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Quick Start Guide HP 83480A Digital Communications Analyzer HP 54750A Digitizing Oscilloscope...
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Hewlett-Packard Com- exclusive remedies. Hewlett- tions of the instrument pany will, at its option, either Packard shall not be liable for HP Part No. 83480-90021 power line switch. repair or replace products any direct, indirect, special, Printed in USA which prove to be defective.
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If you are already familiar with the information in this book, you can refer to the HP 83480A, HP 54750A User’s Guide, which shows you how to use the instrument to make many common measurements. It assumes you have already learned how to use the front panel of the instrument, by first reading this quick start guide.
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General Safety Considerations General Safety Considerations This product has been designed and tested in accordance with IEC Publica- tion 1010, Safety Requirements for Electronic Measuring Apparatus, and has been supplied in a safe condition. The instruction documentation contains information and warnings which must be followed by the user to ensure safe operation and to maintain the product in a safe condition.
Contents 1 Introducing the Instrument The HP 83480A, HP 54750A—At a Glance 1-2 A Quick Tour of the Front Panel 1-4 2 Operating the Instrument Operating the Instrument 2-2 Equipment Used in These Exercises 2-4 Exercise 1. Installing a Plug-in Module 2-5 Exercise 2.
NOTE The HP 83480A and HP 54750A mainframes do not accept plug-in modules designed for use with the HP 54710A and HP 54720A. The instrument also has software modularity by having a 3-1/2 inch disk drive and flash ROMs to allow for simple firmware upgrades of the firmware fea- tures.
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Introducing the Instrument The HP 83480A, HP 54750A—At a Glance What you’ll find in this chapter A Quick Tour of the Front Panel 1-4 Entry devices 1-4 Disk drive 1-4 CAL signal 1-4 Hardkeys 1-5 Display 1-5 Softkeys 1-6 Certification Hewlett-Packard Company certifies that this product met its published speci- fications at the time of shipment from the factory.
Introducing the Instrument A Quick Tour of the Front Panel A Quick Tour of the Front Panel This section describes how to use the front panel. This information will help you gain the full use of your instrument in the shortest possible time. This sec- tion divides the front panel into the following areas: •...
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Introducing the Instrument A Quick Tour of the Front Panel The two types of hardkeys are instant action and menu. Clear display and Run Hardkeys are examples of instant action keys because as soon as you press them, the instrument changes operating states. Time base and Trigger are examples of menu keys.
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Introducing the Instrument A Quick Tour of the Front Panel Figure 1-2. The instrument display Softkeys The softkeys are to the right of the display, and instead of placing a label on the softkey itself, the label is actually located on the display next to the soft- key.
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Introducing the Instrument A Quick Tour of the Front Panel The highlighted choice is the selection that is currently active. In Figure 1-3, triggered is highlighted, which indicates that the instrument is set to triggered sweep. Figure 1-3. Toggle softkey selection Menu softkeys A typical example of the menu softkeys is External Scale...
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Introducing the Instrument A Quick Tour of the Front Panel Figure 1-4. Menu softkey selection Continuous softkeys A typical example of the continuous softkeys is Level. It has a range of values that can be changed with the keypad, arrow keys, or knob. Figure 1-5.
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However, the Time base menu has at least two of this type of softkey, Bit Rate (HP 83480A only) and Scale and Position. In this case, only one of the softkeys is active at a time. To make the other softkey active, you must press the corresponding softkey.
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Introducing the Instrument A Quick Tour of the Front Panel You change selections by pressing the Hysteresis softkey, which brings up a sec- ond level softkey menu on the display. Then, you use the softkeys, arrow keys, or knob to change selections. To activate that selection, press the Enter softkey, then the display returns to the previous softkey menu.
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Operating the Instrument Operating the Instrument Operating the Instrument This chapter contains several exercises that will familiarize you with the oper- ation of the instrument. Exercises 1–3 show how to get the instrument up and running. Exercises 4 and 5 demonstrate the vertical, horizontal, and trigger menus by having you display a signal and then use the channel and time base menus to expand the signal.
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Operating the Instrument Operating the Instrument What you’ll find in this chapter Equipment Used in These Exercises 2-4 Exercise 1. Installing a Plug-in Module 2-5 Exercise 2. Turning On the Instrument 2-6 Exercise 3. Connecting a Signal 2-7 Exercise 4. Finding the Signal 2-8 Exercise 5.
All of the pictures of the display in this book were generated using an HP 83480A with an HP 83483A, 54751A electrical plug-in module, and the sig- nal from the HP 8133A pulse generator. If you are using a different plug-in module or signal source, your display and instrument settings may vary from the pictures in this book.
If the display is blank or if the message, Power-On Test Failed, appears at the top of the display, refer to Chapter 3, “In Case of Difficulty” or to the optional HP 83480A, HP 54750A Service Guide.
4 Connect the pulse signal to the electrical input (channel 1) on the HP 83483A, 54751A electrical plug-in module. 5 Display the Setup menu (on the HP 83480A, HP 54750A) and select the default setup by pressing: Setup, Default setup The default setup puts the instrument in a predefined operating condition.
Operating the Instrument Exercise 4. Finding the Signal Exercise 4. Finding the Signal The purpose of this exercise is to demonstrate the Autoscale function. The Autoscale function can be used to automatically set up the display for most input signals. To activate the Autoscale function, press Autoscale.
Operating the Instrument Exercise 5. Modifying the Setup Exercise 5. Modifying the Setup The purpose of this exercise is to show you the Channel and Time Base menus. Changing the vertical scale 1 To display the Channel menu and change the vertical scaling, press: Channel (located on the plug-in module), Scale Change the scaling so the vertical height of the signal is about eight divisions, using the knob, arrow keys or keypad.
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Exercise 5. Modifying the Setup Using the keypad When using the HP 83483A, 54751A electrical plug-in module, the knob or arrow key changes the scaling from 50 mV/div to 100 mV/div, in one step. At 50 mV/div the signal is clipped, and at 100 mV/div the signal is not expanded to take advantage of the full vertical size of the display.
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Operating the Instrument Exercise 5. Modifying the Setup Figure 2-2. Signal vertical display NOTE — HP 83480A only You can automatically adjust the vertical scale, instead of following the preceding proce- dure by pressing: Channel, Channel autoscale The amplitude scale is optimized for the input signal while the timebase settings are left alone.
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Operating the Instrument Exercise 5. Modifying the Setup Changing the time base 5 To display the Time Base menu and change the horizontal scale, press: Time base, Scale Use the knob, arrow keys or keypad to change the scaling so the horizontal width of the positive portion of the signal is about eight divisions.
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Operating the Instrument Exercise 5. Modifying the Setup Using the Position function 7 To horizontally center the signal on the display, press: Position The Position function moves the waveform horizontally on the display. (Posi- tion is sometimes referred to as delay.) The reference point is indicated by an arrow at the bottom of the display as shown in Figure 2-3.
1. After that, you will make the same measurements using the automatic measurement features. There are many additional features built into the instrument. Refer to the HP 83480A, HP 54750A User’s Guide for more information on making automatic measurements.
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Operating the Instrument Exercise 6. Making Measurements on the Signal Positioning the markers 4 To position the X1 marker, press: X1 Position Set the X1 marker to the left edge of the pulse. 5 To position the X2 marker, press: X2 Position Set the X2 marker to the right edge of the pulse.
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Operating the Instrument Exercise 6. Making Measurements on the Signal Notice the ∆X and ∆Y at the bottom of the display. The ∆X value is the width measurement, and the ∆Y value is the amplitude measurement. The markers allow you to make custom measurements on signals. Remember, they are not tied directly to the waveform data stored in memory, they are just positions on the display.
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Operating the Instrument Exercise 6. Making Measurements on the Signal The automatic measurement results are placed on the display where the verti- cal scale and offset values are normally displayed as shown in Figure 2-5. Figure 2-5. Signal automatic measurements Displaying the scale and offset values 10 To redisplay the vertical scale and offset values, press: Shift, Clr meas...
Operating the Instrument Exercise 7. Using the Help Menu Exercise 7. Using the Help Menu To display the Help menu, press Help. A screen similar to Figure 2-6 is dis- played. Figure 2-6. The instrument Help menu A three-column index appears on the display. The left column lists the fea- tures of the instrument, the middle column lists the front-panel key, and (if needed) the right column lists the softkey you press to find that feature.
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Personnel should be properly grounded, and should touch the frame of the instrument before touching any connector. Refer to the HP 83480A, HP 54750A User’s Guide for further information regarding ESD.
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In Case of Difficulty In Case of Difficulty What you’ll find in this chapter If the Mainframe Does Not Operate 3-4 If the Plug-in Does Not Operate 3-5...
5 Is the rear-panel line switch set to on? 6 Will the mainframe power up without the plug-in module installed? If the mainframe still does not power up, refer to the optional HP 83480A, HP 54750A Service Guide or return the mainframe to a qualified service department.
2 Perform the following procedures: • Make sure the instrument is ready to acquire data by pressing Run. • Verify the pulse output is connected to channel 1 on the HP 83483A, 54751A electrical plug-in module. • Verify the trigger output is connected to the trigger input.
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In Case of Difficulty If the Plug-in Does Not Operate • Make sure Channel Display is on by pressing: Channel, Display on off • Make sure the channel offset is adjusted so the waveform is not clipped off the display. •...
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Index Symbols equipment used for display, 2-4 expanding the signal, 2-9 +width key, 2-16 External Scale softkey, 1-7 amplitude, 2-8 finding input signals, 2-8 measurement, 2-15 Fine softkey, 1-9, 2-9 scale, 2-11 freerun softkey, 3-5 analog signal, 2-5 front panel, 1-4, 1-10 automatic measurement, 2-14, 2-16 Autoscale key, 2-8, 3-5 hardkey overview, 1-5...
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Index milli key, 2-10 mode softkey, 2-14 Time base key, 1-5 modifying the setup, 2-9 time base scale, 1-9 toggle softkeys, 1-6 trigger display, 2-8 offset, 2-17 level, 2-7 adjustment, 2-5 signal, 2-7 Offset softkey, 2-10 Trigger key, 1-5, 1-6, 3-5 optical/electrical plug-in module, 2-4 triggered softkey, 3-5 troubleshooting, 3-2–3-6...