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Fluke Calibration Blog
Calibration Equipment & Standards and Calibration Software
Jan 10, 2024
Calibrating X-Y Phasing
X input
Depending on the type of oscilloscope, the X input will be applied either via the External Trigger connector, or via Channel 1, with suitable switching. In either case, the same signal of 50 mV, 50 kHz will be applied to both X and Y inputs.
a. Initial setup
The oscilloscope controls are calibration set as follows:
Vertical mode: X-Y
Sensitivity: 5 mV/div, both channels
Ch 1 or X: AC coupled
Ch 2 or Y: Grounded
Vertical mode: X-Y
Vertical position: Central...
Jan 10, 2024
For most oscilloscopes, a wide variety of trigger modes exist, being sourced either via a nominated Y-input channel, or from a separate external trigger input.
The functionality of the trigger modes allows for AC or DC coupling, repetitive or single sweep, and trigger-level control operations.
These standard function tests check the operation of:
Internal trigger sensitivity in both polarities, from each of the available Y-input channels
Operation of the trigger level control for a sinewave...
Jan 10, 2024
The X-axis is dedicated almost exclusively to use as the vehicle for the time base(s). As well as multiple vertical channels, there will often be two time bases: Main and Delayed. These may be achieved in DSOs by two independent sampling rates, or via a positioned ‘zoom’ window on a single, but long, acquisition store.
Horizontal deflection accuracy
When determining the accuracy of horizontal deflection, typically with analog oscilloscopes, the geometry of the display must have first been set...
Jan 10, 2024
The Y-axis is used, almost exclusively, for displaying the amplitude of incoming signals. These are processed through ‘channel’ amplifiers (at minimum two channels, but often four or more). Basic setup features for amplitude calibration include:
Zero alignment to graticule (Offset)
Vertical amplifier balance
Vertical channel switching
Operation of alternate/ chopped presentations
Horizontal deflection accuracy: amplitude
Multiple-traces are created using alternate-sweep switching or ‘chopped...
Jan 09, 2024
Oscilloscopes are extraordinarily complex instruments. At their most basic level, they provide easy and direct access to waveforms then make both qualitative and quantitative analysis of that information. But each oscilloscope also offers users the flexibility to deal with a wide range of functions, frequencies, and voltages in one tool. That makes calibrating them more complicated, yet even more important.
Calibrating an oscilloscope is essential to ensure accuracy and reliability of its...
Jan 09, 2024
As technology continues to advance, oscilloscopes with bandwidths of several GHz are often the norm, now. However, traditional methods of bandwidth testing can be complex and introduce errors, particularly if bandwidth is calculated from a risetime measurement. This is where the Fluke Calibration 9500C Oscilloscope Calibrator comes in.
This device offers true bandwidth testing of scopes up to 4 GHz and can also perform accurate pulse response testing with fast return-to-ground edges with...
Jan 02, 2024
Vertical channel pulse testing response plays a pivotal role in oscilloscope calibration. This process involves high-frequency signals and fast rise time pulses that carry considerable high-frequency content. The typical testing method is to employ a fast edge, and then monitor the transition time displayed from 10% to 90% of the step size.
Aberrations in pulse (pre-shoot and overshoot) are frequently measured too. Reflections that can skew pulse shape and affect results can be caused by...
Sep 19, 2023
The 5500A Series Multi-Product Calibrator is a true workhorse in a calibration lab. Able to handle a wide range of measurement industries used in various industries. However, calibration labs must be ready to adjust to meet the needs of their customers. Industries, like the semiconductor industry, are evolving quickly, and labs need to improve their calibration offerings in order to stay ahead of competition.
Taking the capabilities of a 5560A, 5550A, or 5540A Multi-Product Calibrator and...
Jun 21, 2023
Accurate temperature measurement is essential to ensure that products are of consistent quality, and that equipment is working correctly. Which, as we know, means temperature calibration is essential in many industries around the world. Using the new thermocouple connector on the Fluke Calibration 55X0A Multi-Product Calibrator can help you work through your calibration workload that much more efficiently.
Why use a multi-product calibrator and thermocouple connector for temperature...
May 02, 2023
When it comes to mobile calibration services, Murphy’s Law tends to be in full effect: what can go wrong will go wrong.
“During my time as a mobile calibration technician, I cannot recall a specific instance where the asset list communicated by the customer was entirely accurate. The list mirrored the plan a little bit, but there's always a couple of extras that were hiding in somebody's toolbox, unexpected repairs, or some equipment was lost. So, you really must be prepared for anything.” –...