Оценок - 3, средний балл: 4.7
(
)
)
|
Фрагмент инструкции
The default configuration returns the oscilloscope to its default settings. This places the oscilloscope in a known operating condition. The major default settings are: Horizontal main mode, 100 .s/div scale, 0 s delay, center time reference. Vertical (Analog) Channel 1 on, 5 V/div scale, DC coupling, 0 V position, 1 M. impedance, probe factor to 1.0 if an AutoProbe probe is not connected to the channel. Trigger Edge trigger, Auto sweep mode, 0 V level, channel 1 source, DC coupling, rising edge slope, 60 ns holdoff time. Display Vectors on, 33% grid intensity, infinite persistence off. Other Acquire mode normal, Run/Stop to Run, cursors and measurements off. Labels All custom labels that you have created in the Label Library are preserved (not erased), but all channel labels will be set to their original names. 6000 Series Oscilloscope User’s Guide Agilent 6000 Series Oscilloscope User’s Guide 3 Viewing and Measuring Digital Signals To connect the digital probes to the circuit under test 112 Acquiring waveforms using the digital channels 115 To display digital channels using AutoScale 116 Interpreting the digital waveform display 118 To switch all digital channels on or off 119 To switch groups of channels on or off 119 To switch a single channel on or off 119 To change the displayed size of the digital channels 120 To reposition a digital channel 120 To change the logic threshold for digital channels 121 To display digital channels as a bus 122 Agilent Technologies Viewing and Measuring Digital Signals To connect the digital probes to the circuit under test The digital channels are enabled on MSO6000 models and DSO6000 models which have the MSO upgrade license installed. 1 If you feel it’s necessary, turn off the power supply to the circuit under test. Turning off power to the circuit under test would only prevent damage that might occur if you accidentally short two lines together while connecting probes. You can leave the oscilloscope powered on because no voltage appears at the probes. Off 2 Connect the digital probe cable to the D15 - D0 connector on the rear panel of the mixed-signal oscilloscope. The digital probe cable is indexed so you can connect it only one way. You do not need to power-off the oscilloscope. Use only Agilent digital probe cable Use only the Agilent part number 54620-68701 digital probe kit supplied with the mixed-signal oscilloscope. CAUTION 3 Route the cable under the oscilloscope and bring it out in front. Lay the two sections of the digital cable on top of each other at the front of the oscilloscope. Slip the narrow end of the cable guide over the cable and into its slots at the front of 6000 Series Oscilloscope User’s Guide Viewing and Measuring Digital Signals the oscilloscope. Snap the wide end of the cable guide in place, being careful not to pinch the cable. 4 Connect the ground lead on each set of channels (each pod), using a probe grabber. The ground lead improves signal fidelity to the oscilloscope, ensuring accurate measurements. Circuit Ground Channel Pod Ground 5 Connect a grabber to one of the probe leads. (Other probe leads are omitted from the figure for clarity.) Grabber 6000 Series Oscilloscope User’s Guide Viewing and Measuring Digital Signals 6 Connect the grabber to a node in the circuit you want to test. 7 For high-speed signals, connect a ground lead to the probe lead, connect a grabber to the ground lead, and attach the grabber to ground in the circuit under test. Signal Lead Ground Lead Grabber 6000 Series Oscilloscope User’s Guide Ground Ground Viewing and Measuring Digital Signals 8 Repeat steps 3 through 6 until you have connected all points of interest. Signals Acquiring waveforms using the digital channels When you press Run/Stop or Single to run the oscilloscope, the oscilloscope examines the input voltage at each input probe. When the trigger conditions are met the oscilloscope triggers and displays the acquisition. For digital channels, each time the oscilloscope takes a sample it compares the input voltage to the logic threshold. If the voltage is above the threshold, the oscilloscope stores a 1 in sample memory; otherwise, it stores a 0. 6000 Series Oscilloscope User’s Guide Viewing and Measuring Digital Signals To display digital channels using AutoScale When signals are connected to the digital channels, AutoScale quickly configures and displays the digital channels. • To configure the instrument quickly, press the AutoScale key. Any digital channel with an active signal will be displayed. Any digital channels without active signals will be turned off. • To undo the effects of AutoScale, press the Undo AutoScale softkey before pressing any other key. This is useful if you have unintentionally pressed the AutoScale key or do not like the settings AutoScale has selected. This will return the oscilloscope to its previous settings. For information about how AutoScale works, see page 312. To set the instrument to the factory-default configuration...