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Hi Jim, and all,<br>
<br>
I've tested this several times and confirmed the behavior. It's
definitely not power. Today I tested this as follows with the tablet
running on battery power.<br>
<br>
I start the tablet on battery power and run a program called GPS test.
I get a nice clean fix on 5 - 6 satellites, a positional accuracy of 15
ft or so, and SNR values in the 26 - 31 range (this program doesn't
specify the units). Those satellites are color coded in yellow by this
program. I have a podcast playing in the background on the tablet's
internal speakers. I have the fm transmitter plugged into the
cigarette lighter but the AUDIO cable is not plugged into the tablet.
So, sound is coming from the tablet's speakers, and nothing is coming
from the car's speakers. Everything is fine. GPS works.<br>
<br>
I plug the AUDIO cable in from the FM transmitter into the tablet's
headphone jack. Sound starts coming out of the car's speakers, as it
should. Immediately, SNR's for the satellites drop below 20,
satellites with a fix drop to 0 - 1, and the position fix is lost.
I've confirmed this several times. It is exceedingly strange.<br>
<br>
I've officially fired the FM transmitter. I don't think I have the
packaging to take it back to Fry's. It's a NAXA NA-3029 if anyone's
interested. I'd recommend avoiding this unit.<br>
<br>
I've gone back to my old method. I have a boom box with aux input
sitting in the seat, and I run a wire from the tablet to the boom box.
Messy, but it works.<br>
<br>
Sincerely,<br>
<br>
Ron<br>
<br>
<br>
<br>
On 5/1/2012 8:19 AM, Jim Kinney wrote:
<blockquote
cite="mid:CAEo=5PxE6h_G5WRNbof6Oz=DmEqU+mrFpaK23ggNgoDzko-HfQ@mail.gmail.com"
type="cite">
<div class="gmail_extra">that sounds more like an internal power
issue. The device draws more power on a bus that is available for both
the gps and it to run to gps falls down.<br>
<br>
To see if it's actually radio interference, check you cell phone gps
next to it and see if it also chokes.<br>
<br>
<div class="gmail_quote">On Tue, May 1, 2012 at 12:20 AM, Ron Frazier
(ALE) <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:atllinuxenthinfo@techstarship.com" target="_blank">atllinuxenthinfo@techstarship.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">I
have one of those cheap fm transmitters that broadcasts audio from a<br>
portable device to the car stereo. It works great to send sound from my<br>
tablet to the car. However, it also jams the tablet's GPS system. When<br>
I plug in the transmitter, the number of satellites the tablet has a fix<br>
on goes from 6 or more to 1 or zero immediately. The GPS fails to<br>
work. If I unplug the fm transmitter, the GPS works again. Anyone ever<br>
seen that happen?<br>
<br>
Ron<br>
<br>
</blockquote>
</div>
</div>
</blockquote>
<br>
<br>
<br>
<pre class="moz-signature" cols="72">--
(To whom it may concern. My email address has changed. Replying to former
messages prior to 03/31/12 with my personal address will go to the wrong
address. Please send all personal correspondence to the new address.)
(PS - If you email me and don't get a quick response, you might want to
call on the phone. I get about 300 emails per day from alternate energy
mailing lists and such. I don't always see new messages very quickly.)
Ron Frazier
770-205-9422 (O) Leave a message.
linuxdude AT techstarship.com</pre>
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