Mio P350 - tomtom5 - cant get good signal

woodyuk · Occasional Visitor Joined: Sep 13, 2006 Posts: 11

Hi
I have a Mio P350 with tomtom5 but cant get a good signal .( outdoor clear sky ) says on for a short while then comes back on then off again Crying or Very sad

someone said that the GPS may have to be reset or that tomtom software settings may be corruped

Does anyone know how to do a reset the GPS or what i can do to get a stronger signal

The Spec says

SiRF Star III for fast, accurate positioning
The highly sensitive SirfStar III GPS chipset meanwhile, can receive signals from up to 20 satellites for extremely accurate positioning

Lucky to get 2-4 Sad

Any help would be appreciated

Cheers

Border_Collie · Posted: Fri Sep 29, 2006 10:24 pm Post subject:

Goto Start - Settings -System. Tap on GPS. GPS Program Port should be COM4. Tap on Hardware tab should read COM2 Baud Rate 4800.

Return to Today screen. Start TomTom. Tap on bars bottom right of screen. Tap on large white rectangle on right. Tap on Configure.

Select Other NMEA - GPS Baud Rate 4800 - GPS_COM
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woodyuk · Occasional Visitor Joined: Sep 13, 2006 Posts: 11

Thanks Lost_Property

My Mio is setup using those settings.

the problem in tomtom is that i get one/two bars signal strenght but after about 10/20 sec it loses the signal and goes blank , then 20/30 sec i get another signal for a few seconds before it loses it again, if seems to lock on and off the sats rather than holding the signal

Any Ideas why

Cheers

Border_Collie · Posted: Fri Sep 29, 2006 11:24 pm Post subject:

You could try checking with WinCEMonitor which you can get from http://www.pocketgpsworld.com/winfastnavigatorppc.php or the latest version from here http://www.leadtek.nl/nts/uk/products/gps/index.php?tab=3&sid=1&step3=yes&pronameid=243&item='Graphic%20Cards'&dl_id=147&dl=4&ml_id=75&ml=1
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Border_Collie · Posted: Fri Sep 29, 2006 11:34 pm Post subject:

As an afterthought, have you downloaded the update to TTN5.210 (5430) from the TomTom site?
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woodyuk · Occasional Visitor Joined: Sep 13, 2006 Posts: 11

Downloaded WinFast Navigator and did the resets and can get an average fix of 7 sats
Dissconected and then started Tomtom , but still the same problem of losing the signal

In Tomtom GPS Status reset the configaration but still no improvements

Now to make it all more confusing , yesterday my Holux GPS Antenna from ebay arrived , plug it in and signal in Tomtom GPS status improved from 1/4 to 3/4 strenght and more sats , great I thought
BUT Crying or Very sad

after a minutes the signal goes dead , have to unplug the Holux and back again and its fine for another few minutes then its gone again

So now i am really ***** by the whole thing , all i want is for it to work for more than a few minutes

the spec for the Holux is
Frequency : 1575MHz ? 10 MHz
Input Voltage: 2 ~ 5 VDC
Input Current: 6mA, @ 3V input
Antenna Type: PATCH
VSWR: 2:1
Polarization: Circular (RH)
Impedance: 50 ohms
Azimuth Coverage: 360 degrees.
Elevation Coverage: 5~90 degrees.
Coaxial cable : RG-174, 2M or 5M
Connector : SMA or MCX or MMCX
Dimension: 43.5 ?34.8 ?13.9 mm
Operating Temperature: -40 ~ +80 ?
Storage Temperature: -40 ~ +90 ?
Operating Humidity: 5% ~ 95%
Mount: Magnetic
Max. Gain : 29dB (21dB@2V, 26dB@3V, 29dB@5V)

Border_Collie · Posted: Sun Oct 01, 2006 7:18 pm Post subject:

Sometimes it's best to go back to square one rather than going round in circles. Try......

Start - Settings - System - SysInfo - Clean Boot. Tap Start to begin clean boot.

When finished switch device off with slider at bottom. Leave it a couple of hours then switch back on and re-set your settings.

Download TTN5.21 from TT site and install. Format your SD Card and re-load maps via a Card reader.

Now see if there is an improvement. If not I would guess you have a faulty unit.

If there is an improvement try re-setting NMEA with Winfast to
GGA 1, GLL 1, GSA 1, GSV 5, VTG 1, MSS 0, User 0, User 1, User 0.
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pmadd2000 · Occasional Visitor Joined: May 02, 2006 Posts: 1

Hi Woody,
Having probably been one of the only happy Mio A201 TomTom users, I have since bought my daughter a P350.

However... not so happy now Sad

I am having the same issues as you appear to have. The unit takes ages to lock onto very few satellites and the signal is very poor and easily lost. All the hardware settings are correct and I know the TTN 5.21 is OK as it works great in my A201.

I wondered if you fianlly managed to resolve your problems? If so please advise what worked.

Cheers

Border_Collie · Posted: Fri Oct 06, 2006 12:46 am Post subject:

The problems you are having appear to be very much like those on some of the P550's where it was found there was a fault with a batch of units and they had to be returned for repair/exchange. I wonder if there is a batch of P350's with a similar problem.
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