Description Frequency Devices model VM32FF comprises a family of VMEbus filter boards offering 32 channels of fixed frequency, linear analog filtering in a single width B-sized (6U) form factor. VM32FF boards receive up to 32 high level differential signal inputs through a shielded front panel connector and provide signal buffering and unity gain for each channel (optional - customer specified gain). Boards may be configured with 2-pole D72 or 4-pole D74 filters from 1.0 Hz to 100.0 kHz, and with high-pass or low-pass (anti-alias) transfer functions allowing user to externally cascade filters into band-pass configurations. Each channel provides low harmonic distortion and wide signal-to-noise ratio to 12 bit resolution. Features/Benefits: Simultaneous access over 32 channels offers a low cost, versatile and convenient way to provide amplification and filtering. Interchannel crosstalk <-80 dB provides precision performance solutions to design engineers, system integrators and OEM's. 2- and 4-pole Butterworth or Bessel transfer functions with a broad range of corner frequencies are offered to meet a wide range of applications. High channel count density without sacrificing performance maximizes chassis utilization.   Applications Industrial process control Engine test and simulation Acoustic, vibration analysis & control Satellite and telecommunications Automatic test equipment (ATE) Aerospace, navigation & sonar Automotive test cells     LOW-PASS FILTER OPTIONS   D72L2B 2-pole Butterworth   D72L2L 2-pole Bessel   DP72L2B 2-pole Butterworth (1 Hz to 5 kHz)   DP72L2L 2-pole Bessel (1 Hz to 5 kHz)   D74L4B 4-pole Butterworth     D74L4L 4-pole Bessel     DP74L4B 4-pole Butterworth (1 Hz to 5 kHz)     DP74L4L 4-pole Bessel (1 Hz to 5 kHz)     HIGH-PASS FILTER OPTIONS     D72H2B 2-pole Butterworth     D74H4B 4-pole Butterworth           Specifications (@ 25°C and rated power input) Analog Input Impedance: 1 GΩ / 15pF Input Range: ±10V pk. Iinear Maximum Input: ± 60V Common Mode Rejection: 75 dB min. @ 60Hz Analog Output Impedance: 0.1 Ω typ., 1.0Ω max. Linear Operating Range: ±10V pk. Channel to Channel Crosstalk: <-80 dB @ 10 kHz Maximum Current: ±2mA Offset Voltage: ±10mV max. Offset Temp. Coeff. 20 µV/°C Short Circuit Protection: Short to Ground Peak Distortion @ 1 kHz, 3.54 Vrms: 80 dBc max. In-band Spectral Noise, Gain of x500: 230nV / sqrt(Hz) Filter Characteristics See D72 or D74 Series specifications Cut-off Frequency fc (-3dB): Fixed frequency from 1 Hz to 100 kHz   Gain Nominal Gain 1X Accuracy: ± 1.0% (optional) 10X, 100X, 1000X, Contact factory for other gain options Power Supply From VME Backplane: +12V and -12V, ±5%, 0.9A max. each, no load Isolation: Analog ground may be isolated from VME and chassis ground by jumper Environmental Operating Temperature: 0°C to +70°C Storage Temperature: -25°C to +85°C Humidity 0-95% non-condensing Mechanical Card Size: VMEbus 6U single slot 9.17 x 6.3 inches, (233 x 160 mm) No. of Input Channels: 32 Differential - DC coupled Two groups of 16 No. of Output Channels 32 Single Ended - DC coupled Mating Connectors Input: Female high density 62-pin D-sub, Quantity 2 Output: Male high density 44-pin D-sub, Quantity 1 Weight 1.5 LB2., (681 grams) Ordering Information We hope the information given here will be helpful. The information is based on data and our best knowledge, and we consider the information to be true and accurate. Please read all statements, recommendations or suggestions herein in conjunction with our conditions of sale which apply to all goods supplied by us. We assume no responsibility for the use of these statements, recommendations or suggestions, nor do we intend them as a recommendation for any use which would infringe any patent or copyright.