Tektronix CFG280 User Manual
User Manual
CFG280
11 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.
T ektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX and TEK are registered trademarks of T ektronix, Inc.
WARRANTY
Tektronix 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. If any such product
proves defective during this warranty period, Tektronix, at its option, either will repair the
defective product without charge for parts and labor, or will provide a replacement in
exchange for the defective product.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect
before the expiration of the warranty period and make suitable arrangements for the
performance of service. Customer shall be responsible for packaging and shipping the
defective product to the service center designated by 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.
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
service under this warranty a) to repair damage resulting from attempts by personnel other
than Tektronix representatives to install, repair or service the product; b) to repair damage
resulting from improper use or connection to incompatible equipment; or c) to service a
product that has been modified or integrated with other products when the effect of such
modification or integration increases the time or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS
PRODUCT IN LIEU OF ANY OTHER WARRANTIES, EXPRESSED OR
IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE. TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE
DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY
PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY.
TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY
INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS
ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
Table of Contents
General Safety Summary iii. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preparing the Function Generator for Use 2. . . . . . . . . . . . . . . . .
Front Panel 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Panel 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reference 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TTL Signals 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Internal Sweep 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Sweep 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Amplitude Modulation 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T one-Burst Generation and
Stepped Frequency Multiplication 13. . . . . . . . . . . . . . . . . . . .
Appendix A: Specifications 17. . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix B: Maintenance 23. . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preparing for Shipment 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix C: Replaceable Parts 29. . . . . . . . . . . . . . . . . . . . . . .
Standard Accessories 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional Accessories 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CFG280 User Manual
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T able of Contents
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CFG280 User Manual
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.
Avoid Electric Overload
T o avoid electric shock or fire hazard, do not apply a voltage to a
terminal that is outside the range specified for that terminal.
Ground the Product
This product is grounded through the grounding conductor of the
power cord. T o avoid electric shock, the grounding conductor must
be connected to earth ground. Before making connections to the
input or output terminals of the product, ensure that the product is
properly grounded.
Do Not Operate Without Covers
T o avoid electric shock or fire hazard, do not operate this product
with covers or panels removed.
Use Proper Fuse
T o avoid fire hazard, use only the fuse type and rating specified for
this product.
CFG280 User Manual
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General Safety Summary
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.
Product Damage Precautions
Use Proper V oltage Setting
Before applying power, ensure that the line selector is in the proper
position for the power source being used.
Provide Proper Ventilation
T o prevent product overheating, provide proper ventilation.
Do Not Operate With Suspected Failures
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.
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CFG280 User Manual
General Safety Summary
CAUTION. Caution statements identify conditions or practices that
could result in damage to this product or other property.
Terms on the Product
These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you
read the marking.
WARNING indicates an 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:
DANGER
High Voltage
Protective Ground
(Earth) T erminal
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
ATTENTION
Refer to
Manual
Double
Insulated
v
General Safety Summary
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CFG280 User Manual
Getting Started
The Tektronix 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 11 MHz. You can also directly control amplitude and
DC offset.
The sweep function makes the output signal traverse a range of
frequencies. The START and ST OP FREQ control settings determine
the sweep rate and sweep width internally or the sweep function can
be input from an external DC signal.
A voltage-controlled frequency (VCF) input controls the output
frequency from an external voltage source. The output frequency can
be swept above or below the selected frequency to a maximum of
100:1, depending on the polarity and amplitude of the VCF input and
the selected output frequency. 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 gating signal. This mode provides
either a single cycle output or a train of preselected waveforms,
depending on the gating signal width and the function generator
frequency setting.
The CFG280 Function Generator has a frequency counter to count
the signal frequency of sine, square and triangle waves from 1 Hz to
100 MHz. The frequency counter features one five-digit display with
automatic decimal point placement and LED indicators that show the
display measurement unit and mode. It can measure periods in
seconds or frequencies in kHz or 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.
CFG280 User Manual
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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):
2
1
3
Figure 1: Line Voltage Selectors, Power Input, and Fuse Locations
CAUTION. To prevent damage to 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 voltage. These
selectors connect internal wiring for various line voltages. This
product is intended to operate from a power source that does not
supply more than 250 V
between either supply conductor and ground. For line voltage
ranges, refer to Appendix A: Specifications on page 17.
2
between the supply conductors or
RMS
CFG280 User Manual
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