Keysight Technologies B2900 Series User Manual

6-18 Keysight B2900 User’s Guide, Edition 5
Function Details
Math Expression
This function is effective for reducing measurement errors in low resistance
measurements.
VARALPHA Calculates varistor alpha using the following formula.
VARALPHA = log(CURR[c][1] / CURR[c][0]) / log(VOLT[c][1] / VOLT[c][0])
where, CURR[c][0] and VOLT[c][0] are the measurement data at a point on a
varistor’s non-linear I-V characteristics curve, and CURR[c][1] and VOLT[c][1] are
the data at the another point.
VOLTCOEF Calculates voltage coefficient using the following formula.
VOLTCOEF = (RES[c][1]-RES[c][0]) / (RES[c][1] * (VOLT[c][1]-VOLT[c][0]))
* 100 %
where, RES[c][0] and RES[c][1] are the resistance measurement data at the first and
second measurement points, respectively, and VOLT[c][0] and VOLT[c][1] are the
voltage measurement data at the first and second measurement points, respectively.
The voltage coefficient is known as the ratio of the fractional change for a resistor
whose resistance varies with voltage.
Resources Used in the Expressions
The following resources can be used in user-defined math expressions.
• Reserved variables
The variables listed in Table 6-2 are reserved for reading the channel output or
measurement data.
Scalar variable is used for spot measurement data.
Vector (array) variable is used for sweep measurement data.
• Math operators
The following operators are available.
• Arithmetic operators: +, -, *, /, ^, see Table 6-3
• Elementary functions: ln, log, sin, cos, tan, exp
The functions log and ln perform the operation after calculating the absolute
value. So if a negative value is specified, they do not cause an error but calculate
as a positive value. For example, log(-10) results in log(10)=1.

Keysight Technologies B2900 Series Specifications

General

Type	Precision Source/Measure Unit (SMU)
Voltage Range	±210 V
Display	4.3-inch color LCD
Minimum Voltage	100 nV
Minimum Current	10 fA
Current Resolution	10 fA
Voltage Resolution	100 nV
Connectivity	GPIB, USB, LAN
Programming Languages	SCPI
Compliance	LXI
Model Series	B2900 Series
Channels	Single-channel and dual-channel models available

Summary

Getting Started

Turning B2900 on

Procedure for connecting the power cord and powering on the instrument.

Applying DC Output

Procedure for configuring B2900 as a voltage source and applying a voltage.

Performing Spot Measurement

Procedure for performing a single-point current measurement.

Performing Sweep Measurement

Procedure for applying staircase sweep voltage and measuring current.

Introduction

Keysight B2900 Series

Overview of the B2900 SMU product lineup, capabilities, and specifications.

Front View

Description of the instrument's front panel controls, keys, and display.

Software and Drivers

Information on PC software, web interface, and drivers for instrument control.

Installation

Inspecting the Shipment

Procedure for inspecting the instrument and accessories for shipping damage.

Installing the Keysight B2900

Key considerations and steps for physically installing the B2900 instrument.

Connecting a DUT

Guide on how to connect a device under test to the instrument's terminals.

Connecting to the Interfaces

Instructions for connecting the instrument via GPIB, USB, and LAN interfaces.

Front Panel Reference

Hard Keys and Rotary Knob

Explanation of the function of the instrument's physical keys and rotary knob.

Display and Assist Keys

Details on display modes and the associated softkeys and assist keys.

System key group

Overview of system setup functions like error handling, reset, calibration.

Front Panel Operations

Basic Operations

Fundamental operations for navigating and changing settings on the instrument.

To Set Source Output

Procedures for configuring and controlling the source output parameters.

To Execute Measurement

Procedures for performing various measurement tasks on the instrument.

Function Details

Limit/Compliance

Explanation of output limiters for preventing device damage from over/under voltage/current.

Trigger System

Description of the ARM-TRIGGER model and its operation.

Initial Settings

Details on the default system and SMU initial settings for power-on and reset.