The Keithley 3401-R is a single-channel pulse/pattern generator engineered for precise signal generation across component testing, signal simulation, and automated test system integration. It delivers programmable pulse control from sub-nanosecond to kilosecond timescales, with selectable output impedance and four operating modes including pulse, burst, pattern, and external width generation.
Technical Specifications
Frequency & Timing
• Frequency range: 1 mHz to 165 MHz
• Pulse period: 6.06 ns to 1000 s
• Pulse width: <3 ns to 1000 s (programmable)
• Rise/fall time: 2 ns minimum, adjustable <2.5 ns to 200 ms
• Delay: 0 to (period – 3.02 ns); fixed delay 22 ns nominal
• Period jitter (RMS): VCO 0.015% + 20 ps; PLL 0.001% + 15 ps
• Delay and width jitter (RMS): 0.01% + 15 ps
Amplitude & Output
• Output amplitude: ±10 V (50Ω); ±20 V (1kΩ); 100 mV to +10 V (50Ω into 50Ω); 200 mV to +20 V (1kΩ into 50Ω)
• Amplitude accuracy: ±(0.5% amplitude + 30 mV)
• Offset accuracy: ±100 mV
• Output impedance: Selectable 50Ω or 1kΩ
• Output resolution: 10 mV (50Ω into 50Ω); 20 mV (1kΩ into 50Ω)
• Short circuit current: ±400 mA
• Overshoot/pre-shoot/ringing: ±5% ±20 mV
Accuracy & Resolution
• Pulse width accuracy: ±0.5% ±250 ps typical (with self-calibration)
• Delay accuracy: ±0.5% ±0.5 ns typical (with self-calibration)
• Period accuracy: PLL ±0.01%; VCO ±0.5% typical
• Delay and width resolution: 3.5 digits (20 ps best case)
– Key Features
• Single-channel design for point-source signal generation
• Pattern generation with serial data simulation capability
• Programmable duty cycle control
• Reference oscillator: 10 MHz, 0 dBm typical input (20 dBm max); 1 V p-p typical output
– Typical Applications
• Component and device characterization
• Digital signal simulation and timing verification
• Pulse train generation for transient testing
• Serial pattern stimulus in automated test environments
– Compatibility & Integration
• Control via front-panel GUI, GPIB (IEEE 488.2, SCPI compliant), and USB
• Trigger Out, Strobe Out, Clock In, External In connectors
• Reference oscillator inputs/outputs on rear panel
• Universal input: 100–240 V, 50/60 Hz, 165 VA max
• Operating range: 0°C to 50°C; up to 80% RH at 35°C
• Dimensions: 439 mm W × 87 mm H × 393 mm D; 6.80 kg
