LeCroy LT342L Digital Storage Oscilloscopes, 500 MHz, 2 Channel

The LeCroy LT342L is a 500 MHz, 2-channel digital storage oscilloscope engineered for signal analysis, circuit validation, and fault diagnosis in electronics development and manufacturing environments. It delivers single-shot sampling to 500 MS/s with optional repetitive sampling to 25 GS/s, supported by 1 Mpoint/Ch acquisition memory for detailed waveform capture. The instrument combines precision vertical measurement (8-bit resolution, ±1.5% DC accuracy) with flexible triggering modes - including edge, glitch (down to 2 ns), width, interval, and window triggers - plus waveform math and FFT analysis capabilities.

Vertical sensitivity spans 2 mV/div to 10 V/div with selectable 25 MHz and 200 MHz bandwidth limiters. Timebase resolution reaches 5 ps interpolation across a 1 ns/div to 1000 s/div range. The ProBus interface provides automatic probe configuration for compatible LeCroy probe models.

Dual input impedance options (50 Ω or 1 MΩ) and configurable AC/DC coupling accommodate both high-impedance and 50 Ω terminated measurements. Standard connectivity includes GPIB, RS-232-C, Centronics, and external clock input to 500 MHz.

Technical Specifications

• Bandwidth: 500 MHz (-3 dB); selectable limiters at 25 MHz and 200 MHz per channel


• Channels: 2


• Sampling: Single-shot 500 MS/s; repetitive 25 GS/s


• Memory: 1 Mpoint/Ch (LT342L); standard configuration 250 kpts/Ch


• Vertical Resolution: 8 bits


• Sensitivity: 2 mV/div to 10 V/div


• DC Accuracy: ±1.5% (0.5% of full scale)


• Input Impedance: 50 Ω ±1.0% or 1 MΩ ±1.0% // 16 pF


• Input Coupling: AC, DC, GND (1 MΩ); DC, GND (50 Ω)


• Maximum Input: 5 Vrms (50 Ω); 400 Vmax peak AC + DC (1 MΩ)


• Timebase: 1 ns/div to 1000 s/div; 5 ps interpolation


• Clock Accuracy: ≤10 ppm


• Trigger Types: Edge, slope, window, line, glitch (2 ns), width (2.5 ns to 20 s), interval (10 ns to 20 s)


• Maximum Trigger Frequency: 500 MHz with HF coupling


• Pre-trigger Recording: 0–100% of horizontal scale


• Post-trigger Delay: 0–10,000 divisions


• Holdoff: Up to 20 s or 1 to 99,999,999 events

Key Features

• ProBus automatic probe configuration


• Waveform math and FFT analysis


• Analog persistence display


• External trigger input (±0.5 V, ±5 V)


• External clock input (≤500 MHz, 50 Ω or 1 MΩ)


• VGA output for external monitor connection

Typical Applications

• Analog and digital circuit design validation


• Signal integrity and timing analysis


• Transient event capture and characterization


• Intermittent fault detection via glitch and holdoff triggering


• Power supply and switching circuit evaluation

Compatibility & Integration

• GPIB, RS-232-C, and Centronics interfaces


• 10:1 10 MΩ passive probe (PP006) per channel


• External VGA monitor support


• Dual input impedance (50 Ω and 1 MΩ) for flexible signal coupling