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UK Digital Terrestrial Television Transmitter Frequency and Site Data

This page contains details of the technical parameters for digital terrestrial television transmitter allocations in the UK.

The data is in spreadsheet (Microsoft Excel or CSV) format and is intended for ease of download and further manipulation, rather than for presentation.

Complete Frequency Data (Microsoft Excel Workbook)
Date last updated 30|10|2013

National Multiplexes (CSV)
Date last updated 30|10|2013

Non-National Multiplexes (CSV)
Date last updated 30|10|2013

A glossary containing explanations of the column headings is provided below.

This data will be updated from time-to-time to correct any errors and to reflect future changes to the networks. Please notify significant errors or omissions by email to broadcast.technical@ofcom.org.uk.

Disclaimer: While every reasonable effort is made to ensure that the information provided in these documents is accurate, no guarantees for the currency or accuracy of information are or can be made. The information contained in these documents is provided without any representation or endorsement made and without warranty of any kind, whether express or implied.


ITV Region - DSO: The licensed Channel 3 (ITV, STV or UTV) region of the site, used in the digital switchover (DSO) programme

ITV Regional News Service: The Channel 3 (ITV, STV or UTV) regional or sub-regional service news service carried by this transmitter.

BBC Region: The BBC regional or sub-regional service carried by this transmitter.

Transmitter Group: A group of sites comprising a Primary Transmitter and its dependent relays.

Site Number: Reference number for the site.

Site Name: The transmitter site name. In some cases this name may not exactly match the site name used in other sources of DTT transmitter information (see Alternative Form' below)

Alternative Form: In cases where other sources of transmitter information (for example international coordination agreements) contain site names which differ in spelling or punctuation from the Site Name above, the alternative form(s) are provided here. The list of Alternative Forms is not exhaustive.

Primary Transmitter? Indicates whether the site is the Primary Transmitter within its Transmitter Group: 1 = Yes; 0= No.

GBNGR: Alpha-numeric Ordnance Survey (GB) National Grid Reference for the site.

GBNGRX / GBNGRY: Numeric Ordnance Survey (GB) National Grid Reference Easting / Northing for the site.

IrishGR: Alpha-numeric Irish Grid Reference for sites situated in Northern Ireland, prefixed by I'. Locations for sites in Northern Ireland are also provided as extended GB National Grid References.

IrishGRX / IrishGRY: Numeric Irish Grid Reference Easting / Northing for sites situated in Northern Ireland.

Site Height: The terrain height of the transmitter location in metres above ordnance datum (mean sea level)

Average Antenna Height: The mean height of the antenna/s above ground level (AGL).

For each multiplex (see below) the following data is provided

Channel: The UHF channel of the service. The centre frequency, Fc (in Megahertz) of the multiplex can be calculated using Fc=8n+306, where n is the UHF channel number.

Offset: A + or - indicates that the frequency is offset by +0.167MHz or -0.167MHz with respect to the channel centre.

ERP: The Effective Radiated Power of the multiplex, in kilowatts (kW)


Multiplex DesignationMultiplex Name OperatorTransmission Mode
National Multiplexes:
PSB1BBC ABBC DVB-T: 64 QAM, code rate 2/3, 8K FFT
PSB2D3&4Digital 3 & 4DVB-T: 64 QAM, code rate 2/3, 8K FFT
PSB3BBC BBBCDVB-T2: 256 QAM, code rate 2/3, 32K FFT
COM4SDNSDNDVB-T: 64 QAM, code rate 3/4, 8K FFT
COM5Arqiva AArqivaDVB-T: 64-QAM, code rate 3/4, 8K FFT
COM6Arqiva BArqivaDVB-T: 64-QAM, code rate 3/4, 8K FFT
Non-National Multiplexes:
NIMuxNorthern Ireland MultiplexMultiplex Broadcasting Services N.I. Ltd.DVB-T2: QPSK, code rate 2/3, 32K FFT
GIMuxGeographically Interleaved Spectrum Multiplexes (Manchester & Cardiff)Canis Media (Manchester)
Cube Interactive (Cardiff)
At licensees' discretion. Cardiff allocation not currently in use.
LTVMuxLocal TV MultiplexComux UK Ltd.DVB-T: QPSK, code rate 3/4, 8K FFT (provisional)

Aerial Group: Suggested aerial group for reception of the 3 PSB multiplexes (and the 3 COM multiplexes, where broadcast) from this transmitter:

Aerial GroupChannelsColour Code
A21-37 Red

Polarisation: Indicates whether the multiplexes from this site are horizontally (H) or vertically (V) polarised.

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