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Electronic Measurement

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Why does my Keysight 4155A/B/C or Keysight 4156A/B/C show spikes in my GM curve when using DIFF or DELTA function?
You may see notches or spikes in MOSFET GM curves with small Vg step size (<50mV)...

FAQ 2003-06-13

How do I connect the Keysight 4155A/B/C or Keysight 4156A/B/C to coaxial probes?
Click the above link for details.

FAQ 2003-06-13

The Keysight 4156A/B/C noise level is over 100fA, what am I doing wrong?
Most likely, the current measurement range is limited to 1nA or higher. Make sure the range is set to AUTO...

FAQ 2003-06-13

How do I read the fault log of the Keysight 4155A/B/C or Keysight 4156A/B/C?
Press the "System" key on the front of the instrument. Press the "Calib/Diag" softkey at the bottom of the display. Press the "Green" key on the front of the instrument. Press the rightmost softkey at the bottom of the display.

FAQ 2003-06-13

Can I hookup Keysight 4155A/B/C and Keysight 4156A/B/C SMUs in series or parallel to double the output?
Yes, you can double the voltage to 200V or current to 200mA. See Module 2 of the Self-Paced Training Manual

FAQ 2003-06-13

Why does the Keysight 4156A/B/C default to Keysight 4155A/B/C accuracy at boot up?
The Keysight 4156A/B/C can trade off speed vs. accuracy. The Keysight 4156A/B/C boots up optimized for speed. It does this by limiting the lowest measurement range to 1nA (lowest Keysight 4155A/B/C current range)...

FAQ 2003-06-13

How do I find my Keysight 4155A/B/C or Keysight 4156A/B/C firmware revision?
Click the above link for details.

FAQ 2003-06-13

What 4284A configuration do I need to make semiconductor CV measurements?
For semiconductor CV measurements, you must order option 001 (Power Amplifier/DC BIAS) and option 006 (2m/4m Cable Length Operation)...

FAQ 2003-06-13

When should I use Kelvin Triaxial cables?
The Keysight 4156A/B Kelvin Triax cables are ideal for use with a low-level analytical prober using manual probe positioners. Specify a Kelvin Triax interface when purchasing your prober...

FAQ 2003-06-13

What is the minimum number of Source Monitor Units (SMUs) recommended for parametric test?
Since a MOSFET is a 4 terminal device (Source, Gate, Drain, and Bulk), the minimum number of SMUs recommended for parametric test is four...

FAQ 2003-06-13

What hardware do I need to integrate low-level IV and CV measurements?
For making IV measurements, Keysight recommends either the Keysight 4155C or the 4156C Parameter Analyzer...

FAQ 2003-06-13

Can I force currents or voltages beyond 1A or 200V using the Keysight 4155A/B/C and Keysight 4156A/B/C?
You can force currents or voltages beyond 1A or 200V by adding an external power supply. You only need a simple front panel setup file...

FAQ 2003-06-13

Why do the Keysight 4155 and 4156 source measurement units (SMUs) use triaxial cables?
The Keysight 4155A/B/C and Keysight 4156A/B/C are designed for low-current measurement...

FAQ 2003-06-13

How do I connect a networked printer to the Keysight 4155B or Keysight 4156B?
You need a server on which a Line Printer Daemon (LPD) is running (anywhere within the gateway)...

FAQ 2003-06-13

What are the different Keysight 4155C and Keysight 4156C programming options?
The Keysight 4155C and Keysight 4156C include several different programming languages: ASP, System and User Mode, SCPI, and Keysight FLEX...

FAQ 2003-06-13

How do I get data into a spreadsheet from Keysight 4155A/B/C or Keysight 4156A/B/C ?
The Keysight 4155A/B/C and Keysight 4156A/B/C have a spreadsheet button. Toggle the Graph/List front panel button so that you see a list of your data. Then press the spreadsheet button at the bottom of the screen...

FAQ 2003-06-13

What is SPECS?
SPECS (Semiconductor Process Evaluation Core Software) is a semiconductor parametric test shell that runs on the Keysight 4072A, 4072B, 4073A and 4073B Parametric Test Systems...

FAQ 2003-06-13

How is the Keysight 4142B different from the Keysight 4155C and 4156C?
The key difference between the Keysight 4142B and the Keysight 4155C/4156C is that the Keysight 4142B lacks front panel control.

FAQ 2003-06-13

Which versions of the 4062 are supported systems?
Click the above link to view the status of the 4062 family.

FAQ 2003-06-13

What is an SMU?
A Source Monitor Unit (SMU) is the fundamental resource for parametric measurement. The SMU typically has two (mutually exclusive) modes of operation: force voltage and measure current, or force current and measure voltage...

FAQ 2003-06-13

Do I need a wafer prober with a fully guarded chuck for use with my Keysight 4155A/B/C or Keysight 4156A/B/C?
It depends upon the type of measurements you plan to make on your wafer prober...

FAQ 2003-06-13

How can I get a Keysight 4155A/B/C or Keysight 4156A/B/C screen display into text editor or presentation software?
To get a screen display into text editor compatible format, we strongly recommend the purchase of graphics manipulation software such as IMSI's HiJaaK® Pro (US: 1-800-833-8082)...

FAQ 2003-06-13

Are Keysight 4145B setup files compatible with the Keysight 4155A/B/C or Keysight 4156A/B/C?
Yes, but check your 4145B disk format. If it is a 1.44MB disk (two sensing holes), the 4155A/B/C or 4156A/B/C thinks it is the older 750KB format. When reading the setup files, a format error occurs. Place cellophane tape over the media density ho...

FAQ 2003-06-13

Can I use the Keysight 4155A/B/C and Keysight 4156A/B/C to make time domain measurements?
Yes. The time domain features are called time SAMPLING measurements in the Keysight 4155A/B/C and Keysight 4156A/B/C...

FAQ 2003-06-13

My Keysight 4155A/B/C or Keysight 4156A/B/C pulsed measurements are not the width I specified, why?
When you set an SMU to Vpulse or Ipulse mode, it assumes you are using FIXED ranging and SHORT integration time. With short pulse widths there is not enough time to AUTO range or make LONG integration measurements...

FAQ 2003-06-13

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