Wideband RF Transceivers

Hi All,

I have a few questions regarding Wideband RF Transceivers.

I’m using Ubuntu 11.04.
I got L1 GPS signals by following commands.
$ sudo A2300RxToFile data1.bin freq=1575.42 path=gpsext
$ sudo A2300RxToFile data2.bin freq=1575.42 path=wideband0
$ sudo A2300RxToFile data3.bin freq=1575.42 path=wideband1

Q1: Wideband RF Transceivers are integrated 12 bit I/Q D/A, A/D converters. But I/Q samples of GPS signals have range from -32768 to 32767. Why do I/Q samples have more than 12 bit?

Q2: Signal intensity of RF0 GPS L1 external input signal (data1.bin) and RF0 Wideband input signal (data2.bin) are same. But signal intensity of RF1 Wideband input signal (data3.bin) is weak more than other signals. Why?