.User Manual CFG280 11 MHz Function Generator 070-8559-03.Copyright Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. And foreign patents, issued and pending. Information in this publication supercedes that in all previously published material.

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2. Beckman Function Generator Fg2 Manual Woodworkers Machine
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Specifications and price change privileges reserved. Tektronix, Inc., P.O.

Box 1000, Wilsonville, OR.Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations. Optional Accessories. CFG280 User Manual.Table of Contents CFG280 User Manual.Do Not Operate Without Covers To avoid electric shock or fire hazard, do not operate this product with covers or panels removed. Use Proper Fuse To avoid fire hazard, use only the fuse type and rating specified for this product. CFG280 User Manual.If you suspect there is damage to this product, have it inspected by qualified service personnel.

Safety Terms and Symbols Terms in This Manual These terms may appear in this manual: WARNING. Warning statements identify conditions or practices that could result in injury or loss of life. CFG280 User Manual.Manual Certifications and Compliances CSA Certified Power Cords CSA Certification includes the products and power cords appropriate for use in the North America power network.

All other power cords supplied are approved for the country of use. CFG280 User Manual.General Safety Summary CFG280 User Manual.MHz. The front panel controls also provide selectable gate times (resolution) and selectable X10 attenuation. The CFG280 has a locking, multiposition handle that folds under the instrument.

The instrument comes with a power cord, an installed fuse for 115V operation, and this manual.Getting Started 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): Figure 1: Line Voltage Selectors, Power Input, and Fuse Locations CAUTION.Do not remove the ground lug from the power cord for any reason. Connect the input power cord. Use only the power cords specified for this equipment. Refer to Appendix C: Replaceable Parts on page 29 for power cord part numbers. CFG280 User Manual.Getting Started Front Panel Figure 2 shows the front-panel controls, connectors, and indicators of the CFG280 Function Generator. 10 11 Figure 2: Front Panel Controls, Connectors, and Indicators 1.

OVERRANGE LED. Lights if you apply a frequency above specified limits to the EXT COUNTER INPUT connector. It also lights if the gate time is too slow for the incoming signal.(see Table 1 on page 6). When you push either button in, the output frequency is 1/10 of the value shown on the FREQUENCY dial. When you push both buttons in, the output frequency is 1/19 of the value shown on the FREQUENCY dial. CFG280 User Manual.This button enables the SWEEP RATE and SWEEP WIDTH knobs. You can also feed an external sweep signal into the CFG280 Function Generator through a connector on the rear panel.

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See External Sweep on page 11 for further details.EXT COUNTER INPUT. When you push the button out the counter readout displays the frequency count of the signal being generated by the CFG280 Function Generator. Selects between two voltage ranges: 0 V.See page 13 for details. EXT AM INPUT BNC. This connector accepts external amplitude modulation signals.

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See page 12 for details. VCF INPUT BNC. This connector accepts external sweep signals. See page 11 for details. CFG280 User Manual.TTL Signals To generate a TTL signal, follow these steps: 1. Connect the SYNC OUT connector on the CFG280 Function Generator to the input BNC connector on an oscilloscope (see Figure 4). Test oscilloscope.Internal Sweep To use the internal sweep function, follow these steps: 1.

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Connect the MAIN OUT BNC on the CFG280 Function Generator to the device under test, such as a filter (see Figure 5). Connect the SWEEP OUT connector to one channel of an oscilloscope (see Figure 5).Use the SWEEP RATE knob to adjust the sweep rate. External Sweep To use the external sweep function, follow these steps: 1. Connect the MAIN OUT connector on the CFG280 Function Generator to the oscilloscope input connector (see Figure 6). To VCF INPUT.Reference 2.

Turn the Frequency Dial to the 0.1 position. To avoid damage to the CFG280, ensure that the maximum voltage into the rear panel VCF INPUT is no more than 10 V pk. Connect an external voltage signal to the VCF INPUT on the rear panel of the instrument (see Figure 6).This application requires another function generator (such as the Tektronix CFG253) to serve as a gating signal source and a ramp generator to serve as a VCF signal source. Connect the MAIN OUT connector on the CFG280 Function Generator to the oscilloscope input connector (see Figure 8).3.

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Connect the MAIN OUTPUT of the CFG253 to a BNC T connector. Connect the BNC T outputs to the GATE INPUT connector on the CFG280 Function Generator and the external input on the ramp generator (see Figure 8). Set the ramp generator to generate the desired ramp duration and polarity.7. Select the sweep frequency range by adjusting the FREQUENCY dial to one end of the swept range (upper or lower limit, depending on the polarity of the ramp) and adjusting the other end with the RG501 output amplitude. CFG280 User Manual.Reference CFG280 User Manual.Appendix A: Specifications Tables 2 through 5 show characteristics of the CFG280 Function Generator that are guaranteed by warranty. Table 2: Generator Specifications Characteristic Measurement Outputs Square wave, sine wave, triangle wave, TTL pulse, positive and negative ramp, pulse and.Internal Sweep Width Variable from 1:1 to 100:1 Amplitude Modulation 100% with, DC to 200 kHz DSB suppressed carrier modulation is also obtained by input modulating the signal with +2.5 VDC offset Input impedance = 3 k CFG280 User Manual.42 V peak Internal Time Base Crystal Frequency 10 MHz Temperature Stability.