Teledyne LeCroy LC374A Details

Teledyne LeCroy LC374A

Bandwidth: 500.0 MHz Channels: 4

Leading Specifications

Digital oscilloscopes from LeCroy are designed to save engineers valuable time in troubleshooting and problem-solving.

Each oscilloscope is an integrated and powerful system providing the capability to:

• Capture the key events with high resolution for longer time intervals

• View data like never before, giving you more information more quickly, with a large, color CRT and advanced display techniques

• Analyze your signal to get answers quickly and more accurately with a powerful processing system and math packages.

• Eight trace display for a more complete picture.

9" Color Display

LeCroy provides a very large, sharp oscilloscope screen that is 50% larger in total viewing area than a 7" screen.

Its powerful features include Analog Persistence, Color-Graded Persistence, Full Screen mode, Opaque or Transparent display, color association, and personal color schemes. These provide the user with outstanding benefits that accelerate visual processing and effective communication of on-screen information.

High-Speed Acquisition

The design and debug of fast digital systems and the need to capture fast transient signals require high-speed signal capture. The LC574A four-channel, 1 GS/s, 1 GHz bandwidth DSO operates at a 4 GS/s sample rate for single-channel inputs. The high sample rate, bandwidth and the 1 GHz trigger bandwidth provide a flexible solution for capturing and viewing fast risetime signals.

Large Sample Rate Window

Having a high sample rate in a DSO is only the first step to preserving data integrity. The time window over which this sample rate is available is also of critical importance. Long acquisition memory maintains the oscilloscope's highest sample rate for large time windows allowing the user to sample long signals with high horizontal resolution.

With up to 8 million points of acquisition memory, the maximum sample rate of the LC574AL of 4 GS/s (2 GS/s in LC334AL) is maintained for a time window of 2 ms (4 ms in LC334AL). This sample rate window enables the user to record long signals with high resolution.

Optimum Performance

SMARTMemory is a total memory management system that dynamically allocates resources of microprocessor power, acquisition memory and processing RAM. The intelligent management provided by SMARTMemory guarantees optimal usage of oscilloscope resources.

The 96 MHz PowerPC microprocessor at the heart of these DSOs drives the system to produce results fast, providing rapid waveform update and super panel responsiveness.

Quick Diagnoses

Capturing and viewing waveforms are fundamental to an oscilloscope. Productivity improvements are accessible by using built-in math functions to assist troubleshooting and diagnoses of circuit problems.

The signal analysis capability of these DSOs is enhanced by advanced waveform math, spectrum analysis, and waveform parameter analysis. This analysis capability greatly increases the speed with which circuit problems are clearly identified and solved.

Analog Persistence

At a push of the green button, the user can switch between an analog style view and a digital view of signals on these oscilloscopes.

The depth of signal information can be explored along the third dimension of the waveform display to give the user a complete picture of waveform activity.

Unlike an analog oscilloscope, all signal data is captured and available in memory for analysis and measurements. Analog Persistence gives the user the best of both the analog and digital worlds of oscilloscopes.

Full Screen Grid

LeCroy DSOs not only have a very large 9" screen but also provide a display mode with an extra-large grid, up to 150% larger than common grid areas. In Full Screen mode, all of the screen area is used to display signals. This provides a magnificent view of up to 8 waveforms: signal details are seen more clearly and with greater ease.

8-Trace Display

An 8-trace display with any combination of math functions, zooms, reference memories, or channels is a standard feature in the LC series.

Octal grid display is available in normal and Full Screen display modes, with and without parameters displayed.

Easy Documentation

All waveform data and results of analysis can be quickly saved to floppy disk, memory card, ATA flash card, or a removable hard disk. This provides an efficient way to archive information and facilitates easy documentation of results.

An internal graphics printer (standard in "L" models) outputs screen dumps in seconds providing the user with an immediate and clear record of signal activity.

Signal Capture

Acquisition System

LC334A Bandwidth (-3 dB): @ 50 ohm: DC to 500 MHz

LC574A Bandwidth (-3 dB): @ 50 ohm: DC to 1 GHz

Bandwidth (-3 dB): @ 1 Mohm: DC to 500 MHz typical at probe tip with optional 1 GHz FET probe for LC334A and with PP005 standard with LC374A and LC574A.

No. of Channels: 4

No. of Digitizers: 4

Max. Sample Rate Window:

4 ms @ 2 GS/s in single-shot mode; LC334AL. 2 ms @ 4 GS/s; LC574AL.

Sensitivity LC334A:

2 mV/div to 5 V/div, 50 ohm, fully variable. 2 mV/div to 5 V/div, 1 Mohm, fully variable.

Sensitivity LC574A:

2 mV/div to 1 V/div, 50 ohm, fully variable. 2 mV/div to 10 V/div, 1 Mohm, fully variable.

Scale factors: A wide choice of probe attenuation factors are selectable.

Offset Range LC334A:

2.00 - 9.99 mV/div: ±120 mV 10.0 - 199 mV/div: ±1.2 V 0.2 - 5.0 V/div: ±24 V

Offset Range LC574A:

2.00 - 4.99 mV/div: ±400 mV 5.00- 99 mV/div: ±1 V 0.1 - 1.0 V/div: ±10 V 1.0 - 10 V/div: ±100 V (1 Mohm only)

DC Accuracy: Typical 1%

Vertical Resolution: 8 bits

Bandwidth Limiter LC334A: 30 MHz

Bandwidth Limiter LC574A: 25 MHz, 200 MHz

Input Coupling: AC, DC, GND

Input Impedance: 10 Mohm//15 pF for LC334A (system capacitance using PP005), 10 Mohm//11 pF for LC374A/LC574A (system capacitance using PP005) or 50 ohm ±1%.

Max Input:

50 ohm: ±5 V DC (500 mW) or 5 V RMS 1 Mohm on LC334A: 250 V 1 Mohm on LC574A: 400 V (DC + peak AC <=10 kHz)

SMARTMemory: This total memory management system dynamically manages acquisition memory to guarantee that signals are always sampled at the highest possible sample rate and that system RAM and microprocessor resources are always optimally employed.

Acquisition Modes

Random Interleaved Sampling (RIS): For repetitive signals from 1 ns/div to 5 s/div (2 s/div for LC574A).

Single shot: For transient and repetitive signals from 10 ns/div (1 ns/div for  LC574A) with all channels active.

Peak detect: At 400 MS/s, peak detect can capture high-speed events down to 1 ns, while simultaneously capturing normally sampled data.

Sequence: Stores multiple events - each of them time stamped - in segmented acquisition memories.

Dead Time between segments: Typically <30 s, max. 50 s

Timebase System

Timebases: Main and up to 4 Zoom Traces

Time/Div Range: 1 ns/div to 1,000 s/div.

Clock Accuracy: <=10 ppm

Interpolator resolution: 10 ps

Roll Mode: Ranges 500 ms to 1,000 s/div. For >50 kpoints: 10 s to 1,000 s/div.

External Clock: <=100 MHz (20-100 MHz for LC574A and LC374A) on EXT input with ECL, TTL or zero crossing levels. Optional 50 MHz to 500 MHz rear-panel fixed frequency clock input.

External Reference: Optional 10 MHz rear-panel input.

Additional Information

Interfacing

Remote Control: Possible by GPIB and RS-232-C for all front-panel controls, as well as all internal functions.

RS-232-C Port: Asynchronous up to 115.2 Kb/s for computer/terminal control or printer/plotter connection.

GPIB Port: Configurable as talker/listener for computer control and fast data transfer, up to 300 kbytes/sec. Command Language complies with requirements of IEEE-488.2.

Centronics Port: Hardcopy parallel interface is standard.

PC Card (PCMCIA I/II/III) Ports: For memory cards, ATA compatible flash cards and removable hard disks - optional.

Floppy Disk: High-density 3.5" floppy disk drive (DOS format) is standard.

VGA Compatible Display: 15-pin D-type VGA compatible connector for external color display.

Hardcopy: Screen dumps are activated by a front-panel button or via remote control. TIFF and BMP formats are available for importing to desktop pub-lishing programs. The following printers and plotters can be used to make hardcopies:

B/W: HP LaserJet, HP DeskJet 500, Epson FX.

Color: HP DeskJet 550C, Epson Stylus, Canon BJC. An optional, internal, high- resolution graphics printer is also available for screen dumps; a stripchart output format with 2 meters per division is also possible.

Output Formats: ASCII waveform out-put is available in seconds, compatible with spreadsheets, MATLAB, MathCad. Binary output is also available.

General

Auto-calibration ensures specified DC and timing accuracy.

Temperature: 5 to 40 C (41 to 104 F) rated 0 to 50 C (32 to 122 F) operating.

Humidity: 80% for temperatures up to 31 C decreasing linearly to 50% relative humidity at 40 C.

Altitude: Up to 2000m (operating), 40 C max.

Power: 90-132 V AC, 180-250 V AC, 45-66 Hz, 400 W.

Battery Backup: Front-panel settings maintained for two years.

Dimensions:

(HWD)10.4" x 15.65" x 17.85" (264 mm x 397 mm x 453 mm)

Weight: 20 kg (44 lbs) net, 28 kg (61.6 lbs) shipping.

Warranty: Three years.

CE Approval: EMC: Conforms to EN50081-1 and EN50082-1.

UL and cUL approved: UL standard: UL 3111-1; cUL Canadian Standard CSA-C22.2 No. 1010. 1-92.

Safety: The oscilloscope has been designed to comply with EN61010-1 Installation Category (Over-voltage Category) II, Pollution Degree 2.

Signal Viewing

Type: Color 9" Raster Scan CRT, 0.26 mm dot pitch.

Resolution: 640 x 480 points.

Display Area: 170 mm x 125 mm - 50% greater than that of a 7" display.

Controls: Rear-panel presets for position, brightness and contrast. Menu controls for brightness and color selection.

Grid Styles: Single, Dual, Quad, Octal, XY, Single+XY, Dual+XY, and Full Screen - an enlarged view of each grid style.

Graticules: Internally generated; separate intensity control for grids and waveforms. Selectable blending of grid with displayed traces.

Waveform Style: Dot Join with option-al sample point highlight or Dots only.

Persistence Modes: Color-graded per-sistence and Analog Persistence, infinite or variable with decay over time. In color-graded persistence, a color spectrum from red through violet is used to map signal intensity. With Analog Persistence, the brightness level of a single color denotes signal intensity. Each trace's persistence data is stored in 64 k levels. Analog Persistence is only available in four channel mode on LC334A models.

Trace Display: Opaque or transparent mode, with overlap management.

Number of Traces: 8 (any mix of channels, memories or Math functions).

Real-time Clock: Date, hours, minutes, seconds.

External Monitor: Rear-panel 15-pin socket for VGA compatible monitor.

Vertical Zoom: Up to 5x vertical ex-pansion (50x with averaging, up to 40 V/div sensitivity).

Horizontal Zoom: LC334A: Waveforms can be expanded to give 2-2.5 points/division. This allows zoom factors up to 100,000x for the 'M' models and up to 400,000x for the 'L' models when channels are combined.

LC574A: Waveforms can be expanded to give 0.4-0.5 points per division. Zoom factors up to 2,000,000x with all channels combined on the LC574AL.

Triggering System

Modes: Normal, Auto, Single, and Stop.

Sources: CH1, CH2, CH3, CH4, Line, EXT, EXT/10. Slope, Level and Coupling are unique to each source.

Slope: Positive, Negative.

Coupling: AC, DC, HF, LFREJ, HFREJ

Pre-trigger recording: 0 to 100% of full scale (adjustable in 1% increments).

Post-trigger delay: 0 to 10,000 divisions (adjustable in 0.1 div. increments).

Holdoff by time: 10 ns to 20 s

Holdoff by events: 0 to 99,999,999

Internal Trigger Range: ±5 div

EXT Trigger Max Input LC334A:

10 Mohm//15 pF (system capacitance using PP005): 50 V (DC + peak AC <=10kHz)

50 ohm ±1%: ±5 V DC (500 mW) or 5 V RMS.

EXT Trigger Max Input LC574A:

10 Mohm//11pF (system capacitance using PP005): 400 V (DC + peak AC <=10 kHz)

50 ohm ±1%: ±5 V DC (500 mW) or 5 V RMS.

EXT Trigger Range: ±0.5 V (±5 V with Ext/10).

Trigger Timing: Trigger Date and Time are listed in the Memory Status Menu.

Trigger Comparator: Optional ECL rear-panel output. Alternatively, the calibrator output can provide a trigger output or a Pass/Fail test output.

SMART Trigger Types

Pattern: Trigger on the logic combination of 5 inputs - CH1, CH2, CH3, CH4, and EXT Trigger, where each source can be defined as High, Low or Don't Care. The Trigger can be defined as the beginning or end of the specified pattern.

Signal or Pattern Width: Trigger on width between two limits selectable from <2.5 ns to 20 s. Will typically trigger on glitches 1 ns wide.

Signal or Pattern Interval: Trigger on interval between two limits selectable from 10 ns to 20 s.

Dropout: Trigger if the input signal drops out for longer than a time-out from 25 ns to 20 s.

State/Edge Qualified: Trigger on any source only if a given state (or transition) has occurred on another source. The delay between these events can be defined as a number of events on the trigger channel or as a time interval.

TV: Allows selection of both line (up to 1500) and field number (up to 8) for PAL (SECAM), NTSC or nonstandard video.

Exclusion Trigger: Trigger on inter-mittent faults by specifying the normal width or period of a signal. The oscillo-scope will trigger only on aberrations which are shorter or longer than normal.

Autosetup

Pressing Autosetup sets timebase, trigger and sensitivity to display a wide range of repetitive signals, (Frequency above 50 Hz; Duty Cycle greater than 0.1%).

Autosetup Time: Approximately 2 seconds.

Vertical Find: Automatically sets sensitivity and offset for selected channel.

Probes

One PP005 probe is supplied per channel. DC to 500 MHz typical (350 MHz typical for LC334A) at probe tip, 500 V max.

Probe calibration: Max 1 V into 1 Mohm, 500 mV into 50 ohm, frequency and amplitude programmable, pulse or square wave selectable, rise and falltime 1 ns typical. Alternatively, the calibrator output can provide a trigger output or a Pass/Fail test output.

 

• 500 MHz and 1 GHz Bandwidth
• 2 GS/s and 4 GS/s Single- Shot Sample Rate
• 8 Million Points of Acquisition Memory
• 4 ms Maximum Sample Rate Window
• 96 MHz PowerPC Microprocessor
• 8 to 64 MB System RAM
• 9" Color Display with 8 Traces
• Analog Persistence
• Full Screen Grid