LeCroy 9400A

SPECIFICATIONS
VERTICAL ANALOG SECTION
Bandwidth (- 3 dB):
@ 50 ~2: DC - 175 MHz at 10 mV/div, up to 225 MHz
at 1V/div;
DC - 150 MHz at 5 mV/div.
@ 1 M(2 AC: < 10 Hz- 100 MHz typical.
@ 1 M(~ DC: DC - 100 MHz typical.
Single shot: DC - 50 MHz (Nyquist).
Input impedance: 1 M~2//50 pF and 50 ~-2 + 1%.
Channels: Two; standard BNC connector inputs.
Sensitivity range: 5 mV/div to 1 V/div at 50 (2 impedance
and 5 mV/div to 5 V/div at 1 M~) impedance; detents at
1-2-5, 1 : 2.5 continuously variable.
Offset: + 8 divisions in 0.04 division increments.
DC accuracy: Standard _< + 2%, optional _< _+ 1%.
Noise: < 0.45% RMS.
Bandwidth limiter (- 3 dB): 30 MHz.
Max input voltage: 250 V (DC + peak AC) at 1 M~2, 5 V
(500 mW) or _+ 10V peak AC at 50 (~.
VERTICAL DIGITAL SECTION
ADCs: One per channel, 8-bit flash.
Conversion rate: Up to 100 megasamples/sec for transient
signals, up to 5 gigasamples/sec for repetitive signals, simul-
taneously on both channels.
Aperture uncertainty: _+ 10 psec.
Overall dynamic accuracy (typical): Sine wave applied to
the BNC input for RMS curve fit at 80% full scale. The accu-
racy measurement includes the front-end amplifier, sample
& hold and ADC.
Input frequency
Nyquist
(MHz) 1.0
10.0 50.0 100.0 175.0
Signal-to-noise
41.9 37.1 29.9
ratio (dB)
41.9 41.9
Effective bits 7.0 7.0 7.0
6.2 5.0
Acquisition memories, Channels 1 and 2: Two, 32K 8-bit
word memories (64K total) which can be segmented into
15, 31,62, 125 or 250 blocks.
Reference memories, C and D: Two, 32K, 16-bit word me-
mories (64K total) which can store two acquired and/or
processed waveforms.
Function memories E and F (optional): Two 32K, 16-bit
word memories (64K total) for waveform processing.
Glitch detection: Permanent glitch detection for events
down to 0.04% of the time-base setting, 10 nsec minimum.
HORIZONTAL SECTION
Time Base
Range: 2 nsec/div to 100 sec/div.
Accuracy: Better than + 0.002 % of the time-base setting.
Interpolator resolution: 10 psec.
Acquisition Modes
Random Interleaved Sampling (RIS) for repetitive signals
from 2 nsec/div to 2 #sec/div;
Single shot for transient signals and repetitive signals from
50 nsec/div to 200 msec/div;
Roll for slowly-changing signals from 500 msec/div to
100 sec/div;
Sequence for capturing transients in segmented memories
of 8, 15, 31,62, 125 or 250 blocks.
Trigger
Sources: CHAN1, CHAN2, LINE, EXT, EXT/10.
Slope: Positive, negative, window.
Coupling: AC, LF RE J, HF REJ, DC.
Modes:
Sequence: stores multiple events in segmented acquisi-
tion memories.
Auto: automatically re-arms after each sweep. If no trig-
ger occurs, one is generated at 2 Hz repetition rate.
Normal: re-arms after each sweep. If no trigger occurs
after 2 sec, the display is erased.
Single (hold): holds display after a trigger occurs. Re-
arms only when the "single" button is pressed again.
Pre-trigger: Adjustable in 0.2% increments, to 100%.
Post-trigger delay: Adjustable in 0.02 division increments
up to 10,000 divisions.
External trigger input: 1M,(2, < 30pF, 250V max., _+ 2V in
EXT, 4- 20V in EXT/10.
Rate: > 200 MHz.
SELF TESTS
Auto-calibration: Performed every 20 minutes or whenever
the gain or time-base parameters are changed; provides
accuracies of:
DC gain: + 2% (+ 1% optional) of full scale;
Offset: + 0.5% of full scale (50~ only);
Time: 20 psec RMS.
During the warming-up period, auto-calibration is carried out
at 1 minute intervals unless the oscilloscope is in single or
sequence trigger mode.
DISPLAY
CRT: 12.5 x17.5 cm (5 x 7 inches); magnetic deflection; vec-
tor graphics system.
Resolution: 1024 x 1024 addressable points.
Grid: Internally generated; separate intensity control for grid
and waveforms. Single and dual grid mode.
Expansion: Dual zoom horizontal expansion operates simul-
taneously on live, stored and processed waveforms,
expanding up to 100 times. Vertical expansion from 0.4 up to
2 times for non-processed waveforms, up to 10 times for
processed waveforms.
Screen dump: Single or multi-pen digital plotters are menu
selected. The 9400A supports the HP 7400 series, as well as
the Tektronix 4662, Philips PM 8151, Graphtek WX 4638/6,
and compatible models. Screen dumps are activated by a
front-panel push-button.
Cursors: Two time cursors give time resolution of + 0.2% of
full scale for unexpanded traces; up to + 0.002% for expan-
ded traces. The corresponding frequency information is also
provided. Two voltage cursors measure voltage differences
to 0.2% of full scale for each trace.
A cross-hair marker measures absolute voltage versus
signal ground as well as the time relative to the trigger.