4phun <vic.healey@gmail.com> wrote in news:4099de52-4da8-4155-80a1-
fee50ec7b527@k30g2000hse.googlegroups.com:
> Why is that Larry? You said it doesn't have a GPS chip. Apple says it
> does BTW.
>
>
I'm asking anyone to point out, on the high resolution picture of the 3G
FruitFone board, the GPS receiver and its associated GPS processor
chips.....
We cannot find them. GPS uses specific chipsets, there are several
manufacturers. GPS is NOT A PIECE OF MAC APP CODE.
List the GPS chipset parts on that board and I'll just stop....It's very
simple....
Here is a picture of the best one made:
http://upload.wikimedia.org/wikipedi...71003_3764.jpg
The planar panels on each end are the phased array antenna system.
This is a complete, 20-channel, WAAS-compensated GPS receiver and it's
the coolest one made. It drains the battery something just AWFUL at 62
mw of power and it has a simply incredible -159 dbm receiver sensitivity
to pick up the very faint signals from the birds 16,800 miles away in
polar orbits...up to 20 at a time!
-159 dbm is a power level of .000000000000000125 milliwatts! On the
sunny side of the planet, sun-created noise radiating off a parking lot
is about 1000 times this level in broadband noise at the GPS UHF
frequency band. It is simply an amazing piece of engineering.
http://live.ifixit.com/images/QuqS4a...rOod-large.jpg
Here's the antenna PC board the gold plated spring contact on the main
board touches for a sellphone antenna....on the bottom, the worst place
under your hand....idiots.
http://live.ifixit.com/images/m2VNZs...pkSC-large.jpg
Hmm....I just found something new on the OTHER side of this board....a
coaxial connector with pads going to it on the BATTERY side. Look at
this picture. I may have to eat crow...not the first time.....(c;
In the upper part of this picture, you see a round female gold-plated
connector that is tapered so that it mates with "something". Under it
there are PC traces coming out in parallel (these may be "stripline"
impedance matching sections if there is an internal ground plane inside
the board, in the middle. Striplines are very old technology but the
best we ever had.
These two black lines come over to what LOOKS like a white parts number
sticker of some sort. I tried to find that number and it traces to
nothing....not a GPS receiver Google ever heard about...or even an IC
number anywhere on the net. There's a little row of tiny surface mount
parts above this white "sticker", which MAY be an IC under it...surface
mount. The black lines from the round cone coax connector, which may be
a connector for your GPS receiver go under the big shield cover on the
left....where there may be more circuits not yet pictured on the net.
This could very well be the connection for a planar GPS antenna in the
new plastic back...which would make it have a bulge in it like the Nokia
N810 has. The N810 uses the fantastic chipset at the top of this
message, same as my external BT GPS receiver and all other Nokia GPS
products...including their phones.
Now, using this picture:
http://live.ifixit.com/images/2a.jpg
notice, using the gold-plated antenna contact in the last picture, the
last picture is looking at the BACK of the board in this picture. I
wonder why ifixit didn't complete the disassembly they started and
remove teh shield cover from the BACK of the main board so we could look
at what is mounted on the back?! I assumed they knew what they were
doing, being hardware geeks, but, now I'm not sure they found but HALF
the new FruitFone's circuit chipsets! There has got to be other chips
mounted on the OTHER side of the board from the 2a picture here.....
Until we can see that side of the board with the brown shield cover
removed, we can't really tell what's on that side....
I'll bite....I think I just found the GPS antenna input for a GPS
chipset UNDER that shield cover on the back of the FruitFone....added on
as an afterthought, probably.
I was running on the assumption the chips on ifixit were the ONLY chips
on the board....I doubt they know this isn't all of them......well,
yet...(c;