Garmins with Built-in Traffic Receiver

Guivre46

Sorry for the duplication, but can't find the post where this was mentioned. Is it models ending with a 9 that have the receiver in the device, as opposed to in the power cable?
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sussamb · Posted: Thu Aug 28, 2014 1:07 pm Post subject:

The latest ones ending in 8 certainly do. I'm unclear which others do.

BigJohnD · Posted: Thu Aug 28, 2014 3:27 pm Post subject:

Nuvi 2569LMT-D and 2599LMT-D have Digital traffic info.

The 2599LMT-D also has a Bluetooth link.

There's a good list here: http://www.satnav-discounts.co.uk/gps/products/latest-nuvi-models/

Guivre46 · Posted: Thu Aug 28, 2014 5:40 pm Post subject:

Thanks. Have a Currys and a Halfords moreorless side-by-side.
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Mike R [aka Wyvern46]
Go 530T - unsupported
Go550 Live [not renewed]
Kia In-dash Tomtom

Kremmen · Posted: Fri Aug 29, 2014 4:59 am Post subject:

Be aware though that the built in traffic receiver still needs the appropriate power cable draped across the dash as this is the receiver aerial/antenna.

All that has changed is that the older units had the receiver as a sort of 'blob' on the power cable, now moved inside the unit.

Why they don't include a small stubby aerial on the unit itself so the cable can be hidden away ?
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sussamb · Posted: Fri Aug 29, 2014 6:58 am Post subject:

Never bothered me that the cable's on view. Having a 'stubby antenna' would cause mounting problems I suspect.

BigJohnD · Posted: Fri Aug 29, 2014 2:43 pm Post subject:

The cable is a bit thicker than average, and perhaps a bit longer, but is no more unsightly or inconvenient than any other sat nav power cable.

BigJohnD · Posted: Fri Aug 29, 2014 3:08 pm Post subject:

jonial · Posted: Fri Aug 29, 2014 3:30 pm Post subject:

Interesting thread.
I have the external digital receiver and use an external antenna plugged into the external antenna socket on the "Blob" which allows me to hide the thick power / Antenna lead.
Can anyone say if the "built in" receiver has a socket for the connexion of an external antenna?
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sussamb · Posted: Fri Aug 29, 2014 3:53 pm Post subject:

It doesn't, but as it's getting its signal via DAB rather than FM it doesn't need one.

jonial · Posted: Fri Aug 29, 2014 4:11 pm Post subject:

Thanks Sussamb
As far as I know the GTM70 is a DAB receiver not FM as the GTM36 is.
The traffic reports I get are far far superior to the GTM36.
I just thought that if the the new units had a socket for the Garmin external antenna then the antenna / power cable could be hidden within the dashboard.
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sussamb · Posted: Fri Aug 29, 2014 4:37 pm Post subject:

It is digital AFAIK. Why it has the external antenna is anyones guess ...

jonial · Posted: Fri Aug 29, 2014 7:25 pm Post subject:

Are we confusing Mobile internet data with terrestial broadcast data.
I ask because both FM Radio and DAB radio are actual broadcasts and as such any receiver needs an satisfactory antenna to work - hence the facility to connect an external antenna to the GTM36 and GTM70.
If the built-in receivers are using the mobile phone network then the receiver will have a suitable built in antenna.
I think we are getting a bit deep now !!
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M8TJT · Posted: Fri Aug 29, 2014 9:10 pm Post subject:

sussamb · Posted: Fri Aug 29, 2014 10:21 pm Post subject:

Getting deeper ...

DAB frequencies are higher than FM frequencies. Higher the frequency the shorter the wavelength so the shorter the antenna required. FM traffic in UK often needs the additional aerial plugged into the 'box' on the combined power/antenna cable. DAB traffic shouldn't need that.

I suspect (though don't know) that the early DAB 'cables' were simply the older 'form factor' of FM cables, simply to reduce cost. Now receivers are included within the GPS there is no need for anything other than a simple power cable/antenna.

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