The SIM965 Analog Filter is ideal for signal conditioning applications where Bessel or Butterworth filters are needed.
Bessel filters offer clean step response (negligible overshoot) and linear phase response, while Butterworth filters provide excellent pass-band flatness with some overshoot.
A choice of high-pass or low-pass filtering is selected from the front panel. Cutoff frequencies are set with 3-digit resolution, and a choice of 12, 24, 36 or 48 dB/octave rolloff is provided for either filter type.
The SIM965 accepts input signals between ±5 V, and has unity gain. Its low noise and low harmonic distortion, along with a bandwidth of greater than 1 MHz, make it ideal in sensitive analog applications.
Up to eight SIM965 modules can be housed in one SIM900 mainframe. Mainframes can be cascaded, allowing an unlimited number of filter channels for complex applications.
The SIM965 is also fully programmable. All functions can be controlled from a computer via the SIM900 Mainframe. Both RS-232 and GPIB interfaces are supported by the mainframe.
Impedance 1 MΩ
Coupling AC or DC
Max. input ±5 V
Filter Low-pass or high-pass
Tuneable freq. range 1 Hz to 500 kHz
Rolloff 12 dB/oct., 24 dB/oct.,
36 dB/oct., or 48 dB/oct.
Noise <200 µVrms (1 MHz bandwidth)
THD 0.01 % (80 dB) at 1 kHz
Operating temp. 0 °C to 40 °C, non-condensing
Interface Serial via SIM interface
Connectors BNC (2 front, 1 rear) DB15
(male) SIM interface
Power Power supplied by the SIM900
Mainframe, or optionally by a
user-supplied DC power supply
(±15 V and +5 V)
Dimensions 1.5" × 3.6" × 7.0" (WHL)
Weight 1.5 lbs.
Warranty One year parts and labor on
defects in materials and