area*

Date	Incumbent ITV company
14th Sep 1962 to July 1964	Wales (West and North) Television (Teledu Cymru)
July 1964 to July 1968	Television Wales and the West
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 Wales.

* This Moel-Y-Parc ITV transmitter came into service on VHF 405-line on 28th Jan 1963; dates before this indicate the history of the ITV company it belonged to when Moel-Y-Parc began transmission.

405-line VHF black and white TV

From the Moel-Y-Parc transmitter, BBC One was broadcast on VHF C6. ITV was broadcast on VHF C11. In the United Kingdom, 405-line television was used from 1936-39 and 1946 until 1982-85.

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