FM to DAB upgrade

[champ222]

My appologies if this is posted in the wrong place, but ive just joint, and i have a quick question:

my uncle currently has two ariels in the loft, a tv one and an fm one.

they are then diplexed into 1 coax cable, fed to the front room where it is then connected to a TV/FM wall socket, that then goes to the TV and Tuner via two cables.

as far as i know, this has been working well for years, however he wants to upgrade to a dab tuner.

sooooo....

if he changes the fm aerial to a dab aerial, and the fm tuner to a dab reciver, can he still use the tv/fm diplexer and wall socket?

so what i need to know is, what is the frequency spectrum of dab radio? and how does it comare to FM?

Many thanks for your help

[champ222]

My appologies if this is posted in the wrong place, but ive just joint, and i have a quick question:

my uncle currently has two ariels in the loft, a tv one and an fm one.

they are then diplexed into 1 coax cable, fed to the front room where it is then connected to a TV/FM wall socket, that then goes to the TV and Tuner via two cables.

as far as i know, this has been working well for years, however he wants to upgrade to a dab tuner.

sooooo....

if he changes the fm aerial to a dab aerial, and the fm tuner to a dab reciver, can he still use the tv/fm diplexer and wall socket?

so what i need to know is, what is the frequency spectrum of dab radio? and how does it comare to FM?

Many thanks for your help

[champ222]

anyone?

[Chris Muriel]

This actually depends on the design of the diplexer.
DAB uses the old band III TV frequencies (something like 170-220 MHz).

FM analogue radio uses 88-108 MHz.

Band IV and V (UHF TV) uses something like 470-820 MHz.

From this you can work out the diplexer response that is needed.

Chris Muriel (currently in Walton on Thames, normally in Manchester)

[champ222]

anyone?

[champ222]

cool, thanks. i assume such diplexers exist?

[gerbilly]

Yes but it can sometimes be a wee bit hit and miss. You will also have to check whether you get DAB reception where you are.

[richardys]

It should be fine, my experience of UHF/VHF diplexers are that they will do 40-230MHz for the VHF.

[pentode]

From experience, my DAB tuner will not work from the FM output of an FM/UHF splitter.

I run my DAB tuner from a powered TV amp/splitter, just connected to the television aerial & this works fine !