1 Hz - 255 kHz, +60 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
- Precise channel matching
- 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. Built in series and paralell conection between channels allows a fully variable bandpass, notch and band stop filters to be configured.
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.
1 Hz - 255 Hz,
10 Hz - 2 550 Hz,
100 Hz - 25 500 Hz, and
1 kHz - 255 kHz.
The inputs (differential, switchable to single ended) have gain to x100 (+40 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.