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Tektronix TDS 220 Oscilloscope Operating Instructions

1). Press the White POWER Button located on top of the O-Scope behind the Tektronix name. The Scope will perform a Power-On Self-Test. If nothing happens, make sure that the Scope is plugged in. The Scope will initialize the display with the last settings that were used before the Scope was previously turned off. 2). Connect your input signal to CH 1 (Channel 1). If you have a second input signal, connect it to CH 2 (Channel 2) 3). Press the AUTOSET Button. The Scope will select parameters, and display the waveform(s).

This Scope uses Labeled Buttons to select Menus and Unlabeled Buttons to change the parameters within each menu. The five Unlabeled Buttons are to the right of the Display. The items within the column on the
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right side of the display are the menu parameters. Decide which parameters you wish to change, and select the appropriate Labeled Button. Expanded information can be found in the Tektronix TDS 200-Series User Manual. See page 65 for a Reference List of each Front Panel Labeled Menu Button, and the associated page number explaining the Unlabeled Button Menu options. Copies of this manual can be found in the upper left-hand corner of the Oscilloscope Storage Cabinet, and in the Service Manuals Filing Cabinet in Joyner's office. Look for the Tektronix TDS 220 Oscilloscope folder in the second drawer from the top. To change Channel 1 Waveform Parameters: Press CH 1 MENU. CH1 appears above the right column.

Make the following selections with the Unlabeled Buttons: (TDS-200 User Manual, Page 89). Coupling: Choose AC, Ground, or DC. Bandwidth Limit: Choose OFF if you want a 100 MHz display. Choose ON for a 20 MHz display. Volts/Div: "Selects the resolution of the VOLTS/DIV KNOB". Choose Coarse to get the standard 1-2-5 sequence. "Fine changes the resolution to small steps between the coarse settings." Probe: Select 1X when connecting input signal(s) to the Scope with BNC Cables, Patch Cords, or any wires that do not have a Series Resistor between the signal and the Scope. When using a Scope Probe, select 1X or 10X Attenuation on the Probe, and make the same selection on the Scope. Invert: Choose OFF for a Normal Display. Choose ON when using the Math function to subtract one channel from the other. Turn the VOLTS/DIV Knob to change the displayed amplitude of the waveform. Turn the POSITION Knob to move the waveform up or down. The Arrow on the left side of the display indicates the position of the waveform. Channel 1 can be toggled On or Off by pushing the CH 1 MENU Key. Channel 2 can also be turned ON and Off by pushing the CH 2 MENU Key.
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To set the TRIGGER Parameters, press the TRIGGER MENU Button in the TRIGGER Column on the right side of the Scope.

Choose Edge Triggering. Video Triggering is used for NTSC, PAL, and SECAM Television Signals. Slope: "Select to trigger on either the Rising or Falling edge of the signal." Source: "Select the input source as the trigger signal." CH1, CH2, EXT (External), or EXT/5." Mode: Select Auto, Normal, or Single Sweep. "Use Normal trigger mode to trigger only on a valid trigger. "Use Auto trigger mode to let the acquisition free-run in the absence of a valid trigger. "Auto allows an untriggered scanning waveform at 100ms/div or slower time base settings. "Use Single trigger mode to capture a single acquisition of an event." Coupling: Choose AC, DC, Noise Reject, High Frequency Reject, or Low Frequency Reject. Press the RUN/STOP Button above the Trigger Column to stop the signal acquisition and continually display the last acquired signal. Press the button again to restart signal acquisition. (See Picture on the next page) To Change the Horizontal (X-Axis) Timebase, turn the SEC/DIV Knob to the left for a slower sweep, or to the right for a faster sweep. Turn the Horizontal POSITION Knob to move the entire waveform left or right. The Sec/Div time is displayed at the bottom of the screen to the right of the middle Y-Axis. The Position arrow is at the top of the display. Refer to the left portion of the picture below. These two controls should meet all of the needs of the present lab experiments. Refer to the TDS-200 User Manual, page 74 for a further explanation of the Horizontal Menu Keys.

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To make desired Measurements appear in the right column, press the MEASURE Menu Key. With the top Unlabeled Button, select Source. The selected item appears in inverse video. Choose either Channel 1 or Channel 2 for each of the following Unlabeled Buttons.

Then press the top Soft Button to select Type. You can choose from the following seven items by pushing each Soft Key until the desired type of measurement appears: Frequency, Time Period per cycle, Statistical Mean Voltage Value, Pk-Pk (Peak-to-Peak Voltage), Cycle RMS Voltage Value, and None. See TDS 200 User's Manual, Page 79. For information on other menus, refer to the TDS 200 User's Manual. See Page 65 Menu Index Page. All quotations above were taken from the Tektronix TDS 200-Series User Manual Location = C:\Files\364 Lab\Equipment Op Instructions\TekTDS220 Oscilloscope.doc
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