Sundance SMT712 - Manual (Page 10)

User Manual SMT712 Last Edited: 11/12/2012 10:36:00
3 Acronyms, Abbreviations and Definitions
3.1 Acronyms and Abbreviations
PXIe : PXI Express.
SNR: Signal-to-Noise Ratio. It is expressed in dBs. It is defined as the ratio of a signal
power to the noise power corrupting the signal.
SINAD: Signal-to-Noise Ratio plus Distorsion. Same as SNR but includes harmonics
too (no DC component).
ENOB: Effective Number Of Bits. This is an alternative way of defining the Signal-to-
Noise Ratio and Distorsion Ratio (or SINAD). This means that the ADC is equivalent
to a perfect ADC of ENOB number of bits.
SFDR: Spurious-Free Dynamic Range. It indicates in dB the ratio between the powers
of the converted main signal and the greatest undesired spur.
4 Functional Description
4.1 General Block Diagram
Below is the general block diagram showing all resources available on the board.
Note that not all options are implement in the standard firmware.
Figure 1 - SMT712 General Block Diagram.
The following block diagram shows all three options. The first option (PXIe) can be
plugged into any PXI Express slot, the second (32-bit PXI) into any Hybrid PXI
Express slot and the third can go in any CPCI system.