Agilent Technologies Agilent E5250A Manual do Utilizador descarregar pdf (Página 7)

A condition to stop the sampling can

be defined.

Sampling interval setting accuracy

(supplemental data):

0.5% + 10µs (sampling interval £480µs)

0.5% + 10µs (480µs £sampling

interval <2ms)

0.5% + 100µs (2ms £sampling interval)

C-V Measurement

Characteristics

Capacitance is a calculated value

derived from the following equation:

C =

DQ is the change in charge when DV,

the step voltage, is applied by the SMU;

DQ is derived from the measurement

current (amps) and the integration time

(seconds).

Maximum Measurable Value

Maximum measurable value depends

on thecurrent range, integration time,

and step voltage (refer to the chart in

supplemental data).

Capacitance Calculation Accuracy

Accuracy is dependent on accuracy of

the current measurement and voltage

measurement and the stray capacitance

and leakage current of measurement

path, etc. (Refer to the chart in supple-

mental data).

Zero Offset

Cancels stray capacitance of the

fixtures and test leads.

Leakage Current Compensation

Cancels the influence of the leakage

current to the capacitance measurement.

Stress Force Characteristics

SMU, VSU, and PGU output can be

forced for the user specified period.

Stress time set range: 500µs to

31,536,000s (365 days)

Resolution:

100µs (500µs £stress time £10s)

10ms (10s <stress time £31,536,000s)

Burst pulse count: 1 - 65,535 (PGU only)

Trigger: The 4155C and 4156C output a

gate trigger while stress channels are

forcing stress.

Knob Sweep

In knob sweep mode, sweep range is

controlled instantaneously with the

front-panel rotary knob. Only the

Channel Definition page need be defined.

Standby Mode

SMUs in “Standby” remain programmed

to their specified output value even

as other units are reset for the next

measurement.

Other Characteristics

Measurement Control: Single, append,

repeat, and stop

Stress Control: Stress force and stop

SMU Setting Capabilities: Limited auto-

ranging, voltage/current compliance,

power compliance, automatic sweep

abort functions, self-test, and self-

calibration.

Arithmetic and Analysis

Functions

Arithmetic Functions

User Functions

Up to six USER FUNCTIONS can be

defined using arithmetic expressions.

Measured data and analyzed variables

from graphics analysis (marker, cursor,

and line data) can be used in the

computation. The results can be

displayed on the LCD.

Arithmetic Operators

+, -, *, /, ^, LGT (logarithm, base 10),

LOG (logarithm, base e), EXP

(exponent), DELTA, DIFF (differential),

INTEG (integration), MAVG (moving

average), SQRT, ABS (absolute value),

MAX, MIN, AVG (averaging), COND

(conditional evaluation).

Physical Constants

Keyboard constants are stored in

memory as follows:

q:Electron Charge, 1.602177 E-19 C

k:Boltzman’s Constant, 1.380658 E-23

e (e): Dielectric Constant of Vacuum,

8.854188 E-12

Engineering Units

The following unit symbols are also

available on the keyboard: f (10

-15

p (10

-12

), n (10

-9

), u or m (10

-6

m (10

-3

), K (10

), M (10

), G (10

)

Analysis Capabilities

Overlay Graph Comparison

A graphics plot can be stored and later

recalled as an overlay plane. Four over-

lay planes can be stored. One plane can

be overlaid onto the current data.

Marker

Marker to min/max, interpolation,

direct marker, and marker slip

Cursor

Long and short, direct cursor.

Line

Two lines, normal mode, grad mode,

tangent mode, and regression mode.

Scaling

Auto scale and zoom.

Data Variable Display

Up to two user defined parameters can

be displayed on the graphics screen.

Read Out Function

The read out functions are built-in

functions for reading various values

related to the marker, cursor, or line.

Automatic Analysis Function

On a graphics plot, the markers and

lines can be automatically located using

the auto analysis setup. Parameters can

be automatically determined using

automatic analysis, user function, and

read out functions.

User Variable

Display the data on the LCD via GPIB

or instrument BASIC.

Output

Display

Display Modes

Graphics and list.

Graphics Display

X-Y or X-Y1/Y2 plot of source current/

voltage, measured current/voltage, time,

or calculated USER FUNCTION data.

List Display

Measurement data and calculated

USER FUNCTION data are listed in

conjunction with VAR1 step number or

time domain sampling step number. Up

to eight data sets can be displayed.

Display

8.4-inch diagonal color active matrix

LCD, 640 dot (H) ´ 480 dot (V). More

than 99.99% of the pixels on an LCD

are active.

Hard Copy Functions

Graphics Hard Copy

Measured data and all data appearing

on the LCD can be output via GPIB,

parallel printer port, or network

interface to supported HP plotters or

printers. PCL, HR PCL (high-resolution

PCL), and HP-GL formats are sup-

ported (selectable).

Text Hard Copy

Print out setup information or mea-

sured data list as ASCII text via GPIB,

parallel printer port, or network

interface to supported HP plotters or

printers. PCL, HR PCL, and HP GL

formats are supported (selectable).

Hard Copy File

Hard copy output can be stored to an

internal or external mass storage

device instead of sending it to a printer

or plotter. The data can be stored in

PCL, HR PCL, TIFF, HR TIFF (high-

resolution TIFF), or HP GL formats.

Hard Copy via Network Interface

The network interface has lpr client

capability.

High-Resolution (HR) Mode

This file mode is available for cases

where an extremely clean print-out or

plot is desired.

Note: High-resolution mode takes significantly

greater CPU time to generate, so its use is

recommended for final reports only.

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