- 2550:1 cutoff span
- Frequency 0.1 Hz to 51 kHz
- -18 dB to +66 dB Gain (x0.125 to x2048)
- Differential input
- Switched 4mA IEPE source
- Range of factory set filter responses
- 16 channel 19" rack frame
- Up to 8 frames per interface
- Computer Controlled
 21CF30 pdf data sheet (60
kB)
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|
Frequency Range
The 21CF30 covers a 2550:1 range, implemented as two ranges of 255:1and
10:2550.
Four frequencies are available as standard: 0.1Hz, 1Hz, 10Hz and 20Hz. These give maximum frequencies of 255Hz, 2.55kHz, 25.5kHz and 51kHz respectively.
| 1 Hz Model |
1 - 255 Hz in steps of 1 Hz |
10 - 2 550 Hz in steps of 10 Hz |
| 0.1 Hz Model |
0.1 - 25.5 Hz in steps of 0.1Hz |
1 - 255 Hz in steps of 1 Hz |
| 10 Hz Model |
10 - 2 550 Hz in steps of 10 Hz |
100 - 25 500 Hz in steps of 100 Hz |
| 20 Hz Model |
20 - 5 100 Hz in steps of 20 Hz |
200 - 51 000 Hz in steps of 200 Hz |
Gain Range
A unity gain pre-trimmed differential stage feeds an amplifier with gain programmable from 0dB to
42dB in 6dB steps. After passing through the filter the signal is applied to an amplifier with gain from -18dB to 18dB in 6dB steps. In this way the output signal level can be adjusted to suit most conversion and recording systems.
Filter Response Types
Each 21CF30 card has a fixed response characteristic set at the factory. The card is available in several standard filter responses. The most
usual is filter response 01
lowpass, for alias prevention.
Summary Specification
| Channels |
1-16 per rack ( up to 4 racks per
system) |
| Control |
RS 232 or GPIB |
| Frequency |
0.1 Hz - 51 kHz |
| Gain |
-18dB to +66 dB |
| Filters |
Low pass or High pass. |
| Filter Responses |
01
03 05
07 09
41 |
| Input Coupling |
AC / DC |
| IEPE |
Yes 4mA 20V |
| Size |
3U 19" |
| Power |
90 -120 / 180-240 Vac 50/60Hz
Optional 9 - 30 V DC, with AC 'power brick' |
Other Features
The 21CF30 is provided with programmable AC input coupling (-3dB @ 0.1Hz). In addition, a programmable 4mA current source for
IEPE transducers is fitted, enabling the 21CF30 to offer a complete front end for this style of sensor.
Input and outputs are via front panel BNC connectors.
Optional DC power is
available.
21CF30 pdf data sheet (60 kB)