G2 tri-band / quad-band

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Harald Welte laforge at gnumonks.org
Tue Nov 9 08:10:46 UTC 2010

On Tue, Nov 09, 2010 at 06:29:00AM +0000, Wolfgang Spraul wrote:

> I could imagine that some ICs on the G2 can do quad, but other
> components on the board (filters?) actually pick 3 of those 4?

According to the schematics it is a quad-band design.  The Antenna switch is a
SP5T (two bands tx, 3 bands rx), followed by an additional filter that
separates the 850 from the 900 in the RX path.

Given that the filters (including the 850/900) are all unbalanced-to-balanced
filters, I doubt that somebody would simply not place them (as you cannot
replace them just with a 0ohms resistor or soemthing.  By removing one filter
you would not be able to produce a standard 850/1800/1900 or 950/1800/1900
configuration but something like 850/900/1800 or 850/900/1900 which doesn't
maeke sense.

My personal educated guess is: they are all quad-band.

- Harald Welte <laforge at gnumonks.org>           http://laforge.gnumonks.org/
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