The CED 4401 is designed for use in locking the sampling clock of a CED 1401 data acquisition unit to an external reference frequency, such as those encountered in other sampling systems. Suitable inputs are TTL signals that are stable sub-multiples of 20MHz. The CED 4401 takes this frequency and multiplies it up to the 20MHz needed to feed the external synchronising input of a CED 1401. The power LED on the CED 4401 turns from red to green when a usable input frequency is detected.
Case size: 126mm x 104mm x 53mm (W x D x H) excluding connectors and power supply.
Power supply: 100 – 240V a.c. mains input 50 – 60 Hz, 9V d.c. output.
Registered in England: 972132
VAT: GB 214 2617 96
Producer Registration number: WEE/BD0050TZ
For our US customers, we can provide tax form W-8BEN, that identifies us as a UK company.
(Int.+44) (0)1223 420186
1 800 345 7794
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. ×