Racal Instruments 3171 Overview

Racal Instruments™ 3171 80 MS/s Isolated Waveform Generator and Dual 50 MHz Pulse Generator combines multi-instrument density and high-frequency performance in a single-slot, C-sized VXIbus format. Isolated waveform output in the range of 100 mHz to 40 MHz with 12-bit vertical resolution and pulse output to 50 MHz makes the 3171 a powerful solution to a variety of test stimulus requirements.

Multi-Instrument Functionality

The 3171 is a synergistic combination of an Arbitrary Waveform Generator and Dual Pulse Generator. The 3171 is really three independent instruments in one module that may be used simultaneously for three separate purposes, or together, to create complex pulse or trigger sequences. System density is maximized when compared to GPIB or single-function VXIbus module formats. The Option 01T interface controls the 1260-39, using both registerbased and message-based operation. Refer to the applicable Option 01T data sheet for specifications and product features such as include, exclude, and scan lists, relay coil-current monitoring, and user-defined path names and reset states.

Isolation From Ground

The Arbitrary Waveform Generator (Arb) output provides 250 volts of isolation from VXIbus ground. This feature helps eliminate system ground loops and protects the VXIbus from damage from external hazardous voltages that may be connected to the instrument’s interface connector.

Built-In Digital Word Generator

The 3171’s Arb output is available as both an analog signal (up to 22 Vpk-pk into 50 O) or as a 12-bit digital word with TTL levels which can source or sink 15 mA. This powerful feature may be used as 12 independent TTL pulse outputs or as a 12-bit digital pattern generator.

External Amplitude Modulation

The Arb output of the 3171 may be controlled in amplitude by an external DC signal up to ±10 Volts or modulated in amplitude by an external AC signal up to 400 kHz. This feature allows for real-time control of the Arb output for control system applications and AM signal generation for telecom applications.

Dual Pulse Generator

The two pulse generator outputs of the 3171 are available with programmable rise and fall times ranging from 3 ns to 150 ns. Pulse Generator #1 (PG1) has the additional ability of independently programmable rise and fall times from 150 ns to 1 second. Pulse width and delay parameters are programmable on both pulse generators from 120 ns to 1 second with 2 ns resolution.

Flexible Triggering

3171 output channels may be synchronized to each other or to other 3171 modules within the same VXIbus mainframe using triggers. Waveform may be output continuously, one or more cycles per trigger or under the control of a gate signal. A sync and cursor output signal exist to synchronize the Arb with other instruments.

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