What are the physical dimensions and weight differences between the 3401-F and 3402-F?

The single-channel 3401-F has dimensions of 439 mm × 88 mm × 375 mm and weighs 7.2 kg. The dual-channel 3402-F measures 439 mm × 89 mm × 390 mm and weighs 5.9 kg.

Can the 3402-F store user setups?

Yes, the 3402-F features instrument state storage capable of saving and recalling up to 10 complete setups.

Keithley Series 3400 Pulse/Pattern Generators

2 models with full specifications from Keithley.

The Keithley Series 3400 high-performance pulse/pattern generators are designed for high-speed digital testing and precise timing applications. Operating up to 165 MHz, these instruments provide engineers and technical buyers with flexible control over pulse parameters, clean low-jitter outputs, and robust pattern generation. The series includes the single-channel 3401-F and the dual-channel 3402-F, allowing users to choose the optimal output density and electrical specifications for their test setups.

Maximum Frequency: 165 MHz
Channel Configurations: 1 or 2 channels
Minimum Transition Time: < 1.5 ns (3401-F) / < 1.6 ns (3402-F)
Interfaces: GPIB, USB

Models in this series

Model	Type	Amplitude Accuracy	Amplitude Resolution	Data Formats
3402-F	Pattern	±(1% of setting + 20 mV)	3 digits or 10 mV	NRZ, RZ, R1
3401-F	Pattern	±(1% of setting + 20 mV) (50 Ω source into 50 Ω)	10 mV (50 Ω source into 50 Ω)	NRZ, RZ, R1

Shared Capabilities and Architecture

Both models in the Keithley Series 3400 deliver high-speed pulse and pattern generation with a focus on signal integrity and precise control. They operate across a broad temperature range of 0 °C to 50 °C and feature a universal AC power supply (100 V to 240 V AC, 47 Hz to 63 Hz) drawing a maximum of 120 VA. For automation and remote control, both generators come equipped with GPIB and USB interfaces, facilitating integration into standardized rack systems and automated test environments.

Comparing the 3401-F and 3402-F

While sharing high-frequency performance, the models differ in channel density, amplitude limits, and output flexibility:

Keithley 3401-F: This is a single-channel instrument. It offers selectable source impedance values of 50 Ω or 1 kΩ, enabling higher pulse amplitudes of up to ±10 V into a 50 Ω source impedance or up to ±20 V into a 1 kΩ source impedance. It supports operating modes including pulse, burst, pattern, and external width. The unit features a minimum rise time of < 1.5 ns (fixed) and a color graphic LCD.
Keithley 3402-F: This model provides two channels with a fixed transition time of < 1.6 ns. It features a nominal 50 Ω output impedance and delivers an amplitude range of 100 mV to 5.0 V into 50 Ω (up to 10.0 V into an open circuit). The 3402-F includes a backlit graphic LCD, a dedicated front-panel connector location, and internal storage for up to 10 complete instrument setups.

Frequently asked questions

What are the physical dimensions and weight differences between the 3401-F and 3402-F?: The single-channel 3401-F has dimensions of 439 mm × 88 mm × 375 mm and weighs 7.2 kg. The dual-channel 3402-F measures 439 mm × 89 mm × 390 mm and weighs 5.9 kg.
Can the 3402-F store user setups?: Yes, the 3402-F features instrument state storage capable of saving and recalling up to 10 complete setups.