M570 series oscilloscope with rollmode
User’s Guide
2. Hardware
The information contained in this chapter will help you to understand the
features of your oscilloscope.
2.1. Hardware description
The M570 series of dual channel digital storage USB oscilloscopes connect to
the computer via USB. They are compatible with both USB 2.0 and USB 1.1.
Measurement accuracy is achieved by the stability of the parts used together with the
computing power of the computer. Calibration data are part of the HW, which makes
it impossible to loose them (oppose to the calibration data located on the diskette).
Therefore, it is possible to simply connect the hardware to any computer (via USB 1.1
or USB 2.0 interface). All you have to do is just install the software.
The M570 series oscilloscopes allow user to measure waveforms using two
independent channels with resolution of 8 bits and sensitivity from 10mV/div to
5V/div (80mVfs to 40Vfs) in 9 steps. One division of the oscilloscope screen contains
32 dots. Input impedance matches the oscilloscope standards, therefore any regular
oscilloscope probe (with minimum compensation range of 32pF) can be connected to
the device. The software supports 1:1, 1:10, 1:100 and 1:1000 probes. AC or DC
coupling and type of probe can be independently selected for each vertical channel.
Any input can be grounded without disconnecting the probes from the measured
system. Vertical track position can be controlled with accuracy of 1 pixel of the
oscilloscope screen. Measurement can be triggered from the Channel A and Channel
B and/or blocked from Channel A, Channel B and/or External ARM input. Trigger
and ARM threshold can be set independently for each channel in the range of whole
oscilloscope screen with resolution of one pixel. Threshold of the External ARM input
is fixed to about 1.5V (TTL and CMOS compatible).
Each measuring channel of the M570 series oscilloscopes has its own AD
converter. No channel multiplexing is used for dual channel operation. Data are stored
in the internal dual port buffer of the device. The computer continuously reads data as
fast as possible (depending mainly on the operational system and other tasks opened).
If the computer interrupts reading for time longer then the time necessary to acquire
higher amount of data then the capacity of the internal buffer the buffer overflow
occurs. This situation is indicated by vertical red line. Probability of buffer overflow
is raising with higher sampling speed and higher amount of running applications.
During data acquisition it is recommended to close all applications, which are not
necessary for your current work.
- 8 -
