Signal incorporates a powerful sequencer function for generating digital and analogue outputs for stimulus control. Sequences are run within the 1401 interface to ensure highly accurate timing independent of the host PC operating system. There are two methods available for specifying outputs.
The graphical pulse editor covers the majority of stimulus requirements in an easy to use drag and drop environment where you build up to 256 sets of up to 500 pulses linked to the multiple states system. Outputs are fixed or they can change amplitude and duration on repeats. You can also modify the outputs while sampling continues.
If your requirements cannot be entirely met with the pulse editor you can define your outputs as a text sequence of instructions. This makes it possible to control the sequence interactively or by using the script language running on the host PC to pass variables and tables of values to the 1401. It also enables you to produce pulse protocols either time-locked to the recording frames or free running. Further experiment control options including communication through serial lines are also available using the script language.
Output pulse editor
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CED, through this site, does two things that relate to privacy. We would like to explain them.
We offer free down-loads of many files on our site, from test programs to complete install files for updated versions of major packages like Spike2 and Signal.
When customers wish to take a down-load of a major package, we ask a few questions, including their name, email address, the serial number of the software for which they seek an upgrade and whether they would like an automatic email whenever we update the product. This information is emailed back to CED when they access the final down-load screen. Within this email, your browser transmits the type and version of browser you are using, and the screen resolution you are running.
The reasons why we take and keep this information are that it is useful for our software development team to know who has taken the latest versions, and it is useful for our web site development team to know which browsers people are using to view our site, and what resolution they have their screens set to.
When people down-load a major package, we try to write a cookie, a small file in your computer, that records your name, serial number of the software package, and the version you are down-loading. These files have a lifetime of one year.
The reasons for storing this information are firstly that if you ask for another down-load some other time, your details are read from the cookie and are pre-written into the form, to save you looking them up again. The other reason is that next time you access our site, your browser looks through your CED cookies and compares the versions down-loaded with the latest version numbers read from our site. If there is a later version of a product you have already down-loaded, we tell you on the home page screen, so you know that it is worth going to the down-load page again.
None of this information is ever given to anyone outside CED. ×