IIRC the original symphony HU didnt suffer from those annoying pips when your mobile travels from one cell to another.

My replacement HU does however.

Any idea how to stop this?

Jono

AFAIK, theres only two options

1) Move phone away from the stereo

2) Turn phone off

Sorry, but, its the electronics in your ICE which is suceptable to the radio interference form your phone.

Its only now that you mention it, that I realise the symphony HU is quite good in this respect, I had a Mondeo whose standard radio was extremely suceptable, and a Panasonic in dash CD player which was fairly suceptable (the wife now has this in her Ka).

If the signal is being induced into the supply lines, then ferrite cores on each supply line may help, but I have found that they didn't help, it is usually the HU itself that is suceptable.

Vince

Okey Dokey

Thanks anyway

Which mobile phone is it? I've noticed some tend to induce it more than others...

Rob.

Which mobile phone is it? I've noticed some tend to induce it more than others...

Rob.

Several reasons for this, firstly some phones may kick out more power than others - this is more than likely down to the efficiency of their antennae.

But the main reason would be the frequency on which the phone transmit, O2 and Vodafone use 900Mhz, Orange and T-Mobile use 1800Mhz, so your equipment may be more suceptable to one frequency than the other, although, since one is a multiple of the other, if you are suceptable to one, then you will be suceptable to the other more than likely.

I have found computer equipment more suceptable to 900Mhz than 1800Mhz, but hi-fi etc vary.

Vince

But the main reason would be the frequency on which the phone transmit' date=' O2 and Vodafone use 900Mhz...[/quote']

O2 use both frequencies. Most of their network is 900Mhz but they have some 1800Mhz transmitters to fill in gaps in their coverage.

The noise isn't just when you move between cells. Every so often the phone will send out a transmission that's telling the network that it's still there and switched on. It does it even when stationary.