1 Hz - 255 kHz, +54 dB Gain, 5 Built in Filter responses, Top Performance, High Versatility
The VBF 44 is our top of the range 4 channel laboratory filter, with versatile input stage, gain, and 5 built in filter responses.
- Filter cutoff range 1 Hz - 255 kHz
- Gain to +54 dB
- 5 Built in Filter Responses
2 Lowpass, 2 Highpass, and Bandpass
- 135 dB/Octave filters
- Manual and computer control
- Easy to use
- Wide dynamic range
- Series and Parallel modes
The Kemo VBF44 is a benchtop filter offering unparalleled versatility. It contains 4 precision electronic filter channels. Each filter channel can be used independently to produce a 4 channel programmable filter/amplifier, or in pairs to produce 2 channels of bandpass, bandstop and other composite filters of many kinds. The VBF 44 is now built in a compact chassis, stainless steel laser cut panels, push button LCD and menu control, and passive ( silent) cooling.
The VBF 44 is part of the Kemo VBF 40 series of filters, also available is the full rack VBF 40 for 2-16 channels. Easy to use front panel controls, BNC input/output connectors, and a very versatile set of filter responses make the VBF 44 a top range laboratory filter.
|Control||Manual LCD and push button
Ethernet FICL II interface
|Frequency||DC - 255 kHz (4 ranges)|
|Bandwidth||> 1 MHz, 1V signal, 0dB gain, highpass filter and filter bypass|
|Input Gain||x1, x2 (+6dB), x5 (+14dB), x10 (+20dB), x20 (+26dB), x50 (+34dB), x100(+40dB)|
|Output Gain||x1, x2 (+6dB), x5 (+14dB), x10 (+20dB)|
|Filters||5 Switchable; 2 Lowpass, 2 Highpass, Bandpass, and Filter Bypass|
|Filter Responses||L1, L2, H1, H2, B1|
|Input Coupling||AC / DC / IEPE (4mA 24V) with 3 stage indicator|
|Input Mode||Single ended or differential|
|Signal level||+/- 10V pk-pk (usually with 'headroom')|
|Signal Level Indication||4 colour level LED on panel|
|Size||145 x 482 x 420 (3U 19" x 16")|
|Power||90 -120 / 180-240 Vac 50/60Hz|
Each filter in the VBF44 tunes over a frequency range of 1 Hz to 255 kHz in four decade ranges.
1Hz - 255Hz, 10Hz - 2 550Hz, 100Hz - 25.5kHz, and 1kHz - 255kHz.
The inputs (differential, switchable to single ended) have gain to ( x50+34 dB) and the output stages, after the filter, provide up to x10 (+20dB). This configuration allows advanced signal optimisation, a signal can be amplified, then have the unwanted parts reduced and then further amplified.
A Flexible Response
Each filter in the VBF44 offers five responses - high slope elliptic lowpass and highpass, flat passband linear phase lowpass and fast settling highpass, and bandpass with characteristics similar to 1/3 octave. The filter can also be bypassed and the unit used as a programmable amplifier.
Keeping in Tune
The VBF 44 is easy to use and connect to, all 4 channel connectors are available on the laser cut and marked rear panel.