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User Manual

CFG280
11 MHz Function Generator

070-8559-03

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Summary of Contents for CFG280

Page 1: ...User Manual CFG280 11 MHz Function Generator 070 8559 03...

Page 2: ...nd foreign patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Tektronix Inc P O Box 100...

Page 3: ...ny other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish servi...

Page 4: ......

Page 5: ...anel 8 Reference 9 TTL Signals 9 Internal Sweep 10 External Sweep 11 Amplitude Modulation 12 Tone Burst Generation and Stepped Frequency Multiplication 13 Appendix A Specifications 17 Appendix B Maint...

Page 6: ...Table of Contents ii CFG280 User Manual...

Page 7: ...nal that is outside the range specified for that terminal Ground the Product This product is grounded through the grounding conductor of the power cord To avoid electric shock the grounding conductor...

Page 8: ...ge Setting Before applying power ensure that the line selector is in the proper position for the power source being used Provide Proper Ventilation To prevent product overheating provide proper ventil...

Page 9: ...injury hazard not immediately accessible as you read the marking CAUTION indicates a hazard to property including the product Symbols on the Product The following symbols may appear on the product DAN...

Page 10: ...General Safety Summary vi CFG280 User Manual...

Page 11: ...ency Provisions are also made for amplitude modulation of the sine wave output from an external source An external gate input allows the generator to operate for the duration of an externally applied...

Page 12: ...the instrument set the line voltage selectors to the proper voltage setting and install the correct line voltage fuse before operating the equipment 1 Set the line voltage selectors to the input line...

Page 13: ...overload occurs Refer to Appendix C Replaceable Parts on page 29 for fuse part numbers WARNING To prevent electrical shock connect the power cord to a properly grounded power source The outside ground...

Page 14: ...te time is too slow for the incoming signal 2 GATE LED Lights when the frequency counter is making a measurement The LED will blink when the counter updates the display 3 Counter Readout This is a fiv...

Page 15: ...counter readout does not show frequency in hertz but period in seconds For example if the FREQUENCY dial is set at 4 the 1 multiplier LED is lighted and the SEC LED is lighted the counter readout dis...

Page 16: ...frequency sweep reiterates the rate at which the signal traverses the frequencies If you pull this button out the sweep will stop and you can adjust the sweep stop frequency with the SWEEP WIDTH knob...

Page 17: ...and therefore the polarity of the MAIN OUT signal This knob has no effect until you pull it out 18 SWEEP WIDTH Knob Adjusts the range of frequencies that are traversed by each sweep 19 SWEEP OUT BNC T...

Page 18: ...r damage to theCFG280 Function Generator be sure input equipment is properly grounded before connecting it to the function generator 1 GATE INPUT BNC This connector accepts external gate signals which...

Page 19: ...or tone bursts The square wave sync and sweep outputs can be used as a source for TTL logic or to synchronize an external device such as an oscilloscope The CFG280 Function Generator is also useful a...

Page 20: ...re not affected by this knob 5 Rotate the AMPLITUDE knob Notice that this knob has no effect on TTL signals The AMPLITUDE knob has no effect because the amplitude of a TTL signal is standardized for c...

Page 21: ...WEEP RATE knob out to lock the function generator at the sweep stop frequency the highest point on the sweep 8 Adjust the sweep stop frequency with the SWEEP WIDTH knob 9 Now push the SWEEP button in...

Page 22: ...the internal sweep function When using an external sweep signal the SWEEP WIDTH and SWEEP RATE knobs have no effect on the signal sweep Instead these parameters are controlled entirely by the externa...

Page 23: ...level of the external voltage source Tone Burst Generation and Stepped Frequency Multiplication You can use the CFG280 Function Generator as a tone burst generator or frequency multiplier for checkin...

Page 24: ...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 4 Set the ramp generat...

Page 25: ...F input Figure 9 Tone Burst and Stepped Frequency Typical Waveforms 7 Select the sweep frequency range by adjusting the FREQUENCY dial to one end of the swept range upper or lower limit depending on t...

Page 26: ...Reference 16 CFG280 User Manual...

Page 27: ...z to 11 MHz up down range switchable in eight decade steps Dial Range 1 to 11 calibrated 0 1 to 1 uncalibrated Dial Accuracy 5 of full scale from 0 1 Hz to 10 MHz 11 MHz setting not less than 11 MHz a...

Page 28: ...n Time 25 ns rise fall time at maximum output into a 50 load Square Wave Aberrations 4 peak to peak at maximum output into a 50 load Sync TTL Output Rise Fall Time 25 ns into 50 load VCF FM Input A 10...

Page 29: ...10 Hz 1 kHz Period mode 1 ms Accuracy Frequency mode 1 count time base error Period mode 1 count time base error trigger error External Input Sensitivity 1 Hz to 50 MHz 50 MHz to 100 MHz Impedance 1 M...

Page 30: ...ance was demonstrated to the following specifications as listed in the Official Journal of the European Communities EN 55011 Class A Radiated and Conducted Emissions EN 50081 1 Emissions EN 60555 2 AC...

Page 31: ...ndix A Specifications CFG280 User Manual 21 Table 6 Typical Mechanical Specifications Characteristic Measurement Dimensions H x W x D 100 mm X 240 mm X 230 mm 3 9 in x 9 5 in x 9 0 in Weight 3 0 kg 6...

Page 32: ...Appendix A Specifications 22 CFG280 User Manual...

Page 33: ...benzene toluene xylene acetone or similar solvents Do not use abrasive cleaners on any portion of the function generator Preparing for Shipment If the original packaging is unfit for use or not avail...

Page 34: ...roperly Before you assume a problem exists with theCFG280 Function Generator check all other test equipment Yes Are any LEDs lighted Is power cord firmly connected to both instrument and power source...

Page 35: ...gital display frozen Are function gate and attenuation settings appropriate for the input signal Send your instrument to the nearest Tektronix service center Change settings to accommodate the input s...

Page 36: ...and MAIN button Does oscilloscope have good connection to output jack Yes Yes Are amplitude settings too low to produce visible signal No No Are range and function selected No Yes Send your instrument...

Page 37: ...Is signal responsive to sweep rate and sweep width adjustments No Are you using internal or external sweep Internal External Is signal responsive to DC offset adjustments No Yes Is SWEEP button pushed...

Page 38: ...Appendix B Maintenance 28 CFG280 User Manual...

Page 39: ...ktronix Part Number Fuse 3AG 0 6 A 250 V SB 90 132 V operation 159 0043 00 CFG280 User Manual 070 8559 XX 115 V Power Cord Refer to Table 9 Optional Accessories The following items are available as op...

Page 40: ...are available Table 9 Accessory Power Cords Plug Configuration Normal Usage Tektronix Part Number North America 115 V 161 0104 00 Europe 230 V 161 0104 06 United Kingdom 230 V 161 0104 07 Australia 23...

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