T3DSO2000A Manual. Page 33
A. Turn channel on/off
B. Coupling (DC, AC or GND)
C. Bandwidth limit (Full, 200 MHz or 20 MHz)
D. Probe attenuation (1X, 10X, 100X or custom)
E. Set the label text. Click to recall the label setting. Users can
customize the text and display of the label
F. Quickly apply a specified operation (Trigger, Cursor,
Measure, FFT, Search, Mask Test, Counter and AWG) to
current channel
G. Impedance: Select the input impedance
H. Units for the channel, Volts or Amps
I. Deskew one channel against another channel
J. Enable/disable invert
Coupling
•
DC: All of the input signal frequency components are passed
to the display.
•
AC: The signal is capacitively coupled. DC signal
components are rejected. See the Data sheet for details of
the cut-off frequency. AC coupling is suitable for observing
AC signals with DC offset, such as power ripple.
•
GND: The channel is grounded by an internal switch. GND coupling is used to
observe the zero offset error of the analog channels or determine the source of noise
in the waveform (from signal or from oscilloscope itself)
Bandwidth Limit
Full bandwidth will pass through signals with high-frequency components, but it also
means that noise with high-frequency components can pass through. When the
frequency component of a signal is very low, better signal-to-noise ratios (SNR) can be
obtained by enabling one of the available bandwidth limits. The T3DSO2000A provides
two bandwidth limit options: 20 MHz and 200 MHz. The bandwidth limit effectively lowers
the input frequency response of the input to the selected limit value.
Probe Attenuation
The T3DSO2000A provides 1X, 10X, 100X and custom probe attenuation factor options.
The custom values can be between 10
-6
to
10
6
.
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