# VM32FF: 32 Channel Fixed Frequency VME Filter Board

## Description

· 32-channel VMEbus filter board
· B-sized (6U) form factor
· Receives up to 32 high-level differential signal inputs
· Provides signal buffering and unity gain (optional customer gain)
· Filter options: 2-pole D72/DP72, 4-pole D74/DP74, high-pass or low-pass
· Fixed frequency from 1.0 Hz to 100.0 kHz

## Features & Benefits

· Simultaneous access over 32 channels for amplification and filtering
· Interchannel crosstalk <-80 dB
· 2- and 4-pole Butterworth or Bessel transfer functions
· High channel count density

## Applications

· Industrial process control
· Engine test and simulation
· Acoustic/vibration analysis
· Satellite/telecommunications
· Automatic test equipment (ATE)
· Aerospace/navigation/sonar
· Automotive test cells

## Specifications

Analog Input
· Impedance: 1 GΩ//15pF
· Maximum Input: ±10V pk linear
· Over Voltage Protection: ±60 V
· Common Mode Rejection: 75 dB min. @ 60 Hz

Analog Output
· Impedance: 0.1W typ., 1.0W max
· Linear Operating Range: ±10V pk
· Channel to Channel Crosstalk: <-80 dB @ 10 kHz
· Maximum Current: ±2.0mA
· Offset Voltage: ±10mV max.
· Offset Temp. Coeff.: 20 mV/°C
· Short Circuit Protection: Short to Ground
· Peak Distortion @ 1 kHz, 3.54 Vrms: 80dBc max.
· In-band Spectral Noise, Gain of X500: 230nV/ √ Hz

Filter Characteristics
· Cut-off Frequency (fc): 1 Hz to 100 kHz

Gain
· Nominal Gain: 1X, Accuracy ± 1.0%
· Optional Gains: 10X, 100X, 1000X (contact factory for others)

Power Supply
· +12V and -12V from VME backplane, ±5%, 0.9A max each, no load
· Analog ground isolation via jumper

Environmental
· Operating: 0°C to +70°C
· Storage: -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)
· Input Channels: 32 Differential, DC coupled (two groups of 16)
· Output Channels: 32 Single Ended, DC coupled
· Mating Connectors: Input - Female 62-pin D-sub, Output - Male 44-pin D-sub
· Weight: 1.5 LB, (681 grams)

Ordering Information
· Available in 8, 16, or 32 channels.
· Filter Type: D72, DP72, D74, DP74
· Optional Gain: 10, 100, 1000