Hello,
I am working with the USRP-2954 and trying to understand the exact ADC model and its bit-level representation in LabVIEW.
I have disassembled the device but could not identify the specific ADC model. I have the following questions:
1) What is the exact ADC model used in the USRP-2954?
I attempted to check the hardware directly but could not find the ADC part number.
If possible, could you provide the manufacturer and model number of the ADC used in this device?
2) Bit Resolution and Quantization Step Size Discrepancy
In LabVIEW, the received signal amplitude is mapped between -1 to 1.
When analyzing the quantization step size, I found it to be around 10⁻¹⁵, which suggests a 16-bit quantization.
However, according to the NI website, the ADC resolution for Rx in USRP-2954 is 14-bit.
Why is there a difference between the expected 14-bit resolution and the observed 16-bit quantization behavior?
3) Bit Representation and Folding in ADC Processing
I noticed that when the received signal magnitude exceeds ±1, the value folds over (wraps around).
This suggests that an additional bit might be involved in processing the folding.
How can I determine how the ADC handles folding and quantization in bit sequences?
Specifically, is the folding behavior related to the MSB or LSB?
Is there any documentation on the bit-level representation of ADC output for this device?
Any insights or references would be greatly appreciated.
Thank you!
