Hello,
I will rephrase former question.
When using the XCVR2450, up to 92dB gain in rx mode is allowed.
However this gain is shared between to places. Gain at RF and then gain
at
baseband (after the mixing)
It is very important (from the point of view of the Noise Figure) how
gain
is shared.
There is a register B7 to B1 which control the gain to the MAX2829 chip
placed inside the XCVR2450.
The first 2 bits are critical since they define 3 states: High gain
(11),
Medium gain(10) and Low gain (0X)
I would like to know how the overal gain configunation setting (0-92 dB)
is
shared between theses two places and what the limits to be in high,
medium
and low gain state are.
Where I can find it?
Many thanks,
Jorge
I would like to know how the gain setting (up to 92 dB in Rx mode) of
the
MAXIM2829 is sorted between the two amplifiers placed around the mixer.
I is clear in the data sheet what the total gain is depending on the
gain
settings but it is not clear where the gain is. Most of them can be
before
the mixer (RF gain), or after the mixing (BB gain)…Is it possible
to
find it out? I would like to model this receiver.
Many thanks,
Jorge.