Rowridge transmitter - analogue switch-off

Rowridge 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.

For full details of the existing Freeview services on the Rowridge transmitter, please click on Rowridge Freeview transmitter.

March 2012 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 31 - - - - - - -

BBC One South, BBC Two England, ITV-1 Meridian Southampton and Channel 4 analogue switched off. It will be necessary to perform a full rescan of your Freeview box on this day.

Transmission frequencies

Before Sunday 15th November 1998

C21	C24	C27	C31
C4	BBC TWO	ITV1	BBC One

Sunday 15th November 1998 to Wednesday 25th March 2009

C21	C23-	C24	C26-	C27	C28	C30	C31	C32+	C33+
C4	Mux 1	BBC TWO	Mux C	ITV1	Mux 2	Mux A	BBC One	Mux B	Mux D

Wednesday 25th March 2009 to Thursday 1st March 2012

C21	C24	C27	C28+	C30-	C31	C32+	C33+	C34	C37+
C4	BBC TWO	ITV1	Mux B	Mux A	BBC One	Mux 2	Mux D	Mux 1	Mux C

After Friday 30th March 2012¶

C21+	C22+	C24	C25	C27	C28	C29	C30
Mux BBCB	Mux ArqA	Mux BBCA	Mux SDN	Mux D3+4	Mux ArqB	Mux NEW7	Mux NEW8

¶ NOTE: Rowridge COM multiplexes are expected to remain on their pre-switchover channel allocations (30, 37 & 33) for a short period after digital switchover NOTE: Rowridge will broadcast both horizontally and vertically polarised signals for all six multiplexes after switchover.

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 150,000 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.

After switchover an existing group A aerial will provide all digital TV services.

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
PORTSMOUTH DOCKS	T	2 km N city centre	50 homes Estimate. Group of houses'

itv1 - Rowridge transmitter area*

Date	Incumbent ITV company
30th Aug 1958 to 31st Jan 1992	Southern Television
1st Jan 1982 to 31st Dec 1992	Television South (TVS)
1st Feb 1983 to 31st Dec 1992	TV-am (breakfast)
1st Jan 1993 to date	Meridian
1st Jan 1993 to date	GMTV (breakfast)
Note	For digital switchover this region is now known as Meridian Southampton.

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

405-line VHF black and white TV

From the Rowridge transmitter, BBC One was broadcast on VHF C3. In the United Kingdom, 405-line television was used from 1936-39 and 1946 until 1982-85.

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