Ametek / VTI Instruments / VXI Technology VM3640A 50 MSa/s Arbitrary Waveform Generator

The Ametek VTI Instruments VM3640A is a high-performance VXIbus arbitrary waveform generator delivering precise signal synthesis at sampling rates up to 50 MSa/s with 12-bit resolution. Built on direct digital synthesis, it generates standard waveforms including sine, square, ramp, triangle, noise, pulse, sinc, exponential rise/fall, and cardiac signals. Sine and square waves reach 20 MHz, while other built-in waveforms operate to 1 MHz. Custom arbitrary waveforms load from up to 120 k points of onboard memory, with optional 512 k point expansion. Sine wave harmonic distortion remains below 0.5%, and both amplitude and frequency accuracy meet 5-digit and ±0.01% specifications respectively. The VM3640A integrates into the VMIP™ family as a C-size module, supporting up to three independent channels per card and synchronous operation across multiple units.

– Technical Specifications

• Sampling Rate: 50 MSa/s maximum
• Resolution: 12-bit
• Arbitrary Waveform Memory: 120 k points standard; optional 512 k points
• Standard Waveforms: Sine, Square, Ramp, Triangle, Noise, Pulse, Sinc, Exponential Rise/Fall, Cardiac
• Sine and Square Wave Frequency: Up to 20 MHz
• Other Built-in Waveforms: Up to 1 MHz
• Sine Wave Harmonic Distortion: ≤0.5%
• Amplitude Accuracy: 5 digits (sine, square, and all other waveforms)
• Frequency Accuracy: ±0.01% typical
• Output Filters: Programmable

– Key Features

• Three independent channels per C-size VXI module
• Modulation support: Amplitude, FSK, PSK
• Trigger inputs via VXIbus TTL lines and front panel
• Marker output for waveform synchronization
• Horizontal sweep output in sweep mode
• External reference clock input and lock capability
• VXIplug&play driver support with SCPI and IEEE-488.2 compatibility
• Pseudo-register access for accelerated data transfer

– Typical Applications

• Multi-channel arbitrary waveform generation with internal frequency locking
• Precision RF and analog signal synthesis
• Custom waveform generation for test automation
• Integrated test systems combining arbitrary waveforms with digitizers, counters, and multimeters

– Compatibility & Integration

Fully compatible with VXIbus architecture and VMIP™ product family. Combines with other VXI C-size instruments. Multiple units support synchronized operation for multi-channel applications.