Instruction/ maintenance manual of the product CFG280 Tektronix
Go to page of 40
User Manual CFG280 1 1 MHz Function Generator 070-8559-03.
Copyright T ektronix, Inc. 1991. All rights reserved. T ektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved.
W ARRANTY T ektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1) year from the date of shipment.
.
CFG280 User Manual i T able of Contents General Safety Summary iii . . . . . . . . . . . . . . . . . . . . . . . . . . . . Getting Started 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Preparing the Function Generator for Use 2 .
T able of Contents ii CFG280 User Manual.
CFG280 User Manual iii General Safety Summary Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. Injury Precautions Use Proper Power Cord T o avoid fire hazard, use only the power cord specified for this product.
General Safety Summary iv CFG280 User Manual Do Not Operate in Wet/Damp Conditions T o avoid electric shock, do not operate this product in wet or damp conditions. Do Not Operate in Explosive Atmosphere T o avoid injury or fire hazard, do not operate this product in an explosive atmosphere.
General Safety Summary CFG280 User Manual v CAUTION. Caution statements identify conditions or practices that could r esult in damage to this pr oduct or other pr operty . T erms on the Product These terms may appear on the product: DANGER indicates an injury hazard immediately accessible as you read the marking.
General Safety Summary vi CFG280 User Manual.
CFG280 User Manual 1 Getting Started The T ektronix CFG280 Function Generator produces low distortion sine waves, square waves, triangle waves, TTL sync signals, positive and negative pulses, and ramp waveforms in a frequency range of 0.1 Hz to 1 1 MHz.
Getting Started 2 CFG280 User Manual Preparing the Function Generator for Use Check the following items prior to operating the CFG280 Function Generator for the first time (see Figure 1 for locations of items 1 through 3): 1 2 3 Figure 1: Line V oltage Selectors, Power Input, and Fuse Locations CAUTION.
Getting Started CFG280 User Manual 3 W ARNING. T o prevent electrical shock, unplug the power cor d and disconnect the signal cable fr om any signal sour ce befor e checking or r eplacing the fuse. 2. Check that the correct line fuse is installed. The line fuse provides protection if the equipment malfunctions or an overload occurs.
Getting Started 4 CFG280 User Manual Front Panel Figure 2 shows the front-panel controls, connectors, and indicators of the CFG280 Function Generator . 3 1 2 45 6 7 89 18 20 22 21 23 19 17 16 15 14 13 12 10 1 1 24 25 Figure 2: Front Panel Controls, Connectors, and Indicators 1.
Getting Started CFG280 User Manual 5 The 1 and 0.1 LEDs provide accurate indication for the two lowest frequency ranges. For example, if the FREQUENCY dial is set on 2.6 and the 1 LED is lighted, the function generator output frequency is 2.6 Hz. 5. FREQUENCY Range LEDs.
Getting Started 6 CFG280 User Manual T able 1 : Eff e ct of Symm e t r y Buttons on Output W ave fo r m L e ft Symm e t r y Button Ri ght Symm e t r y Button 10. SWEEP Button. Activates the internal sweep generator , which produces a signal that traverses a range of frequencies.
Getting Started CFG280 User Manual 7 14. SOURCE Button. Selects between internal and external counter input. When you push the button in, the counter readout displays the signal frequency count from the EXT COUNTER INPUT .
Getting Started 8 CFG280 User Manual Rear Panel In addition to the line voltage switches, fuse, and power cord receptacle, the items shown in Figure 3 are located on the rear panel.
CFG280 User Manual 9 Reference This section describes several advanced functions of the CFG280 Function Generator . The variety of swept and modulated signals available from the function generator make it especially useful for such applications as testing servo-system or amplifier response, distortion, and stability .
Reference 10 CFG280 User Manual 3. Change the FREQUENCY range and rotate the FREQUENCY dial. Observe how the frequency of the TTL signal changes. 4. Rotate the DC OFFSET knob. Notice that this knob has no effect on TTL signals. The DC OFFSET knob has no effect because the DC of fset of a TTL signal is standardized for compliance with TTL logic.
Reference CFG280 User Manual 11 3. Connect another channel of the oscilloscope to the device under test (see Figure 5). 4. Push the SWEEP button out on the function generator to deactivate the internal sweep function. 5. T urn the FREQUENCY dial to the desired sweep start frequency (the lowest point on the sweep).
Reference 12 CFG280 User Manual 2. T urn the Frequency Dial to the 0.1 position. CAUTION. T o avoid damage to the CFG280, ensur e that the maximum voltage into the r ear panel VCF INPUT is no mor e than ± 10 V pk. 3. Connect an external voltage signal to the VCF INPUT on the rear panel of the instrument (see Figure 6).
Reference CFG280 User Manual 13 2. Push the sine wave FUNCTION button. 3. Set the FREQUENCY dial to the desired carrier frequency . CAUTION. T o avoid damage to theCFG280 Function Generator , ensur e that the maximum voltage into the r ear panel VCF INPUT is no mor e than 5 V p-p .
Reference 14 CFG280 User Manual T est oscilloscope Ramp Generator CFG280 MAIN OUT CFG253 T o GA TE INPUT (on rear panel) T o VCF INPUT (on rear panel) EXT IN RAMP OUT Figure 8: T one-Burst and Stepped Frequency Multiplication T est Setup 3. Connect the MAIN OUTPUT of the CFG253 to a BNC T connector .
Reference CFG280 User Manual 15 T one-Burst or stepped frequency output GA TE input VCF input Figure 9: T one-Burst and Stepped Frequency T ypical Waveforms 7.
Reference 16 CFG280 User Manual.
CFG280 User Manual 17 Appendix A: Specifications T ables 2 through 5 show characteristics of the CFG280 Function Generator that are guaranteed by warranty .
Appendix A: Specifications 18 CFG280 User Manual T able 2: Generator Specifications (Cont.) Characteristic Measurement Am p lit ud e Flat n ess (At 10 kHz, 50 Load) Withi n ± 0 . 5 d B , 0 .1 H z to 11 0 k H z Within ± 1.5 dB, to 1.1 MHz Within ± 2.
Appendix A: Specifications CFG280 User Manual 19 T able 3: Counter Specifications Characteristic Measurement I npu t Sele c tio n I n te rn al a nd e x te rn al i npu t sele c ta b le F r e qu e ncy R.
Appendix A: Specifications 20 CFG280 User Manual T able 4: General Specifications Characteristic Measurement Line V oltage Range Selectable ranges at 50 Hz to 60 Hz 90 V AC to 1 10 V AC 108 V AC to 13.
Appendix A: Specifications CFG280 User Manual 21 T able 6: T ypical Mechanical Specifications Characteristic Measurement Dimensions (H x W x D) 100 mm X 240 mm X 230 mm (3.
Appendix A: Specifications 22 CFG280 User Manual.
CFG280 User Manual 23 Appendix B: Maintenance This appendix provides information for the basic maintenance of the CFG280 Function Generator . Cleaning T o clean the CFG280 Function Generator , use a soft cloth dampened in a solution of mild detergent and water .
Appendix B: Maintenance 24 CFG280 User Manual T roubleshooting Use the following diagrams to identify basic problems with your instrument setup. The diagrams do not provide instructions for or recommend instrument disassembly . If these diagrams fail to solve your problem, send your instrument to the nearest T ektronix service center .
Appendix B: Maintenance CFG280 User Manual 25 T oggle the SOURCE button. Inappropriate Counter Reading Start. Is the digital display frozen? Are function, gate, and attenuation settings appropriate for the input signal? Send your instrument to the nearest T ektronix service center .
Appendix B: Maintenance 26 CFG280 User Manual Push appropriate MUL TIPLIER and FUNCTION buttons. Go to Digital Display Blank on page 24. Adjust with AMPLITUDE knob and MAIN button.
Appendix B: Maintenance CFG280 User Manual 27 Ye s Send your instrument to the nearest T ektronix service center . Adjust with AMPLITUDE knob and MAIN button. Is signal amplitude too large or too small? Ye s No No Ye s Start. Is signal frequency too fast or slow? Adjust with MUL TIPLIER buttons and FREQUENCY dial.
Appendix B: Maintenance 28 CFG280 User Manual.
CFG280 User Manual 29 Appendix C: Replaceable Parts Replaceable parts may be ordered directly from your authorized T ektronix dealer . Standard Accessories The following items are shipped with the CFG280 Function Generator: T able 7: Standard Accessories Accessory T ektronix Part Number Fuse, 3AG, 0.
Appendix C: Replaceable Parts 30 CFG280 User Manual The following power cords are available. T able 9: Accessory Power Cords Plug Configuration Normal Usage T ektronix Part Number North America 1 15 V.
An important point after buying a device Tektronix CFG280 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Tektronix CFG280 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Tektronix CFG280 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Tektronix CFG280 you will learn all the available features of the product, as well as information on its operation. The information that you get Tektronix CFG280 will certainly help you make a decision on the purchase.
If you already are a holder of Tektronix CFG280, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Tektronix CFG280.
However, one of the most important roles played by the user manual is to help in solving problems with Tektronix CFG280. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Tektronix CFG280 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
