Reference
90
TDS 200-Series Digital Oscilloscope User Manual
Key Points
GND Coupling. Use GND coupling to display a zero-volt waveform.
When you use GND coupling, the input BNC connector is discon-
nected from internal circuits. Internally, the channel input is
connected to a zero-volt reference level.
Fine Resolution. The vertical scale readout displays the actual
Volts/Div setting while in the fine resolution setting. Changing the
setting to coarse does not change the vertical scale until the
VOLTS/DIV control is adjusted.
U in Level and Delta Readouts. Vertical sensitivity should match on
waveforms used for math operations. If they do not match, and you
use cursors to measure the waveform result of a math operation, an U
displays that represents unknown.
Waveform off. To remove a waveform from the display, push the
MENU button for the channel to display its vertical menu. Push the
menu button again to turn the waveform off. An input channel can
still be used as a trigger source or for math displays while turned off.
Hard Copy
Push the HARDCOPY button to print a hard copy of the display. The
hard-copy function requires that an extension module with a
Centronics, RS-232, or GPIB port be installed and connected to a
printer.
Refer to the manual supplied with your extension module for
instructions on connections and using the module.
Refer to Optional Accessories on page 103 for information about the
available extension modules.
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