Glossary

ADC

Analog to digital converter

ALC

Automatic leveling control

API

Application Programming Interface

BBG

Baseband generator

BER

Bit error rate

A measure of transmission accuracy; the ratio of bits received in error to bits sent.

capture

Data streaming to the PC from a DUT

In capture mode, the PC receives data from a DUT via an N5102A digital signal interface module. The  IQ baseband data streams into the N5101A PCI card's DRAM, and can either be played to the 89601A VSA software or saved to the PC's hard disk drive. See also streaming and playback.

CLR

Common language runtime

CLR is the execution engine for .NET Framework applications.

CLS

Common language specification

The CLS is a subset of the .NET common type system, a set of constructs and constraints to guide library writers and compiler writers that allows libraries to be fully usable from any language supporting the CLS, and for those languages to integrate with each other.

CTS

Common type system

The CTS is a rich type system, built into the .NET common language runtime (CLR), that supports the types and operations found in most programming languages.

DAC

Digital to analog converter

dB

Decibels

dBm

Decibels relative to 1 mW

DHCP

Dynamic host configuration protocol

DRAM

Dynamic random access memory

DUT

Device under test

FIR

Finite impulse response

GPIB

General purpose interface bus

GPIO

General purpose input output

HDD

Hard disk drive

hybrid

Containing digital and analog signal processing circuitry

LAN

Local area network

license file

A file that enables a specific equipment configuration to run a given Baseband Studio application

LVDS

Low-voltage differential signaling

MSIL

Microsoft® intermediate language

MSIL is the CPU-independent instructions set into which .NET Framework programs are compiled. It contains instructions for loading, storing, initializing, and calling methods and objects.

offset binary

A method for representing data as a signed number (more information)

Using binary code, half of the largest possible number is assigned as the zero value. A positive integer is the absolute value added to the zero number and a negative integer is subtracted. Offset binary is popular in A/D and D/A conversions, but it is awkward for arithmetic computation.

PC

Personal computer

In this case, the PC is the host computer where the N5101A PCI card and N5110B Baseband Studio for waveform capture and playback software resides.

PCI

Peripheral Component Interconnect

A bus interface that is standard on most PC's.

playback

Data streaming to a DUT from the PC

In playback mode, captured or user-created data streams from the PC to a DUT via an N5102A digital signal interface module or an ESG/PSG. See also streaming and capture.

sampling

The process of selecting regularly spaced points in time in which to record the level of a signal

SMB

Subminiature coaxial connectors that reside on the N5101A PCI card's GPIO bracket

streaming

Continuous data transfer

Streaming is a technique for transferring data such that it can be processed as a steady, continuous stream. Streaming allows data to be delivered as a continuous flow, with minimal delay before it can be used. See also playback and capture.

two's complement

A method for representing data as a signed number (more information)

Using two's complement, Positive two's complement numbers are represented as simple binary. Negative two's complement numbers are represented as the binary number that when added to a positive number of the same magnitude equals zero.

To calculate the 2's complement of an integer, invert the binary equivalent of the number by changing all of the ones to zeroes and all of the zeroes to ones, and then add one.

upsampling

The process of increasing the sampling rate (frequency) of a signal by an integer factor

VSA

Vector signal analyzer