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150MHz Isolated Digital Storage Scope, USB PC based US$1,415.95

M774/RM
150MHz Isolated Digital Storage Scope, USB PC based


  • USB 2.0 and USB 1.1 compatible
  • Opto Isolated from computer
  • Dual channel with 150 MHz bandwidth
  • Deflection factor: 10mV/div to 5V/div in 1-2-5 sequence
  • Max real time sampling rate 100 MS/s
  • Max equivalent sampling rate 10 GS/s
  • Large internal memory: 1Msample each channel
  • Software for Windows 98SE, Windows ME, Windows 2000, Windows XP, Windows Vista, and Windows 7.

Part of the ETC Measuring Lab 3 (EML3) series, the M774 is a dual-channel USB digital storage oscilloscope (DSO) compatible with USB 2.0 and USB 1.1 interfaces. The computer connection is isolated up to 500Vp from the measuring circuits of the oscilloscope. Ease of installation and the USB connection to a computer make this DSO extremely portable. The storage scope is powered by the USB bus; its low, maximum power consumption of 2.35W makes this oscilloscope an ideal choice for use with a battery-powered notebook in the field.

The scope inputs are accessible via BNC connectors and are compatible with standard probes (with minimum of 30 pF compensation range). Internal storage (1M samples per channel) is used as a fast data buffer to store a measured waveform.

M774 Software

The PC control software included with the scope provides full control of the DSO. All standard features of modern DSOs (hold acquisition process, hold-off, zoom etc.) and many more (saving/loading the waveforms for future use, export to clipboard, printing the results together with scope settings) are available. The fast USB2.0 data transfer offers extremely rapid display refresh, creating the impression of an analog instrument.

Four standard acquisition modes (AUTO, NORMAL, SINGLE, MANUAL) are available. The trigger event is created by a dual level triggering system equipped with digital pulse length filter and event counter on each level. Channel A, channel B and the external trigger input can be selected as trigger sources. The threshold of the channel A and channel B triggers is settable over the entire range of the scope screen. The threshold of the external trigger is fixed to about 1.5V and is TTL and CMOS compatible. The sophisticated triggering system allows to display waveforms with very complex trigger events (i.e. row of a video signal).

The time base in 1:1 display mode (no zoom) is settable from 5ns/div to 100ms/div in sequence of 1-2-5. It is possible to set the time base from 625ps/div to 204.8s/div using different zoom settings.

The M774 Roll Mode allows you to turn the oscilloscope into a data logger (the amount of acquired data that can be stored only depends on the available free disk space of your computer).

A printed installation guide and a detailed user’s guide on CD are part of the M774 package. Integrated tool tips make the PC software easy to use. Compatible with Windows 98SE, Windows ME, Windows 2000, Windows XP and Windows Vista operating systems. The oscilloscope screen can be resized according to your monitor resolution (minimum 800x600).

Optional Development Software

The M774 Development kit (optional software package) is available, which allows you to write your own application software that interfaces to the storage scope.

M774 Isolated Digital Storage Scope Features

Vertical deflection system

No. of divisions 8
No. of pixels per division 32
Deflection factor range 10mV/div to 5V/div in 1-2-5 sequence
Accuracy ±2% of current value + 1 pixel
Resolution 8 bits (0.39%)
Frequency response (-3dB) DC: 0-150 MHz, AC: 1.2 Hz-150 MHz
Step response rise time max. 2.4 ns
Channel isolation min. –60 dB
Resistance 1 MΩ +5%, -2%
Input resistance inaccuracy adjustment Digital for absolute accuracy ±2% of current voltage + 1 pixel
Capacitance 28 pF ±2 pF
Zero setting accuracy ±2% of the screen
Maximum input voltage ±200V at 100 kHz or less

Triggering

System type Dual level
Trigger source for primary level selectable Channel A, Channel B or external trigger input
Trigger source for secondary level selectable Channel A, Channel B or external trigger input
Threshold setting Channel A and Channel B on the whole display range. External fixed on about 1.5V
Slope selection Leading or trailing edge independently on each source
Minimum trigger pulse period 5 ns
Minimum trigger pulse length 2.5 ns
Maximum voltage on external trigger input –10V to +13V at 20 kHz or less
Adjustments Digital filter with valid pulse length settable up to 131072*Ts for each level and counter of valid triggering events settable from 1 to 32768 for each level. HOLD-OFF settable up to 1048576*Ts with selectable AUTO mode, to sample proper amount of data before trigger. (Ts – actual real-time sampling period.)

Data acquisition system

No. of divisions 10
No. of pixels per division 50
Mode of operation Sampling before and after trigger with continual selection of the trigger position
Record length Settable from 1024 to 1048576 (1M) samples for each channel
Time base range in 1:1 mode 5 ns/d to 100 ms/d in 1-2-5 sequence
Time base range using different ZOOM modes 625 ps/d to 204.8 s/d
Time base accuracy 0.01% to 100ns/d, 0.5% for 50ns/d to 5ns/d
Real-time sampling frequency 1 kHz to 100 MHz
Equivalent sampling frequency 1 kHz to 10 GHz
Display range with respect to trigger event 1048576 samples before and 1048576 samples after trig. event in length of 1048576 samples

Probe compensation generator

Output connector BNC, together with External trigger input
Output impedance 1kΩ to parallel with 10nF and approx. 50Ω serial
Output waveform Pulse with 1:1 duty cycle
Frequency 1465 Hz
Output voltage (no load) 3.3V ±5%

Power

Power source USB interface via USB cable (power ground isolated from ground of measuring inputs)
Max. current 470 mA

Insulation specification

Maximum working voltage 500Vp while the voltage [V] * frequency [Hz] factor must not exceed 50000 [V Hz]
Resistance > 2GΩ
Capacitance Approx. 150pF

Mechanical characteristics

Dimensions without feet and connectors 165 × 111 × 35 mm
Dimensions with feet and connectors 182 × 111 × 39 mm
Weight 550 g

M774 Package Contents

  • M774 device
  • USB cable
  • Safety grounding cable
  • Installation guide
  • CD with software and user’s guide

Digital Storage Oscilloscope Documentation

Kits containing the M774

You may want to consider the following kits that feature the M774 with probes and carrying case with protective foam inserts.
  • K774 — M774/RM with two 200MHz/1:1:10 switchable oscilloscope probes
  • KUNI — M774/RM with two 200MHz/1:1:10 switchable oscilloscope probes and one 150MHz/1:100 oscilloscope probe
  • KPWR — M774/RM with two 150MHz/1:100 oscilloscope probes and one 200MHz/1:1:10 switchable oscilloscope probe

M774 Isolated Oscilloscope Add-On Option

The Development Kit is an API allowing you to add control functions for the scope in your own software applications. It works in Windows 98SE, Me, 2000, XP and Vista. It comes with descriptions and examples of all libraries written in Inprise Delphi, Borland C++ and Microsoft Visual Basic.




Available Options:
Add-On:

Optional Recommended Products for this Item
Oscilloscope Probe, 1:1 & 1:10, 200MHz+ US$105.00
Control Panel for M520/M570/M590/M770 Oscilloscopes, mini-USB+ US$130.95

This product was added to our catalog on Thursday 29 January, 2009.

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