Bits per sample

GNU Radio
1

hi all,

just a quick question:

How can I set how many bits are used to represent each sample’s
amplitude within the USRP?

thanks

vincenzo

2

Vincenzo P. wrote:

hi all,

just a quick question:

How can I set how many bits are used to represent each sample’s
amplitude within the USRP?

The ADCs are 12 bits and the DACs are 14 bits. All internal processing
is done at 16 bits or wider. Samples over the USB bus are either 8 or
(usually) 16 bits.

Matt

3

Thanks Matt,
but what I would like to do is to control how many bits per sample are
used (possibly at the python level) in order to afford (over the USB2
bus) sampling frequencies larger then 8 Complex Msps.

The aim is to digitize a band wider than 8MHz.

Thanks again

vincenzo

4

Vincenzo P. wrote:

Thanks Matt,
but what I would like to do is to control how many bits per sample are
used (possibly at the python level) in order to afford (over the USB2
bus) sampling frequencies larger then 8 Complex Msps.

The aim is to digitize a band wider than 8MHz.

We already have a mode which does 8-bit samples over the bus, which
gives 16 complex Msps, for 16 MHz of BW.

Matt