Following the completion of digital switchover in neighbouring Kent on the 27th June, Freeview viewers in Suffolk and North Essex, receiving from the Sudbury transmitter and viewers in coastal areas receiving from some of Sudbury's relays will need to retune once more.
Currently, some services in the area are transmitted on temporary frequencies at low power until Kent's analogue switch off frees up frequencies that can be used for full power transmissions in Suffolk and Essex.
Viewers receiving from Sudbury will have the following changes:
All commercial services will move to new frequencies. From the 27th June 2012, the following UHF channels will be used:
BBC-A (PSB1) 44
D3&4 (PSB2) 41
BBC-B^ (PSB3) 47
SDN (COM4) 58
Arqiva A (COM5) 60-
Arqiva A (COM5) 60-
Arqiva B (COM6) 56
^ HD multiplex. Reception only possible using devices with DVB-T2 tuners only.
See multiplex information at the foot of this article for more information about which TV services are on which multiplex.
The PSB (Public Service Broadcasters) multiplexes will continue to operate as a single frequency network (SFN) with the new transmitter at Rouncefall near Wickford, which aims to provide parts of South Essex with better access to the regional TV services covering the Anglia region.
In addition, there will be numerous changes at relay sites, mostly transferring services to frequencies that Sudbury transmitter had been forced to temporarily use and in some cases moving away from frequencies required in Kent for post-switchover transmissions. The retunes will also clear the part of the UHF frequency band to be reused for 4G/LTE mobile broadband from as early as next year.
- Burnham on Crouch - BBC-A moves from UHF channel 48 to 49 and given a power boost; D3&4 on UHF channel 52 is given a power boost only; BBC-B moves from UHF channel 51 to 42 and is given a power boost.
- Clacton - BBC-A moves from UHF channel 48 to 49
- Felixstowe - BBC-A moves from UHF channel 52 to 45.
- Woodbridge - BBC-A clears the 800 MHz band to be used by 4G mobile broadband, by moving from UHF channel 64 to 52; BBC-B moves from 57 to 54.
- Wivenhoe Park - BBC-A clears the 800 MHz band to be used by 4G mobile broadband, by moving from UHF channel 64 to 54; BBC-B moves from 48 to 49.
In the case of Clacton and Burnham on Crouch, the recently introduced relays provide access to local TV services, as opposed to the London based versions available from Crystal Palace which overlap into this area. During certain atmospheric conditions, reception from these sites will be more reliable.
BBC A: The BBC's standard definition TV multiplex, carrying BBC One, Two, etc
D3&4: ITV/C4/C5 also including ITV2, More 4 and E4
BBC B: The Freeview HD multiplex.
SDN: Commercial multiplex. Broadcast from main transmitter sites only. Contains ITV3, 5*, Quest, QVC among others.
ARQ A: Commercial multiplex. Broadcast from main transmitter sites only. Contains Sky News, Dave, Challenge among others.
ARQ B: Commercial multiplex. Broadcast from main transmitter sites only. Contains Film 4, VIVA, 4 Music, ITV4 among others.