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2-2

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.

Exercise 6

shows you how to use the markers and automatic
measurement features to make a pulse width and voltage
amplitude measurement.

Exercise 7

introduces you to the Help menu.

You will find it easier to perform these exercises if you are at least a little
familiar with how to use the front panel. The best way to learn how to use the
front panel is to read

Chapter 1, “Introducing the Instrument”

.

Note

Clean the cabinet using a damp cloth only.

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Содержание 54750A

Страница 1: ...Agilent 83480A Digital Communications Analyzer Agilent 54750A Digitizing Oscilloscope Quick Start Guide Advanced Test Equipment Rentals www atecorp com 800 404 ATEC 2832 Established 1981 ...

Страница 2: ... defects resulting from improper or inadequate maintenance by Buyer Buyer supplied software or interfac ing unauthorized modifica tion or misuse operation outside of the environmental specifications for the product or improper site preparation or maintenance No other warranty is expressed or implied Agilent Technologies specifically dis claims the implied warranties of merchantability and fitness ...

Страница 3: ...ainframe or plug in module to perform properly To best meet your learning needs you can use this book in one of two ways 1 Read A Quick Tour of the Front Panel on page 1 4 before performing the exercises 2 Go straight to the exercises This method is for users who prefer to learn how to use the front panel by experimenting with the front panel controls If you are already familiar with the informati...

Страница 4: ...ondition in which all means for protection are intact only WAR N I N G To prevent electrical shock disconnect the Agilent Product variable from mains before cleaning Use a dry cloth or one slightly dampened with water to clean the external case parts Do not attempt to clean internally WAR N I N G This is a Safety Class 1 product provided with a protective earthing ground incorporated in the power ...

Страница 5: ...binet If the total power dissipated in the cabinet is greater than 800 watts then forced convection must be used C AUT IO N Always use the three prong ac power cord supplied with this instrument Failure to ensure adequate earth grounding by not using this cord may cause instrument damage C AUT IO N Do not connect ac power until you have verified the line voltage is correct Damage to the equipment ...

Страница 6: ......

Страница 7: ...pment Used in These Exercises 2 3 Exercise 1 Installing a Plug in Module 2 4 Exercise 2 Turning On the Instrument 2 5 Exercise 3 Connecting a Signal 2 6 Exercise 4 Finding the Signal 2 7 Exercise 5 Modifying the Setup 2 8 Exercise 6 Making Measurements on the Signal 2 13 Exercise 7 Using the Help Menu 2 17 3 In Case of Difficulty In Case of Difficulty 3 2 If the Mainframe Does Not Operate 3 3 If t...

Страница 8: ......

Страница 9: ...1 Entry devices 1 4 Disk drive 1 4 CAL signal 1 4 Hardkeys 1 5 Display 1 5 Softkeys 1 6 Introducing the Instrument ...

Страница 10: ...d extinction ratio and q factor measurements The ability to set the timebase display to bit period select the appropriate telecom bit rate and enter the number of bits to be displayed If you wish to add these capabilities to an Agilent 54750A series digitizing oscilloscope or use the Agilent 83485A optical plug in module a firmware upgrade must first be installed Order the Agilent 83480K communica...

Страница 11: ...pecifica tions at the time of shipment from the factory Agilent Technologies further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology to the extent allowed by the Institute s calibration facility and to the calibration facilities of other Interna tional Standards Organization members ...

Страница 12: ...o vides continuous control while the arrow keys are step controls The keypad allows you to enter specific values Disk drive The disk drive is a 3 1 2 inch high density MS DOS compatible drive You can use the disk drive for loading applications storing and loading waveforms storing and loading instrument setups printing waveforms to a file or loading new system firmware MS DOS is a registered trade...

Страница 13: ...eys because as soon as you press them the instrument changes operating states Time base and Trigger are examples of menu keys Pressing them causes softkey menus to come up on the right side of the display Figure 1 1 The front panel of the instrument Display Figure 1 2 shows the main areas of the display and how you can interpret some of the instrument s settings from the display ...

Страница 14: ...menu There are five types of softkeys and there are some differences on how each type of softkey operates The five types of softkeys are toggle menu continu ous list and single choice Because the Trigger menu contains all five types of softkeys it is used over the next few pages to demonstrate the differences among the softkeys When you press the Trigger key the Trigger softkey menu comes up on th...

Страница 15: ...sweep Figure 1 3 Toggle softkey selection Menu softkeys A typical example of the menu softkeys is External Scale refer to Figure 1 3 on page 1 7 The ellipses after the word scale indicate that when you press this softkey a new softkey menu comes up on the display that allows you to make several additional choices refer to Figure 1 4 To exit this menu sim ply press the Done softkey The display retu...

Страница 16: ...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 Continuous softkey selection ...

Страница 17: ... channel scale the knob and arrow keys operate in two modes One mode is a 1 2 5 sequence while the other mode is a fine mode that allows you to make smaller incremental changes You activate the fine mode by pressing Shift on the keypad followed by pressing the arrow key with the word Fine written in blue above that key When the fine mode is active you will see the word Fine at the top right corner...

Страница 18: ...e that selection press the Enter softkey then the display returns to the previous softkey menu If you press the Cancel softkey the instrument returns to the previous selection Single choice softkeys A typical example of the single choice softkeys is Enter There are several varia tions of this type of softkey throughout the many softkey menus When you press the softkey the instrument executes that ...

Страница 19: ... in Module 2 4 Exercise 2 Turning On the Instrument 2 5 Exercise 3 Connecting a Signal 2 6 Exercise 4 Finding the Signal 2 7 Exercise 5 Modifying the Setup 2 8 Exercise 6 Making Measurements on the Signal 2 13 Exercise 7 Using the Help Menu 2 17 Operating the Instrument ...

Страница 20: ...ou display a signal and then use the channel and time base menus to expand the signal Exercise 6 shows you how to use the markers and automatic measurement features to make a pulse width and voltage amplitude measurement Exercise 7 introduces you to the Help menu You will find it easier to perform these exercises if you are at least a little familiar with how to use the front panel The best way to...

Страница 21: ...51A electrical plug in module and the signal from the Agilent 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 With the Agilent 83480A the Agilent 83485A optical electrical plug in module could also have been used In this case we would connect the signal to the electrical input of the Agi...

Страница 22: ...n it off before you install or remove a plug in module After a plug in module is installed the mainframe identifies the plug in module and the slot in which it is installed 2 Finger tighten the knurled screw at the bottom of the plug in module The RF connectors on the rear panel of the plug in module are spring loaded Finger tighten the knurled screw to ensure there is a good ground connection bet...

Страница 23: ...ainframe is set to the 115 VAC mode use the supplied power cord If you use an alternate power cord that cannot handle the power requirements of the instrument the power cord may become warm or the instrument may not operate 4 Set the front panel power switch to ON After a few seconds you will see a graticule on the display and a softkey menu on the right side of the display If the display is blank...

Страница 24: ... not exceed 2 Vp p Pulse level 500 mV do not exceed 2 Vp p Pulse frequency 50MHz C AUT IO N Cables can build up high voltage levels that can discharge into the channel or trigger inputs and cause damage Cables should be discharged using a short or a 50Ω terminator prior to connection 2 Make sure the trigger and pulse signals are enabled 3 Connect the trigger to the trigger input channel 2 on the A...

Страница 25: ...ale function is enabled the instrument quickly analyzes the signal and sets up the vertical horizontal and trigger to optimize the display of the signal Autoscale can find repetitive signals with a frequency greater than or equal to 50 Hz a duty cycle greater than 1 an amplitude greater than 50 mV p p Figure 2 1 Signal displayed using the Autoscale function If you unintentionally press the Autosca...

Страница 26: ...ange the scaling so the vertical height of the signal is about eight divisions using the knob arrow keys or keypad Selecting Fine mode When the knob and arrow keys are not in the Fine mode they change the scal ing in a 1 2 5 sequence You can change the scaling in 1 mV increments by using the keypad or by setting the knob and arrow keys to the Fine mode 2 To set the instrument to the Fine mode pres...

Страница 27: ...not need to press the Enter key You only press the Enter key if you are entering numbers that do not require a unit of measure or that are in volts or seconds Depend ing on the value you enter with the keypad the instrument may round the value up or down For example if you try to enter 75 75 mV div the instru ment will automatically round the entry to 75 8 mV div Setting the offset Offset is simil...

Страница 28: ...cale 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 Note Agilent 83480A only You can automatically adjust the vertical scale instead of following the preceding pro cedure by pressing Channel Channel autoscale The amplitude scale is optimized for the input signal while the timebase settings are left alon...

Страница 29: ...e knob and arrow keys adjust in smaller increments or you can use the keypad to enter a smaller value like 1 4 ns div 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 a...

Страница 30: ...2 12 Operating the Instrument Exercise 5 Modifying the Setup Setting the reference 8 To set the reference to the left or center of the graticule area press Reference ...

Страница 31: ...strument Refer to the Agilent 83480A 54750A User s Guide for more information on making automatic measurements Selecting the manual marker mode 1 To select the manual marker mode press Marker mode manual Enter Change the mode selection by using the knob arrow keys or softkeys Setting the X Y source In the manual marker mode there are two X markers and two Y markers You can position the X markers h...

Страница 32: ...ft edge of the pulse 5 To position the X2 marker press X2 Position Set the X2 marker to the right edge of the pulse 6 To position the Y1 marker press Y1 Position Set the Y1 marker to the bottom of the pulse 7 To position the Y2 marker press Y2 Position Set the Y2 marker to the top of the pulse The display will be similar to Figure 2 4 Figure 2 4 Signal custom measurements ...

Страница 33: ...tomatic amplitude measurement 9 To make an automatic amplitude measurement on channel 1 press Shift V amptd channel 1 Enter The IEEE pulse parameter standards are used for all of the automatic measure ments unless changes are made in the define measurement menu Automatic measurements are preferred because they are faster and more repeatable than manual marker measurements Automatic measurements us...

Страница 34: ...nts on the Signal 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 The automatic measurement results are replaced by the vertical scale and off set values ...

Страница 35: ...ure 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 You can use either the knob or arrow keys to scroll through the Help menu ...

Страница 36: ......

Страница 37: ...3 If the Mainframe Does Not Operate 3 3 If the Plug in Does Not Operate 3 4 In Case of Difficulty ...

Страница 38: ...rforming some simple checks before calling Agilent Technol ogies or returning the unit for service may save waiting for your instrument to be repaired C AUT IO N Electrostatic discharge ESD on or near input connectors can damage circuits inside the instrument Repair of damage due to misuse is not covered under warranty Before connecting any cable to the electrical input momentarily short the cente...

Страница 39: ...to the proper ac power source 4 Is the mainframe turned on 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 Agilent 83480A 54750A Service Guide or return the mainframe to a quali fied service department Refer to the Agilent 83480A 54750A User s Guide for a complete listing of ...

Страница 40: ...ed Are the connectors clean Refer to the Agilent 83480A 54750A User s Guide for more information about cleaning the connectors Does the plug in module work in the other two slots 1 2 or 3 4 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 Agilent 83483A 54751A electrical plug in module Veri...

Страница 41: ...modules is listed near the bottom of the display in the box labeled Plug ins If the model number of the plug in module is listed next to the appropriate slot number then the mainframe has identified the plug in If known is displayed instead of the model number of the plug in module remove and reinsert the plug in module in the same slot If known is still displayed then the memory contents of the p...

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Страница 43: ...tkey 2 6 description of the instrument 1 1 disk drive overview 1 4 display messages 3 2 overview 1 5 Display softkey 3 5 Done softkey 1 7 duty cycle 2 7 E electrical plug in module 2 3 2 8 Enter softkey 1 9 1 10 2 13 entry device overview 1 4 equipment used for display 2 3 expanding the signal 2 8 External Scale softkey 1 7 F finding input signals 2 7 Fine softkey 1 9 2 8 freerun softkey 3 4 front...

Страница 44: ...4 S safety iiv laser classification iiv scale increments 2 8 Scale softkey 1 8 2 8 2 10 Setup key 2 6 setup modification 2 8 Shift key 1 9 signal connection 2 6 markers 2 8 measurement 2 13 single choice softkeys 1 10 softkey overview 1 6 square wave signal 2 6 Sweep softkey 1 6 3 4 System configuration softkey 3 5 T Time base key 1 5 time base scale 1 9 toggle softkeys 1 6 trigger display 2 7 lev...

Страница 45: ...Index 3 Index X1 X2 Position softkeys 2 14 X2 Y2 Source softkey 2 13 Y Y1 Y2 Position softkeys 2 14 ...

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