GW Instek GRF-1300 User Manual
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GW Instek GRF-1300 User Manual

Rf & communication trainer
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RF & Communication Trainer
GRF-1300
STUDENT BOOK
USER MANUAL and TEXT BOOK
GW INSTEK PART NO. 82RF-13000MA1
ISO-9001 CERTIFIED MANUFACTURER

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Summary of Contents for GW Instek GRF-1300

  • Page 1 RF & Communication Trainer GRF-1300 STUDENT BOOK USER MANUAL and TEXT BOOK GW INSTEK PART NO. 82RF-13000MA1 ISO-9001 CERTIFIED MANUFACTURER...
  • Page 2 This manual contains proprietary information, which is protected by copyright. All rights are reserved. No part of this manual may be photocopied, reproduced or translated to another language without prior written consent of Good Will Corporation. The information in this manual was correct at the time of printing. However, Good Will continues to improve its products and therefore reserves the right to change the specifications, equipment, and maintenance procedures at any time without notice.

  • Page 3: Table Of Contents

    Table of Contents able of Contents SAFETY INSTRUCTIONS ............2 ABOUT THIS BOOK ............5 INTRODUCTION to the GRF-1300 ........6 Package Contents ................... 8 Product Specifications and Function .............. 8 Usage Instructions ..................9 OVERVIEW of the TIME and FREQUENCY DOMAIN..15 Observation from a different perspective .............

  • Page 4: Safety Instructions

    Warning: Identifies conditions or practices that could result in injury WARNING or loss of life. Caution: Identifies conditions or practices that could result in CAUTION damage to the GRF-1300 or to other objects or property. DANGER High Voltage Attention: Refer to the Manual Protective Conductor Terminal Earth (Ground) Terminal Do not dispose electronic equipment as unsorted municipal waste.
  • Page 5 Disconnect the power cord before cleaning the device. Cleaning the • GRF-1300 Use a soft cloth dampened in a solution of mild detergent and • water. Do not spray any liquid into the device. Do not use chemicals containing harsh products such as benzene, •...
  • Page 6 GRF-1300 User Manual and Teaching Materials Do not dispose this device as unsorted municipal waste. Please use a Disposal separate collection facility or contact the supplier from which this instrument was purchased. Please make sure discarded electrical waste is properly recycled to reduce environmental impact.

  • Page 7: About This Book

    About this Book BOUT THIS BOOK This textbook was developed in conjunction with the GRF- 1300 RF & Communication Trainer and the GSP-730 3GHz spectrum analyzer as an RF communications education system. It not only offers detailed examples, but also the practical knowledge necessary for RF measurements, such as spectrum analyzer principals, as well as AM and FM communication systems.

  • Page 8: Introduction To The Grf-1300

    The GRF-1300 is a well designed training kit capable of producing a 3MHz baseband signal and a carrier signal up to 900MHz. The GRF-1300 is also able to perform AM and FM RF circuit experiments as well. The practical exercises in the training kit meet the needs of most general RF courses.
  • Page 9 RF circuit experiments. Specific experiments will be highlighted in later chapters. The GRF-1300 RF & Communication Trainer is designed to modulate an audio signal with a carrier waveform. The system takes into account the difficulties arising from RF circuit theory and knowledge.

  • Page 10: Package Contents

    GRF-1300 User Manual and Teaching Materials Package Contents This package contains the GRF-1300 unit, RF cable – 2 * 10cm, RF cable 1* 80cm, a user manual CD, a student book, an antenna, a power cord and so on. Title...

  • Page 11: Usage Instructions

    When the waveform is selected, the corresponding LED light will be lit up. • The Reset button is used to reset the GRF-1300. When reset, the GRF-1300 will output a 0.10MHz sine wave baseband signal and a carrier signal with a frequency 880MHz.
  • Page 12 GRF-1300 User Manual and Teaching Materials • The four-digit display is used to display the frequency of the output baseband signal. • TP4 (test point 4) is used to used to monitor the output signal from the output port. • The potentiometer knob is used to adjust the voltage of the output baseband signal.
  • Page 13 (B1, B2, B3, B4, B5). An oscilloscope can be used to detect/determine the status of the circuitry at these test points. Figure A-7. Circuit location of each test point 8. Install the GRF-1300 driver onto the PC.
  • Page 14 GRF-1300 User Manual and Teaching Materials • Connect the GRF-1300 to the PC. Below are the steps for installing the software. Add the install software to the install directory. Click next and a window as shown below appears. Figure A-8.
  • Page 15 Introduction to the GRF-1300 Figure A-10. Operation interface for HyperTerminal...
  • Page 16 GRF-1300 User Manual and Teaching Materials 9. Below is a table listing each instruction and a description of each function. Instruction Function *IDN? Returns the manufacturer, model name and serial number. Returns the value on the digital display of the FM/RF module.

  • Page 17: Overview Of The Time And Frequency Domain

    Overview of the Time and Frequency Domain VERVIEW of the TIME and FREQUENCY DOMAIN Observation from a different perspective When a signal is said to be in the time domain, it means that the signal is expressed as a function of time. For example, if we describe a sine wave signal that repeats once each microsecond (μsec, 10 ), it means that the period of the signal is 1...
  • Page 18 GRF-1300 User Manual and Teaching Materials from an oscilloscope and power (dBm) from a spectrum analyzer. Voltage and power can be converted from one to the other, so both of them can be used to display the strength of a signal.
  • Page 19 Overview of the Time and Frequency Domain Time domain Frequency domain...
  • Page 20 GRF-1300 User Manual and Teaching Materials NOTES...
  • Page 21 Overview of the Time and Frequency Domain NOTES...
  • Page 22 GRF-1300 User Manual and Teaching Materials NOTES...
  • Page 23 Overview of the Time and Frequency Domain NOTES...
  • Page 24 GRF-1300 User Manual and Teaching Materials NOTES...

  • Page 25: An Introduction To Spectrum Analyzers

    An Introduction to Spectrum Analyzers N INTRODUCTION to SPECTRUM ANALYZERS Spectrum analyzers are one of the most important instruments for RF microwave measurements. Being familiar with spectrum analyzers in general is very important for operating high frequency microwave equipment or for performing communication measurements.

  • Page 26: Attenuator

    GRF-1300 User Manual and Teaching Materials Figure B-1. The basic structure of a Mixers Detection broadband RF Input receiver & Display BPFs Unit Tunable LOs Next, we are going to introduce the other basic functional blocks that a spectrum analyzer is composed of. These blocks are often mentioned when instructed on how to use a spectrum analyzer.
  • Page 27 An Introduction to Spectrum Analyzers Figure B-3. Mixers Basic structure of RF Input Detection a resolution bandwidth filter & Display Unit BPFs Filter Attenuators Tunable LOs Figure B-4 shows how two different RBW filters distinguish between two signals that are close to each other in frequency. The bandwidth of RBW2 is wider that of RBW1.
  • Page 28 GRF-1300 User Manual and Teaching Materials Signal under test Figure B-5. The effect of different RBWs Results RBW1 RBW2 Detector Following the RBW filter, the detector detects the power and coverts it to DC voltage via an ADC so that it can be displayed.
  • Page 29 An Introduction to Spectrum Analyzers Figure B-8 shows how the VBW affects the displayed output. If the signal under test passes through two different VBW filters, in which VBW1 is less than VBW2, we can see that the magnitude of the noise floor of VBW2 is greater than that in VBW1.
  • Page 30 GRF-1300 User Manual and Teaching Materials NOTES...
  • Page 31 An Introduction to Spectrum Analyzers NOTES...

  • Page 32: Rf Communication And Signals Experiments

    In this chapter we will explain the basic operating principals of a spectrum analyzer and introduce the measurement experiments. Prior to this, we will briefly explain how to operate the GW Instek GSP-730 spectrum analyzer. For more detail about its operation, please refer to the GSP-730 user manual.

  • Page 33: Experiment 1: Basic Operation Of A Spectrum Analyzer

    RF Communication and Signals Experiments Experiment 1: Basic Operation of a Spectrum Analyzer In addition to the sky, oceans and forests, there is an Relevant information invisible, intangible, inaudible and complex electromagnetic network in our living environment. This network is intertwined with wireless signals of various frequency bands.
  • Page 34 GRF-1300 User Manual and Teaching Materials The figure above is a screen shot from a typical spectrum analyzer display. The horizontal setting is frequency and the vertical axis is amplitude. Therefore a spectrum analyzer is basically used to perform frequency and amplitude-related measurements.
  • Page 35 RF Communication and Signals Experiments Step3 Step4 Now we should see some signals on the spectrum analyzer screen. Identify the three highest peaks and write down their frequency values. The reference level can be used to adjust the strength of the signal. As mobile phones use frequency hopping, we can use the Peak Hold function to hold the reading of the signal on the display screen.
  • Page 36 GRF-1300 User Manual and Teaching Materials Frequency: _____Amplitude:_____ Frequency: _____Amplitude:_____ Table 1-1. Frequency and amplitude of mobile phone’s transmitter signal. In addition to the mobile phone signal, what other wireless Question signals can be measured in the environment?

  • Page 37: Experiment 2: Measuring A Baseband Waveform

    Adapter N-SMA Measurement and analysis on a basic signal. Experiment goals To understand how to use the GRF-1300 system to output a baseband signal. Set the GRF-1300 to output a 1MHz sine waveform and use Experiment principles the GSP-730 to measure its spectrum. The working principle of a spectrum analyzer has been introduced in a previous chapter.
  • Page 38 GRF-1300 User Manual and Teaching Materials Step2 Step3 Connect the baseband signal from the output port of the GRF- 1300 to the input terminal of the GSP-730 using the RF wire. Set the GSP-730 as follows: • Center frequency: 2.5MHz •...
  • Page 39 RF Communication and Signals Experiments After step 6 is done, make sure the "Delta" marker is used for the next steps and not the "Normal" marker. Set the Delta Marker to the peak point of each harmonic and make a record by drawing a simple sketch of the spectrum in table 2-1.
  • Page 40 GRF-1300 User Manual and Teaching Materials The 2 harmonic ratio is: The 3 harmonic ratio is: Table 2-1. 1MHz sine wave spectrum test results 1. What is the spectrum of a theoretical sine wave and why is it Question different with the actual measured one? 2.

  • Page 41: Experiment 3: Different Baseband Waveforms And Their Harmonic Measurement

    Fourier series. Item Equipment Quantity Note Experiment Spectrum analyzer GSP-730 equipment RF & Communication Trainer GRF-1300 Oscilloscope GDS-2204 RF wire 800mm Adapter N-SMA 1. Measure the harmonic content that is output from the Experiment baseband signal.
  • Page 42 3. We won’t repeat it again here. We will become familiar with using a spectrum analyzer Experiment and how to use the GRF-1300 by analyzing the spectrum of a contents simple triangle and square wave signal. 1. Turn on the GRF-1300 and the GSP-730.
  • Page 43 Marker to the peak point of each harmonic and make a record by drawing a simple sketch of the spectrum in table 3-1. Step Step 6. Select the square wave on the GRF-1300 Baseband module. Do the same spectrum measurements that were performed in the previous steps. Step8 7.
  • Page 44 GRF-1300 User Manual and Teaching Materials harmonic ratio of each harmonic using the following steps: Step10 Marker Step11 Marker In accordance to the method that is used above to measure the harmonic ratio, students can try to measure the harmonic ratio of the higher order harmonics.
  • Page 45 RF Communication and Signals Experiments A(t) Table 3-2. Time domain waveform of the 1MHz triangle wave. Table 3-3. 1MHz square wave spectrum test results. A(t) Table 3-4. Time domain waveform of the 1MHz square wave.
  • Page 46 GRF-1300 User Manual and Teaching Materials 2. For the triangle waveform, measure the harmonic ratio of the and 5 harmonic. For the square waveform, measure the harmonic ratio of the 2 and 3 harmonic. Harmonic ratio of the 3rd harmonic...
  • Page 47 RF Communication and Signals Experiments Harmonic ratio of the 2 harmonic (square wave) Harmonic ratio of the 3 harmonic (square wave) 1. Compare the measurement results from the frequency Question domain and the time domain, and consider the relationship to the Fourier series theory.

  • Page 48: Experiment 4: Measurement Of The Rf Carrier

    RF & Communication Trainer GRF-1300 RF wire 800mm Adapter N-SMA Measure an RF signal from the GRF-1300 RF & Experiment goals Communication Trainer. Also perform measurements on more important parameters such as phase noise and harmonic distortion. A Phase locked loop (PLL) is a phase error control system. It...
  • Page 49 RF Communication and Signals Experiments Figure 4-1. PLL circuit structure Above: PD is the phase-locked loop phase detector, LF is the loop filter and VCO stands for voltage-controlled oscillator. The purity of the output signal from the VCO is directly related to the phase noise.
  • Page 50 2. Measure the harmonic distortion of the RF signal. 3. Measure the phase noise of the RF signal. Experiment steps 1. Turn on the GRF-1300 and GSP-730. Leave the GRF-1300 in its Measure the RF signal spectrum power-on state. and harmonic distortion.
  • Page 51 2. Set the GRF-1300 RF Synthesizer/FM as follows: • Carrier frequency: 875MHz Step1 3. Connect the RF/FM output port on the GRF-1300 to the input terminal on GSP-730 with the RF cable. 4. Set the GSP-730 as follows: • Center frequency: 875MHz •...
  • Page 52 GRF-1300 User Manual and Teaching Materials Record the value, then calculate the phase noise according to the formula, and record the spectrum and measurement results in Table 4-3. 6. Adjust the PLL output frequency to 900MHz, and again measure the power and phase noise corresponding to the frequency.
  • Page 53 RF Communication and Signals Experiments 1. Measurement of the RF signal spectrum. Experiment results Table 4-1. RF Signal Spectrum 2. RF Signal Harmonic measurements Table 4-2. RF Signal Spectrum 2nd Harmonic measurement 3rd Harmonic measurement...
  • Page 54 GRF-1300 User Manual and Teaching Materials 3. Phase noise measurement results Table 4-3. Carrier Experiment results Phase Noise Frequency measurement results 875MHz Carrier frequency:_____ Output power:_____ Phase noise:_____ 900MHz Carrier frequency:_____ Output power:_____ Phase noise:_____ 910MHz Carrier frequency:_____ Output power:_____...
  • Page 55 RF Communication and Signals Experiments A PLL circuit is formed by which parts? Explain the function Questions of each part. What are the advantages of a PLL? Explain the causes of phase noise? How can we improve phase noise? Be sure to tighten the connectors when connecting the RF cable. Caution...
  • Page 56 GRF-1300 User Manual and Teaching Materials NOTES...
  • Page 57 RF Communication and Signals Experiments NOTES...
  • Page 58 GRF-1300 User Manual and Teaching Materials NOTES...
  • Page 59 RF Communication and Signals Experiments NOTES...

  • Page 60: Experiment 5: Am Signal Measurement

    GRF-1300 User Manual and Teaching Materials Experiment 5: AM Signal Measurement Message signals are usually of a low frequency. In general, Relevant these low frequency signals are not appropriate for information transmission. Therefore, modulation is required to transmit messages for communication and test systems. Modulation is a signal adjustment method used in signal transmission.
  • Page 61 RF Communication and Signals Experiments This experiment begins with AM to learn some modulation theory. AM uses the modulating signal to control the amplitude of the high-frequency carrier signal. The modulating signal is used to alter the amplitude of the carrier in proportion to the amplitude of the modulating signal.
  • Page 62 GRF-1300 User Manual and Teaching Materials (unmodulated state) to an AM wave (modulated state). Figure 5-1. A diagram showing how an unmodulated carrier signal undergoes the process of modulation. Figure 5-2. AM waveform in the Ω time domain and the frequency domain ω...
  • Page 63 2. Measure the spectrum of the AM wave with different carrier frequencies and with modulating signals with different amplitudes. 1. Turn on the power to the GRF-1300 and GSP-730. Experiment steps 2. Set the GRF-1300 as follows: • Set the GRF-1300 to the default power-on state.
  • Page 64 GRF-1300 User Manual and Teaching Materials 4. Set up the GSP-730 as follows: • Center frequency:880MHz • Span: 5MHz • Reference level: 0dBm • RBW: Auto Step1 Step2 Step3 Step4 5. Use the Marker function to measure the carrier component of the AM wave on the spectrum analyzer and the power of the upper and lower sidebands.
  • Page 65 RF Communication and Signals Experiments 8. Turn the potentiometer clockwise to the maximum. Adjust the UP button on the Baseband module to adjust the frequency of modulating signal. Do you see any change in the AM wave spectrum? Compare the experiment results with that of the original baseband frequency of 100kHz and record it to Table 5- Step7 Step8...
  • Page 66 GRF-1300 User Manual and Teaching Materials 1. Changing modulating voltage Experiment results Table 5-4. Modulating Experiment results Experiment voltage results: Changing the Vpp: modulating voltage Carrier power:_____ Modulation index: :_____Lower sideband power: :_____ Vpp: Carrier power: :_____ Modulation index: :_____Lower sideband power: :_____...
  • Page 67 RF Communication and Signals Experiments Modulation index: :_____Lower sideband power: :_____ Conclusion: 2. Changing the modulating signal frequency. Table 5-5. Modulating Experiment results Experiment frequency results: Changing the 100kHz modulating signal frequency. Carrier power: :_____ Lower sideband power: :_____ 300Khz Carrier power: :_____ Lower sideband power: :_____...
  • Page 68 GRF-1300 User Manual and Teaching Materials 600kHz Carrier power: :_____ Lower sideband power: :_____ Conclusion: 3. Changing the carrier frequency. Carrier Experiment results Frequency Table 5-6. 882MHz Experiment results: Changing the carrier frequency. 880MHz...
  • Page 69 RF Communication and Signals Experiments 878MHz Conclusion: 1. If we change the frequency of the modulating wave but keep Questions the amplitude the same, will the AM wave be affected? 2. If the input cables on the AM modules were switched (Connect the baseband signal to the "RF in"...

  • Page 70: Experiment 6: Fm Signal Measurement

    GRF-1300 User Manual and Teaching Materials Experiment 6: FM signal measurement Since frequency modulation is a common type of modulation, Relevant it is important to learn the principles and characteristics of FM information waves. Compared to AM waves, the amplitude of an FM wave doesn’t carry the modulating signal information.
  • Page 71 RF Communication and Signals Experiments And the carrier signal is (t) = U cosω t = U cos2πf An FM signal varying to changes in the modulating signal is shown in Figure 6-1. Figure 6-1. An FM signal varying to the Ω...
  • Page 72 GRF-1300 User Manual and Teaching Materials is the offset of the angular frequency determined by the modulating signal U Ω The general expression for the FM signal: ∫ ω + ϕ cos[ u t dt Ω ∫ ω + Ω...
  • Page 73 0.5, 2.41 and 5. =2.41 m =0.5 The FM circuit in the GRF-1300 uses a phase-locked loop. Using a PLL circuit for FM modulation not only solves the center frequency stability problems in direct FM modulation but also the narrow FM range limitations when using a crystal oscillator.
  • Page 74 Observe how the amplitude of the modulating signal affects the FM wave frequency deviation. Observe how the frequency of the modulating signal affects the FM wave frequency deviation. 1. Turn on the GRF-1300 and GSP-730. Experiment steps 2. Set the GRF-1300 as follows: •...
  • Page 75 RF Communication and Signals Experiments Step1 Step2 Step3 Step4 4. Use the Marker function on the spectrum analyzer and measure the carrier position at this time. Step5 5. Turn the potentiometer clockwise to an arbitrary position. Measure the voltage with an oscilloscope. Does the FM wave spectrum change after the output amplitude of the modulating signal has changed? Follow the steps below to measure the frequency deviation and record it in Table 6-2.
  • Page 76 GRF-1300 User Manual and Teaching Materials Step10 10.Change the modulating signal frequency to 1MHz. Observe the change in the spectrum of the FM wave and record the results in Table 6-3. Step11 11.After the completing the experiment steps above, press the Reset button, and minimize the amplitude of the modulating signal in order to view the FM spectrum within a span of 50MHz.
  • Page 77 RF Communication and Signals Experiments 1. Changing the amplitude of the modulating signal. Experiment results Table 6-2. Modulatin Experiment result Experimental g voltage Results: Changing the Vpp: amplitude of the modulating signal Frequency deviation: FM index: Vpp: Frequency deviation: FM index: Vpp:...
  • Page 78 GRF-1300 User Manual and Teaching Materials Frequency deviation: FM index: Conclusion 2. Changing the frequency of an FM signal. Table 6-3. Modulating Experimental result Experimental frequency results: Changing the 100Khz frequency of the FM signal 300Khz 600kHz...
  • Page 79 RF Communication and Signals Experiments 1MHz Conclusion 3. Changing the carrier frequency Table 6-4. Carrier Experimental result Experimental frequency results: Changing the 875MHz carrier frequency 880MHz...
  • Page 80 GRF-1300 User Manual and Teaching Materials 890MHz Conclusion 4. Draw a table to record the time domain waveform of the AM wave that is measured by the oscilloscope. For FM waves, if we keep the modulation signal amplitude Question constant and double the modulation signal frequency, how will...

  • Page 81: Experiment 7: Using A Spectrum Analyzer In Communication Systems

    CDMA RF power and related fields. Item Equipment Quantity Note Experiment Spectrum analyzer GSP-730 equipment RF & Communication Trainer GRF-1300 RF wire 100mm RF wire 800mm Adapter N-SMA To understand ACPR measurement principles and to perform Experiment goal actual ACPR measurements.
  • Page 82 GRF-1300 User Manual and Teaching Materials 1. ACPR Measurement Experiment principles ACPR (Adjacent Channel Power Ratio) is the ratio of the amount of power leaked to an adjacent channel from the main channel. It represents how much power from the transmitter leaks into the transmission band of other channels.
  • Page 83 1300. 2. Measure the OCBW from the FM signal produced by the GRF- 1300. 1. Turn on the GRF-1300 and GSP-730. Experiment steps 2. Set up the GRF-1300 as follows: • Set the GRF to the power-on default state.
  • Page 84 GRF-1300 User Manual and Teaching Materials 3. Set up the GSP-730 as follows: • Center frequency:880MHz • Span: 10MHz • Reference level: -10dBm • RBW: Auto Step1 Step2 Span Step3 Amplitude Step4 4. Adjust the FM frequency deviation to 1MHz (2MHz in total) with the amplitude knob.
  • Page 85 Step4 The OCBW is default at 90%. Record the measurement data in Table 7-2 Step5 Adjust the frequency deviation of FM wave by adjusting the potentiometer of GRF-1300. Measure the OCBW again and record the results to table 7-2. Record the measurement data in Table 7-2 1.
  • Page 86 GRF-1300 User Manual and Teaching Materials 1MHz frequency deviation results 2MHz frequency deviation results Table 7-1. ACPR measurement results Item Test No. Lower ACPR1 Upper ACPR1 Lower ACPR2 Upper ACPR2 Average 2. OCBW measurement results...
  • Page 87 RF Communication and Signals Experiments 1MHz frequency deviation results 2MHz frequency deviation results Table 7-2. OCBW measurement results OCBW％：_________ Test No. CH Power OCBW Average Describe the definition for ACPR? Questions Taking multiple measurements and the getting average value is Caution required for ACPR and OCBW measurements.

  • Page 88: Experiment 8: Measurement Of Communication Products

    GRF-1300 User Manual and Teaching Materials Experiment 8: Measurement of communication products The computer mouse has experienced nearly four decades Relevant of evolution and development since its inception in 1968. With information the popularity of consumer oriented computers over the past decade, the mouse has seen tremendous progress.
  • Page 89 RF Communication and Signals Experiments In this experiment we will use a 2.4G wireless mouse. It Experiment principles uses the so-called 2.4G frequency band. The advantage of the 2.4G band over the 27MHz band is that the 27MHz band has a shorter transmission distance and is prone to interference from other devices.
  • Page 90 GRF-1300 User Manual and Teaching Materials 4. A connection diagram is shown below. 5. A blue tooth device or wireless network card can also be used in the same way to create a signal to measure. Experiment results Transmitting frequency: _____...

  • Page 91: Experiment 9: Production Line Applications

    This saves a lot of time and can improve the efficiency of a production line. In this experiment, we will imagine that the GRF-1300 is in a production line environment. We will use the limit line function to perform a simple test to see if a product has passed the test and return the test results using remote commands.
  • Page 92 GRF-1300 User Manual and Teaching Materials Set the amplitude and frequency of each point. Use the arrow keys to move the cursor to each of the different points. Use the same method is used to edit both the upper and lower limit lines.
  • Page 93 1. Turn on the GRF-1300 and GSP-730. Experiment steps 2. Set the GRF-1300 to the power-on default state. 3. Connect the RF wire from the output port on the baseband module to the FM in port on the RF Synthesizer/FM module.
  • Page 94 6. According to the procedures above, students can set the limit lines. 7. Adjust the amplitude knob on the GRF-1300. Observe the Pass/Fail test results and record the results to table 9-1. 8. The same functionality can be achieved by sending remote commands from a PC using HyperTerminal.
  • Page 95 RF Communication and Signals Experiments 10MHz frequency deviation test results.

  • Page 96: Test For Learning Outcomes

    Experiment Aim: state or loses the lock state. Have an understanding of the overall communication system. The instructor will send remote commands to the GRF-1300 and Experiment create a malfunction. Students can use an oscilloscope, spectrum Contents analyzer and/or other measurement instruments to try to deduce/verify the cause of the malfunction/fault.
  • Page 97 Test for Learning Outcomes Fault 2 Fault description Hypothesis: Verification: 2: FM Fault Simulation Fault 1: Fault description: Hypothesis: Verification: Fault 2...
  • Page 98 GRF-1300 User Manual and Teaching Materials Fault description Hypothesis: Verification: Fault 3 Fault description: Hypothesis: Verification: Fault 4 Fault description Hypothesis:...
  • Page 99 Test for Learning Outcomes Verification: 3:AM Fault Simulation Fault 1 Fault description: Hypothesis: Verification: Fault 2 Fault description Hypothesis: Verification:...
  • Page 100 GRF-1300 User Manual and Teaching Materials Fault 3 Fault description Hypothesis: Verification: Fault 4 Fault description: Hypothesis: Verification:...
  • Page 101 Test for Learning Outcomes NOTES...
  • Page 102 GRF-1300 User Manual and Teaching Materials NOTES...
  • Page 103 Test for Learning Outcomes NOTES...
  • Page 104 GRF-1300 User Manual and Teaching Materials NOTES...

  • Page 105: Appendix

    Appendix PPENDIX We have included some commonly-used conversion tables for use with the questions. dBm Conversion Table dBm, dBuV and dBmV are all absolute units. i.e., they represent a physical quantity. The corresponding conversion tables are below: dBuV dBmV 0.001 7071.07 76.9897 16.9897...
  • Page 106 GRF-1300 User Manual and Teaching Materials The relationship between dB and dBc The figures in the table above are based on a 50Ω load. As an example, as -30dBm is equal to 0.001mW or 10 W, therefore with a 50Ω load it is 7071.07 uV or 0.007071mV. The formulas and derivations from the above table are: ×...

  • Page 107: Resistor Values In Π-Type Resistance Attenuators

    Appendix Resistor Values in π-type Resistance Attenuators 50Ω 50Ω dB R1 869.55 5.77 869.55 436.21 11.61 436.21 292.40 17.61 292.40 220.97 23.85 220.97 178.49 30.40 178.49 150.48 37.35 150.48 130.73 44.80 130.73 116.14 52.84 116.14 104.99 61.59 104.99 10 96.25 71.15 96.25 11 89.24...

  • Page 108: Resistor Values In T-Type Resistance Attenuators

    GRF-1300 User Manual and Teaching Materials Resistor Values in T-type Resistance Attenuators 50Ω 50Ω 2.88 433.34 2.88 5.73 215.24 5.73 8.55 141.93 8.55 11.31 104.83 11.31 14.01 82.24 14.01 16.61 66.93 16.61 19.12 55.80 19.12 21.53 47.31 21.53 23.81 40.59 23.81...

  • Page 109: Modulation Index And Sideband Amplitude Comparison Table

    Appendix Modulation Index and Sideband Amplitude Comparison Table...

  • Page 110: Declaration Of Conformity

    GRF-1300 User Manual and Teaching Materials Declaration of Conformity GOOD WILL INSTRUMENT CO., LTD. No. 7-1, Jhongsing Rd, Tucheng Dist., New Taipei City 236. Taiwan. GOOD WILL INSTRUMENT (SUZHOU) CO., LTD. No. 69 Lushan Road, Suzhou City(Xin Qu), Jiangsu Sheng, China. declare that the below mentioned product Type of Product: RF &...

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