Pico Macom PSW044-2.0 manual Oversampling, Procedure, How to choose the oversampling factor

Page 15

PicoScope and oscilloscope primer

12

5.8Oversampling

Oversampling is a technique of capturing samples n times faster than the requested sampling rate, then replacing each group of n adjacent samples with the average of that group. If the signal contains a small amount of noise, the result of oversampling is a waveform with increased effective resolution. The amount of oversampling available depends on how fast your scope device 68 can sample.

Procedure

First make sure that the Oversampling control is displayed on the Scope Setup toolbar 53. If it is not, add this control to the toolbar as explained in the "Toolbars 44" topic.

Use the Oversampling control to adjust the oversampling factor (n). PicoScope allows oversampling factors in the range 1 (no oversampling) to 256.

How to choose the oversampling factor

To obtain an increase in effective resolution of n bits, you should choose an oversampling factor of 4n. Conversely, an oversampling factor of f will give an increase in effective resolution of log(f) / n log(4).

For example, if a scope device has a stated resolution of 8 bits, then an oversampling factor of 4 will, under ideal conditions, increase this to 9 bits. An oversampling factor of 16 will increase the effective resolution to 10 bits, and a factor of 256 will increase it to 12 bits.

These calculations assume that the noise is Gaussian (follows a normal distribution). This is approximately true for noise from natural sources, such as thermal noise in resistors and sensors, but not be true for man-made noise such as radio interference and mains (line) hum. The scope device itself often produces enough low-amplitude noise to make oversampling successful.

The benefit of oversampling comes at the cost of having to increase the sampling rate. If your scope device is already running at its maximum sampling rate in order to capture high-frequency details in the signal, then it will not be able to oversample.

Copyright 2006 Pico Technology Limited. All rights reserved.

PSW044-2.0

Page 14 Page 16
Image 15
Page 14 Page 16
Contents PicoScope PC Oscilloscope Software Table of Contents How to ReferenceIndex Welcome How to use this manual Whats new in this version?Higher performance Version 6.0 updateVersion 6.0 update New featuresIntroduction How to use PicoScopeLegal statement How to use this manual Contact informationSystem requirements Using PicoScope for the first time Using PicoScope for the first timeIt didnt do what I expected Oscilloscope basics PicoScope and oscilloscope primerPCO basics PicoScope basicsPicoScope and oscilloscope primer Capture window To open a new capture windowTo arrange the scope views within the capture window Frequency legend Custom probesMeasurements table To edit a measurementTo change the width of a measurement column Procedure How to choose the oversampling factorOversampling Ruler legend Post-trigger arrowCursor position tool tip Scope viewRuler tool tip Time rulersTrigger marker Ruler tooltip Signal rulersUpgrading from PicoScope Windows, views and viewportsMenus Menus File menuSettings files *.pssettings Save As dialogData files *.psdata PNG Image *.png Menus Text Tab delimited *.txtBitmap Image *.bmp GIF Image *.gifEdit menu Help menu Measurements menu Add / Edit Measurement dialog Custom Probes dialog Tools menuAdding a new probe to your library Custom Probe wizardCreate New Custom Probe dialog How to use the dialogEdit Existing Custom Probe dialog Probe Output Units dialog Scaling Method dialog Editing the Look-up Table Import/ExportFinishing Range Management dialog What is Auto-ranging?How to use a new custom range Manual Ranges Setup dialogWhat is a scaled range? Automatic modeFixed range mode What is an input range?PicoScope 6 User Guide Range utilisation bar Custom Probe Identification dialog Custom Probe Finished dialog Where to find it Preferences dialogGeneral dialog Performance dialog Toolbar menu How to use itWindow menu Toolbars ToolbarsCustomizing Buffer Navigation toolbar Capture Windows toolbarWaveform buffer Open Device dialog Demo modeProbe Drop-Down menu Channel Setup toolbarCustomization dialog Customization Toolbars Customization Commands Options tab of the Customization dialog Toolbars Customization OptionsAdd Measurement Help toolbarMeasurements toolbar Measurements toolbar controls the measurements tableScope Setup toolbar Standard controlsAdditional controls Signal Generator toolbar Signal Generator dialogLeft Signal generator dialog for the PicoScope 3206 PicoScope 6 User Guide How to use it Start / Stop toolbar Trigger Mode Triggering toolbarTechnical Note Zooming and Scrolling toolbar Demo Signals dialog Demo Signals toolbarHow to How toUsing two rulers for differential measurements How to change to a different scope deviceHow to use rulers to measure a signal Using a single ruler for signal-to-ground measurementsHow to move a view How to measure a time differenceMeasurement types ReferencePeak To Peak The difference between maximum and minimum ReferenceTrigger timing part Tip Keyboard shortcuts Glossary Index Index PicoScope 6 User Guide PSW044-2.0

PSW044-2.0 specifications

The Pico Macom PSW044-2.0 is a versatile and efficient satellite signal splitter designed for seamless distribution of satellite signals in residential and commercial settings. This innovative device stands out for its exceptional performance, solid build quality, and user-friendly features, making it a reliable choice for installers and system integrators.

One of the main features of the PSW044-2.0 is its four-way signal distribution capability, allowing users to connect multiple devices such as satellite receivers, DVRs, or televisions to a single satellite dish. This is particularly beneficial in multi-room setups where each room may require access to satellite signal without the need for multiple dishes. The splitter effectively reduces the clutter of additional cables while maintaining signal integrity.

The PSW044-2.0 is built on advanced technologies that ensure minimal signal loss and high-frequency stability. Featuring a wide frequency range from 5 MHz to 2300 MHz, this splitter is compatible with a broad range of satellite frequencies, including both standard and high-definition signals. This makes it an ideal choice for modern homes equipped with advanced satellite systems.

Another characteristic that sets the Pico Macom PSW044-2.0 apart is its robust construction. The device is engineered with high-quality materials to enhance durability and longevity. Its compact design makes it easy to install in tight spaces, while the LED indicators facilitate monitoring of signal transmission.

For enhanced performance, the PSW044-2.0 incorporates advanced isolation techniques that prevent signal interference between outputs. This ensures that connected devices can operate without cross-talk, which is crucial for clear and uninterrupted viewing experiences. Additionally, the splitter is designed to handle varying line voltages and has built-in surge protection to safeguard connected equipment from electrical surges.

Overall, the Pico Macom PSW044-2.0 is a sophisticated solution for anyone needing to distribute satellite signals efficiently and effectively. With its combination of high performance, durability, and user-friendly features, it significantly enhances the satellite signal distribution experience, making it a valuable component in any satellite communication setup.
Top Page Image Contents