Dataman 520 Series - Manual (Page 9)

DATAMAN 520 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 DATAMAN 520 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 host computer. Calibration data is part of the HW, which
makes it impossible to loose (opposed to the calibration data located on the
diskette/CD). 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 install the software.
The DATAMAN 520 series oscilloscopes allow the user to measure waveforms using
two independent channels with a 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 the 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 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 the
whole oscilloscope screen with a 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 DATAMAN 520 series oscilloscope has its own AD
converter. No channel multiplexing is used for dual channel operation. Data is stored
in the internal dual port buffer of the device. The computer continuously reads data as
fast as possible (depending mainly on the operating system and other tasks opened). If
the computer interrupts reading for a time longer then the time necessary to acquire a
higher amount of data than the capacity of the internal buffer a buffer overflow
occurs. This situation is indicated by a vertical red line. Probability of buffer overflow
is raised with higher sampling speed and higher number of running applications.
During data acquisition it is recommended to close all applications which are not
necessary for your current work.
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