|Bandwidth||DC to 10 kHz (-3dB) in DC mode 0.16 Hz to 10 kHz in AC mode|
|Filter response||Bessel or Butterworth|
|Filter slope (low- and high-pass)||2nd or 3rd order (12 or 18 dB/octave)|
|Low pass filter corner frequency||1 Hz - 10 kHz cont. variable|
|High pass filter corner frequency||0.01 Hz - 1 kHz cont. variable|
|Filter latency||0.35 ms (approx.)|
|Mains notch cut (50 Hz or 60 Hz)||50 dB (typical)|
|Overload indicator||2 yellow LEDs (1 for each polarity) indicate when input is overrange|
|Important note: The CED 1902 is sold as a research instrument and not as a medical device within the meaning of the EC Medical Device Directive.|
|Front end type||Low noise EEG||ECG|
|Input bias current at 25°C|
|Noise referred to input, 1 Hz - 10 kHz|
|Common-mode rejection at 50 Hz|
|Common-mode voltage range|
|Input offset voltage, initial adjusted|
|Gain ranges (including 1902 system board)|
|Gain step sequence|
|Bandwidth, all gains|
|Isolation voltage, continuous|
|Isolation voltage, peak for 5 sec|
|Input-output leakage at 240V, 50 Hz|
|Input clamp option|
|Input impedance||1 GOhm|
|Input bias current at 25 °C||50 nA|
|Common mode rejection (at x100 gain)||80 dB at 50 Hz|
|Bandwidth||DC - 10 kHz|
|Gains||x1 to x100,000|
|Gain step sequence||1, 3, 10|
|Noise 1 Hz to 10 KHz (at x100 gain)||1 microV r.m.s.|
|Input impedance||100 kOhms|
|Trigger level||+1.25 (approx.)|
|Trigger hysteresis||+0.5V (approx.)|
|Output pulse||TTL negative-going|
|Output pulse length||3 microSec|
|Trigger output drive capability||0.9 mA maximum|
|1902 chassis mechanical dimensions||Width 240 x height 46 x depth 240 mm|
|1902 weight (approx.)||2.5 Kg|
|Power input||100 - 240V AC external power supply (PSU can supply up to four 1902s)|
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. ×