Yokogawa DL1740 Digital Oscilloscope, 4-Channel, 500MHz

The Yokogawa DL1740 is a 4-channel digital oscilloscope delivering 500 MHz bandwidth with real-time sampling up to 1 GS/s (with 2-channel interleaving) or 500 MS/s standard operation. Deep memory - 1 MW per channel with interleaving, 500 kWord without - captures extended signal sequences for transient analysis and detailed waveform characterization. Dual input impedance (1 MΩ and 50 Ω) with switchable bandwidth limiting (100 MHz or 20 MHz per channel) accommodates diverse measurement scenarios.

The 6.4-inch color TFT display refreshes up to 60 screens/s in all-points mode, enabling real-time signal observation. Comprehensive connectivity includes USB, Ethernet (optional), GP-IB, RS-232 serial (optional), SCSI (optional), and external trigger/clock inputs, supporting seamless laboratory integration and remote control.

Technical Specifications

• Bandwidth: 500 MHz


• Channels: 4 analog


• Real-Time Sampling Rate: 1 GS/s (2-channel interleaving); 500 MS/s (standard)


• Record Length: 1 MW per channel (interleaving enabled); 500 kWord per channel (interleaving disabled)


• Input Impedance: 1 MΩ ±1.0% or 50 Ω ±1.0% (selectable)


• Vertical Sensitivity: 50 Ω: 2 mV to 1 V/div; 1 MΩ: 2 mV to 10 V/div (1, 2, 5 mV steps)


• Maximum Input Voltage: 1 MΩ input (≤1 kHz): 400 V DC+AC peak / 282 Vrms CAT II; 50 Ω input: 5 Vrms max, 10 Vpeak max


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


• Input Filter: 100 MHz or 20 MHz bandwidth limiting per channel


• Sweep Time: 1 ns to 50 s/div (10 kWord+ record length)


• Timebase Accuracy: ±0.005%


• A/D Conversion: 8-bit resolution


• DC Accuracy: ±(1.5% of 8 divisions + voltage-axis offset error)


• External Clock: 40 Hz to 20 MHz input capability

Key Features

• Dual-impedance front end (1 MΩ / 50 Ω) for matched source coupling


• Per-channel bandwidth limiting reduces noise in narrowband measurements


• High-speed interleave mode doubles effective sampling rate on two channels


• Deep waveform memory supports long-duration captures without resampling


• Trigger output (TTL) and external trigger/clock/gate inputs for instrument synchronization

Display & Connectivity

• 6.4-inch color TFT LCD; 640 × 480 full resolution, 500 × 384 waveform display


• Screen refresh: 60 screens/s (10 kWord all-points); 30 screens/s (1 MW all-points)


• USB 1.0, Ethernet (10BASE-T / 100BASE-TX, optional), GP-IB, RS-232 (optional), SCSI (optional)


• Floppy disk, Zip drive, PC Card Type II (optional), USB storage, RGB video output

Typical Applications

• High-speed digital and analog circuit characterization


• Power supply transient and ripple analysis


• Protocol signal capture and timing validation


• Long-duration environmental monitoring and logging