dab interference

[pilli640]

Hi,

I know I'm new on here but appreciate any help that can be given.

I have a Pioneer DAB unit in my car and have tried various different Ariel's but am failing to get a stable signal on non BBC dab channels

I am wondering if there is any thing in these old cars that could affect the signal.

Info if needed

Ariel's I have tried

Calereo shark 2 DAB/DAB+ Current test - roof mounted

Calereo Bee sting ariel - returned - roof mounted

Halfords mag mount

Window screen  mounted

Also tried mates DAB unit incase mine had a fault

Car audio info

Pioneer AVH-X5700DAB

HERTZ MILLE PRO fronts

JL AUDIO twin 12" sub and 1000D amp

Rainbow Ipaul 4 channel amp for fronts.

Audisson cables throughout

Mesurements

Phantom power - 12v

If trying off the Stereo live 12v measured