EZ Digital FG-7002C Operation Manual
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EZ Digital FG-7002C Operation Manual

Sweep function generator
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1.888.610.7664
FG-7002C / 5C
2MHz / 5MHz
Sweep Function Generator
Operation Manual
www.calcert.com
15
10
20
5
25
0
30
sales@calcert.com

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Summary of Contents for EZ Digital FG-7002C

  • Page 1 FG-7002C / 5C 2MHz / 5MHz Sweep Function Generator Operation Manual 1.888.610.7664 www.calcert.com sales@calcert.com...
  • Page 2 WARRANTY Warranty service covers a period of one year from the date of original purchase. In case of technical failure within one year, our service center or sales outlet free of charge will provide repair service. We charge customers for repair after the one-year warranty period has been expired.
  • Page 3 Introduction Thank you for purchasing our product, electronic measuring instruments produced by us are high technology products made under strict quality control. We guarantee their exceptional precision and utmost reliability. For proper use of the product, please read this operation manual carefully. Note 1.
  • Page 4 Safety Symbols Protective earth (ground) To identify any terminal which is intended for connection to an external conductor for protection against electric shock In case of a fault, or the terminal of a protective earth (ground) electrode. Functional earth terminal on the rear panel. “IN”...

  • Page 5: Table Of Contents

    CONTENTS 1. PRODUCT DESCRIPTION 1-1. Introduction ----------------------------------------------------------------- ( 1-2. Technical Specifications ------------------------------------------------- ( 1-3. Equipment Ratings -------------------------------------------------------- ( 1-4. Supplied Accessories ---------------------------------------------------- ( 2. INSTALLATION 2-1. Initial Inspection ----------------------------------------------------------- ( 2-2. Connecting Ac Power ---------------------------------------------------- ( 2-3. Cooling And Ventilation -------------------------------------------------- ( 2-4.

  • Page 6: Product Description

    VCF(voltage controlled frequency) produces precision sine, square and triangle waves over the 0.02 Hz to 2 MHz; FG-7002C, 0.05Hz - 5MHz; FG-7005C for sub- audible, audio, ultrasonic and RF applications. A continuously variable DC offset allows the output to be injected directly into circuits at the correct bias level.
  • Page 7 : Approx. 1K FREQUENCY COUNTER CHARACTERISTICS Display FG-7002C: 6 digit green LED, Gate time, MHz, KHz, Hz, mHz. FG-7005C : 7 digit green LED, Gate time, MHz, KHz, Hz, mHz. Frequency Range FG-7002C: 200 mHz to 50 MHz With Auto Range.

  • Page 8: Equipment Ratings

    Fuse Power Max. 115VAC +/-10%, 50/60Hz F 0.5A 250V F 0.2A 250V (FG-7002C) 230VAC +/-10% , 50/60Hz F 0.25A 250V (FG-7005C) NOTE: AC Power is preset to 115V or 230V in factory according to the request of customer. AC Power can be selected inside of unit.

  • Page 9: Installation

    2. INSTALLATION 2-1. Initial Inspection This instrument was carefully inspected both mechanically and electrically before shipment. It should be physically free of damage. To confirm this, the instrument should be inspected for physical damage in transit. Also, check for supplied accessories are present and correct.

  • Page 10: Operation

    3. OPERATION 3-1. Controls, indicators and connectors 15 19 FIG 1-1. FRONT PANEL OPERATOR’S CONTROLS(FG-7002C) FIG 1-2. FRONT PANEL OPERATOR’S CONTROLS(FG-7005C,) 1.888.610.7664 www.calcert.com sales@calcert.com...
  • Page 11 LED DISPLAY. Displays Internal or External Frequency. INTERNAL/EXTERNAL SWITCH. PUSH IN : External Frequency Counter. PUSH OUT: Internal Frequency Counter. RANGE SWITCHES. Frequency Range Selector. FUNCTION SWITCHES. Select Sine wave, Triangle Wave Or Square Wave Output. ATTENUATOR. Selects Output Level By -20 dB. GATE TIME INDICATOR.
  • Page 12 LOW PASS FILTER VOLTAGE FUSE POWER MAX 115V ~ 0.5A F 230V ~ 0.2A F S/N : Made in Korea FIG 2-1. REAR PANEL(FG-7002C) VOLTAGE FUSE POWER MAX 115V ~ 0.5A F 230V ~ 0.2A F S/N : FIG 2-2. REAR PANEL(FG-7005C)

  • Page 13: Operating Instruction

    3-2. Operating instruction This instrument is capable of generating a wide variety of waveforms and counting an external frequency with high resolution of 6 digits LED for FG-7002C (7digits LED for FG-7005C). The most benefit and satisfaction can be gained from the instrument by fully understanding its capabilities and versatility and becoming familiar with operation procedure.
  • Page 14 G. Connect a cable from the 50 BNC to the point where it is desired to inject the signal. H. Adjust the 50 output to the desired amplitude with the AMPLITUDE control. TTL Pulse 0V Triangle 0V Sine Square FIG. 3 OUTPUT WAVEFORMS AND PHASE RELATIONSHIPS I.
  • Page 15 C. It is easier to accurately set the FREQ. dial if settings between 0.1 and 2.0(FG-7002C), 5.0(FG-7005C), are used. Since the dial rotation overlaps ranges, it is not usually necessary to use readings below 1. Just change to a lower range and use a higher dial setting.

  • Page 16: Use As Pulse Generator

    When the generator output is connected to a coaxial connector on the equipment under test, it usually moderate to high impedance. A reasonably constant terminating impedance may be maintained while injecting signal into moderate and high impedance circuits(500 and up)by adding a coaxial tee in the output cable and connecting a 50 termination to one leg.
  • Page 17 Adjust Period Of Shorter Duration With Freq. Controls Pulse (Square) Ramp (Triangle) Skewed (Sine) Adjust Period Of Longer Duration With SYNC Symmetry Controls FIG 5. PULSE, RAMP, AND SKEWED SINE WAVE GENERATION C. If both a specific pulse width and repetition rate (specific rise time and fall time for ramp wave), :are required, The waveform may be obtained as follows: a.

  • Page 18: Ttl/Cmos Output

    DESIRED FREQUENCY = DESIRED PULSE WIDTH x 2 3-5-1. TTL/CMOS OUTPUT(FG-7002C only) TTL/CMOS output is specifically designed for compatibility with TTL/CMOS digital logic circuits. Set-up time is considerably reduced because the fixed logic levels and polarity are ready for direct injection into TTL/CMOS circuits. there is a need for protection from accidental Application of too high amplitude or incorrect DC offset which might damage semiconductors.

  • Page 19: Ttl/Sync Output

    A. Using the square wave generator or pulse generator modes, clock pulses can be generated for testing, troubleshooting or circuit analysis. The instrument could even be used as a substitute master clock generator as TTL/CMOS circuits can be driven from the TTL/CMOS BNC. B.
  • Page 20 300k Frequency deviation versus VCF IN voltage for each model. B. For an example(FG-7002C), it is assumed that we wish to generate a 455 KHz signal with FM deviation of ±15 KHz (30 KHz swing). 1M range will be used to obtain the 455 KHz carrier with the FREQ. dial set to 0.455. The highest frequency obtainable on the 1M range is 2 MHz.

  • Page 21: External Control Of Vcf

    VCF IN voltage. The VCF IN voltage can be correlated to equivalent dial settings as given in Table below. VCF voltage Equivalent dial Setting FG-7002C FG-7005C 0.02 0.05 Correlation between VCF IN voltage and equivalent dial setting(dial set to Min.) 1.888.610.7664...

  • Page 22: Programmed Frequency Selection

    C. The FREQ. dial is usually set to 0.02 when using external VCF control. This reduces the dialed VCF voltage to zero and allows the external VCF voltage to exercise complete control. It also reduces the effects of dial setting inaccuracy.

  • Page 23: Use As Externally Controlled Sweep Generator

    2) Considerations Minimum FREQ. dial setting is recommended for most sweep generator operation. The dial setting determines the lowest frequency of generator. The sweep generator will sweep upward from that point. However, it will sweep upward only to the range limit (highest frequency to which the dial can tune on the selected range).

  • Page 24: Maintenance

    F. LOW PASS FILTER : If necessary, engage the LPF (low pass filter) switch. This route the input through a low pass filter (-3 dB point of approximately 100 KHz) before application to the frequency counter. This helps eliminate counting errors in low frequency measurements by minimizing effects of high frequency noise present on the input.

  • Page 25: Fuse Replacement

    4-1. Fuse replacement Disconnect and remove all connections from any live power source. Unscrew fuse holder by screw driver. Locate the defective fuse and remove it by gently pulling-out. Install a new fuse of the SAME SIZE AND RATING. Screwing fuse holder. CAUTION MAKE SURE THAT THE RATED AND SPECIFIED FUSES ARE USED FOR REPLACEMENT.

  • Page 26: Troubleshooting By Signal Substitution

    Inject the type of signal normally used by the equipment being tested. This instrument can generate almost any type of signal normally required in the frequency range (FG-7002C:0.02Hz to 2MHz, FG-7005C: 0.05Hz to 5MHz). If the equipment under test, It can generate unique sounds or signals by means of sweep that should be easily distinguishable from any other signals that may be present.

  • Page 27: Amplifier Overload Characteristics

    5-4. Amplifier Overload Characteristics The overload point for some amplifiers is difficult to determine by using sinewave input. The triangle waveform is ideal for this type of test because any departure from absolute linearity is readily detectable. By using the triangle output, the peak overload condition for an amplifier can be readily determined.

  • Page 28: Amplifier Performance Evaluation Using Square Waves

    5-5. Amplifier Performance Evaluation Using Square Waves The standard sinewave frequency reopens curves do not give a full evaluation of the amplifier transient response. the square wave, because of the high harmonic content, yields much information regarding amplifier performance when used in conjunction with an oscilloscope.
  • Page 29 Dual Trace Oscilloscope Preferred Square Wave Selected FIG 7. AMPLIFIER PERFORMANCE EVALUATION USING SQUARE WAVES. 1.888.610.7664 www.calcert.com sales@calcert.com...
  • Page 30 A. Test Set-up B. Equivalent Circuit Of Test Set-Up GENERATOR C. Graph Of Results FIG 8. TESTING SPEAKER SYSTEMS AND IMPEDANCE NETWORKS. 1.888.610.7664 www.calcert.com sales@calcert.com...

  • Page 31: Testing Speakers And Impedance Networks

    5-6. Testing Speakers and Impedance Networks This instrument can be used to provide information regarding the input impedance of a speaker or any other impedance network vs. frequency. In addition, the resonant frequency of the network can be determined. A. Connect equipment as shown in Test Set-Up in FIG. 8 for frequency response measurement except that the signal input to the speaker or impedance network is monitored.

  • Page 32: Digital Frequency Selection

    5-7. Digital Frequency Selection Frequencies can be switched electronically by using the set-up shown in FIG. 9. The preset voltages can be digitally selected and applied to the VCF IN BNC. Although provision for two frequencies are shown, additional frequencies can be added using redundant circuits.
  • Page 33 This is marking shown on the product or its literature, indicates that it should not be disposed with other household wastes at the end of its working life. To prevent possible harm to the environment or human health from uncontrolled waste disposal, please separate this from other types of wastes and recycle it responsibly to promote the sustainable reuse of material resources.
  • Page 34 1.888.610.7664 www.calcert.com sales@calcert.com...

This manual is also suitable for:

Fg-7005c

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