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.
高速采集
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.
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.
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.
捕獲信號
采集系統
LC574AL帶寬(-3 dB)：50 ohm：DC to 1 GHz
帶寬(-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 LC574A.
No. of Channels：4
No. of Digitizers：4
最大采樣速率:2 ms,4 GS/s
LC574A靈敏度: 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 LC574A: 2.00 - 4.99 mV/div：?00 mV 5.00- 99 mV/div：? V 0.1 - 1.0 V/div：?0 V 1.0 - 10 V/div：?00 V (1 Mohm only)
DC精確度:1%(典型值)
垂直分解度：8 bits
LC574A帶寬限幅器：25 MHz, 200 MHz
輸入耦合：AC, DC, GND
輸入阻抗：10 Mohm//11 pF for LC374A/LC574A (system capacitance using
PP005) or 50 ohm.
最大輸入: 50 ohm：? V DC (500 mW) or 5 V RMS 1 Mohm on LC574A：400 V (DC + peak AC <=10 kHz)
SMART存儲器：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.
時基系統
時基：Main and up to 4 Zoom Traces
Time/Div Range：1 ns/div to 1,000 s/div.
時鐘精確度：<=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.
外部時鐘：<=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.
外部引用：Optional 10 MHz rear-panel input.
觀察信號
類型：Color 9" Raster Scan CRT, 0.26 mm dot pitch.
分辯率：640 x 480 points.
顯示范圍：170 mm x 125 mm - 50% greater than that of a 7" display.
控制：Rear-panel presets for position, brightness and contrast. Menu
controls for brightness and color selection.
柵格類型：Single, Dual, Quad, Octal, XY, Single+XY, Dual+XY, and Full Screen
- an enlarged view of each grid style.
柵格線：Internally generated; separate intensity control for grids and
waveforms. Selectable blending of grid with displayed traces.
波形類型：Dot Join with option-al sample point highlight or Dots only.
Trace Display：Opaque or transparent mode, with overlap management.
Number of Traces：8 (any mix of channels, memories or Math functions).
實時時鐘：Date, hours, minutes, seconds.
外接監視器：Rear-panel 15-pin socket for VGA compatible monitor.
Vertical Zoom：Up to 5x vertical ex-pansion (50x with averaging, up to 40 礦/div
sensitivity).
Horizontal Zoom: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.
觸發系統
觸發模式：Normal, Auto, Single, and Stop.
觸發源：CH1, CH2, CH3, CH4, Line, EXT, EXT/10. Slope, Level and Coupling are
unique to each source.
Slope：Positive, Negative.
耦合：AC, DC, HF, LFREJ, HFREJ
預置觸發器記錄：0 to 100% of full scale (adjustable in 1% increments).
后置觸發器延遲：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
LC574A外觸發最大輸入:10 Mohm//11pF(system capacitance using PP005):400 V (DC + peak AC <=10 kHz)
適時觸發：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觸發類型
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.
自校
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.
接口信息
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.
