User`s guide
Table Of Contents
- User’s Guide
- 1 Getting Started
- 2 Introduction
- 3 Installation
- 4 Using EasyEXPERT
- 5 Classic Test Definition
- I/V Sweep
- Multi Channel I/V Sweep
- I/V List Sweep
- I/V-t Sampling
- C-V Sweep
- Direct Control
- Function Setup
- Auto Analysis Setup
- Display Setup
- SMU Range Setup Window
- ADC and Integration Time Setup Window
- Advanced Setup Window
- CMU Range Setup Window
- Advanced Setup Window for C-V Sweep
- Switching Matrix Control
- SPGU Control
- SPGU Pulse Setup Window
- Load Z Setup Window
- Pulse Switch Setup Window
- SPGU ALWG Setup Window
- Define ALWG Waveform Window
- 6 Application Test Definition
- 7 Function Details
- I/V Sweep Measurement
- Multi Channel I/V Sweep Measurement
- I/V-t Sampling Measurement
- C-V Sweep Measurement
- SPGU Module
- Sweep Abort Function
- Standby Function
- Bias Hold Function
- Current Offset Cancel
- SMU CMU Unify Unit
- Atto Sense and Switch Unit
- SMU/PG Selector
- SMU Ranging Mode
- SMU Compliance
- SMU Pulse
- SMU Measurement Time
- SMU Filter
- SMU Series Resistor
- Interlock Function
- Auto Power Off Function
- Initial Settings
- 8 Built-in Programming Tool
- 9 If You Have a Problem
- When You Operate B1500A
- When You Perform Measurement
- Measurement Takes More Time than Specified
- Noise Affects the Measured Values
- Voltage Measurement Error is Large
- SMU Oscillates for High-Frequency Device Measurements
- SMU Oscillates for Negative Resistance Measurements
- Large Current Causes High Temperature (Thermal Drift)
- Measurement Damages the Device under Test
- Leaving Connections Damages Devices after Measurement
- Unexpected Sampling Measurement Data is Returned
- MFCMU Causes Unbalance Condition
- Before Shipping to Service Center
- Data Backup and Recovery
- B1500A System Recovery
- Updating EasyEXPERT
- Error Codes
- 10 Application Library and Utilities
7- 42 Agilent B1500 User’s Guide, Edition 7
Function Details
Current Offset Cancel
Current Offset Cancel
This function subtracts the offset current from the current measurement raw data,
and returns the result as the measurement data. This function is used to compensate
the error factor (offset current) caused by the measurement path such as the
measurement cables, manipulators, or probe card.
The offset cancel is not available for measurement over 100 nA range. For 10 nA
range measur
ement, the offset cancel is performed by using the 1 nA range offset
value. For measurement by a range less than 10 nA, the offset value measured by
each range is used. See Table 7-7 for the effective measurement ran
ge, the allowable
offs
et value, and the module type of the measurement channel.
Enabling offset
c
ancel func
tion
You can perform the offset current measurement and enable the offset cancel
function as shown below.
1. Click the Calibration button on the main screen to open the Calibration window.
See “Calibration” on page 4-35.
2. Specify the channels to perform the offset current measurement on
the SMU
Zero Cancel tab screen of the Calibration window. To specify the channel, check
the check box to the left of the Name field.
3. To enable the 1 pA range offset current measurement of the
HR/ASU channel,
check the Full Range check box.
4. Set the integration time for the offset measurement to the Integration Time field.
Available value: 1
PLC (power line cycle) to 100 PLC, initial setting 16 PLC.
Set the value longer than the integration time for th
e measurement of the device
under test. Otherwise, the offset cancel will not be performed.
5. Click the Measure... button. A dialog box is opened.
Follow the instruction of the dialog box, and perform the of
fset measurement.
After the measurement, the offset cancel function is automatically enabled.
Open the measurement terminals at the cable end of the device si
de during the
offset current measurement.
NOTE The high resolution A/D converter is used for the offset current measurement.
To disable the offset cancel function, remove the check from the check box to the
left of the Name field.