- Compact - 16 channels per GPSC rack
- Acceleration/displacement outputs
- Controls in engineering units
- Internal calibration
The Model 149 is an economical two-channel-per module charge amplifier that plugs into Encore's 19" GPSC instrumentation rack, which accommodates up to eight modules (16 channels). An AC power supply is built into the rack, and provides the required unregulated DC voltages to operate the modules. A continuously adjustable ten-turn locking dial selects acceler-ometer sensitivity from 1 to 110pC/g. Outputs are AC acceleration, and RMS/DC displacement. A front panel pushbutton or remote CAL command applies a 1000pC 350Hz calibration signal to both channels simultaneously.