Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/import.php on line 29

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/import.php on line 32

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JRequest::clean() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/import.php on line 33

Strict Standards: Non-static method JRequest::_cleanArray() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/environment/request.php on line 463

Strict Standards: Non-static method JRequest::_cleanArray() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/environment/request.php on line 464

Strict Standards: Non-static method JRequest::_cleanArray() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/environment/request.php on line 465

Strict Standards: Non-static method JRequest::_cleanArray() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/environment/request.php on line 466

Strict Standards: Non-static method JRequest::_cleanArray() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/environment/request.php on line 467

Strict Standards: Non-static method JRequest::_cleanArray() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/environment/request.php on line 468

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/import.php on line 35

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/import.php on line 38

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/import.php on line 39

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/import.php on line 46

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/import.php on line 47

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/import.php on line 50

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/import.php on line 53

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/import.php on line 54

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/import.php on line 57

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/import.php on line 58

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JFactory::getApplication() should not be called statically in /home/seventen/public_html/cms/index.php on line 31

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Redefining already defined constructor for class JObject in /home/seventen/public_html/cms/libraries/joomla/base/object.php on line 57

Strict Standards: Non-static method JApplication::getInstance() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/factory.php on line 46

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JApplicationHelper::getClientInfo() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/application/application.php on line 132

Strict Standards: Declaration of JSite::getRouter() should be compatible with & JApplication::getRouter($name = NULL, $options = Array) in /home/seventen/public_html/cms/includes/application.php on line 377

Strict Standards: Declaration of JSite::getPathWay() should be compatible with & JApplication::getPathway($name = NULL, $options = Array) in /home/seventen/public_html/cms/includes/application.php on line 377

Strict Standards: Declaration of JSite::getMenu() should be compatible with & JApplication::getMenu($name = NULL, $options = Array) in /home/seventen/public_html/cms/includes/application.php on line 377

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/registry/registry.php on line 19

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Declaration of JSession::set() should be compatible with JObject::set($property, $value = NULL) in /home/seventen/public_html/cms/libraries/joomla/session/session.php on line 737

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/session/session.php on line 19

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /home/seventen/public_html/cms/libraries/joomla/import.php:29) in /home/seventen/public_html/cms/libraries/joomla/session/session.php on line 423

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/seventen/public_html/cms/libraries/joomla/import.php:29) in /home/seventen/public_html/cms/libraries/joomla/session/session.php on line 423

Warning: Cannot modify header information - headers already sent by (output started at /home/seventen/public_html/cms/libraries/joomla/import.php:29) in /home/seventen/public_html/cms/libraries/joomla/session/session.php on line 426

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/html/parameter.php on line 21

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JPluginHelper::importPlugin() should not be called statically in /home/seventen/public_html/cms/index.php on line 41

Strict Standards: Non-static method JPluginHelper::_load() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/plugin/helper.php on line 92

Strict Standards: Non-static method JPluginHelper::_import() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/plugin/helper.php on line 97

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Redefining already defined constructor for class JPlugin in /home/seventen/public_html/cms/libraries/joomla/plugin/plugin.php on line 75

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Declaration of JEvent::update() should be compatible with JObserver::update() in /home/seventen/public_html/cms/libraries/joomla/event/event.php on line 29

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 71

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JDispatcher::getInstance() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/plugin/helper.php on line 140

Strict Standards: Non-static method JPluginHelper::getPlugin() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/plugin/helper.php on line 147

Strict Standards: Non-static method JPluginHelper::_load() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/plugin/helper.php on line 41

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Non-static method JLoader::load() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 161

Strict Standards: Non-static method JLoader::register() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 138

Strict Standards: Declaration of JRegistryFormatINI::objectToString() should be compatible with JRegistryFormat::objectToString(&$object) in /home/seventen/public_html/cms/libraries/joomla/registry/format/ini.php on line 281

Strict Standards: Non-static method JPluginHelper::_import() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/plugin/helper.php on line 97

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JLoader::import() should not be called statically in /home/seventen/public_html/cms/libraries/loader.php on line 186

Strict Standards: Non-static method JDispatcher::getInstance() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/plugin/helper.php on line 140

Strict Standards: Non-static method JPluginHelper::getPlugin() should not be called statically in /home/seventen/public_html/cms/libraries/joomla/plugin/helper.php on line 147

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Oscilloscope Mk 1

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Oscilloscope Mk 1
Tuesday, 04 December 2007 22:37

The Mac based high-speed oscilloscope was started for my third year electronic engineering project as part of my degree course at the University of Exeter. This got me to a first working prototype operating at 50MSPS, and won me the Philip Booth Prize for the best individual project.

 

Specifications

The first version of the oscilloscope can do the following:

  • 50 MSPS sample rate
  • 25 MHz analogue bandwidth (single-shot)
  • ±5V input range
  • Switchable x10 analgoue gain
  • USB 2.0 Full speed (12Mbps)
  • Single channel units, cascadable to form multi-channel arrangements
  • 256 sample buffer
  • Intelligent high speed triggering

Design Principles

The idea behind the design of the USB oscilloscope was to try to use programmable logic devices to implment very high-speed triggering and buffer systems, so that a high bandwidth signal (400Mbps+ when sampled) can be showed to a user over a much lower bandwidth channel (12Mbps). Modern digital storage oscilloscopes (DSOs) use exactly the same principle. Showing a 250 sample wide graph to a user of data sampled at 50MSPS results in the graph being renewed almost 200,000 times every second, whereas the human eye can only perceive changes at around 10-20ms (50 times a second). The trigger system then stops the sampling once the user defined trigger event has been generated, and uploads the buffer full of samples, at the much slower rate, to the user software.

Design Flexibility

The oscilloscope design created can easily be adapted for an almost infinite range of custom test and diagnostic equipment. The design makes full use of custom programmable elements meaning that almost every aspect of the design can be altered by simply downloading the new design to the circuit. The small size of the PCB means that it can easily be integrated into existing systems, and the use of a cascadable trigger syncronisation system allows for as many oscilloscope channels as you have USB ports for (typically 127 including hubs!).

The object-oriented software design, written in the rapid application development environment REALbasic, allows for very straightforward customisation of the user application to meet whatever needs the user has. REALbasic and the USB driver APIs also allow for the software to be compiled to run on Windows and Linux along with Mac OS X.

Update - Designs released

Since writing this article I have decided to release the designs for this oscilloscope to the world under a Creative Commons license. Please see this article...