4005 Manual - Global Specialties
Contents
1. D AC INLET 2 VOLTAGE SELECTOR 3 FUSE HOLDER GROUND TERMINAL JN es EN B 7 El NA Ne SEN f N 2 RON e VoULS PHB RDS vr ot ROX Av f nce o n TENE Th Lwe gosto d h tora oron amp votb Ed SR FO gt TY Otter hore 945 B O O E H EN i C c o Made in Korea J SA J Ne i 1 J LAN 8 Figure 2 REAR PANEL AC power input connector Selects the AC Power 115V or 230V Replace fuse by unscrewing 12 3 2 Operating Instructions This instrument is capable of generating a wide variety of waveforms as well as the ability of counting an external freguency with high resolution of 6 digits All of its benefits and features can be mastered by thoroughy understanding the operating procedures outlined in this manual One of the best ways to initially gain this familiarization is to connect the generator to an oscilloscope Observe the waveforms and notice the effects of the various controls on the waveforms Use this manual as a reference until becoming accustomed to operating procedures 3 3 Use as a Function Generator 1 Procedure A Connect AC power cord into the receptacle on the rear panel and plug into an AC inlet B To turn on equipm2. 9 2 2 Connecting AC Power 9 2 3 Cooling And Ventilation 9 RB OS ON ee eo ee ee 9 2 5 Warm Up E 9 3 OPERATION 3 1 Controls indicators and connectors 10 3 2 Operating instructions 13 3 3 Use As Function Generator 13 3 4 Use As Pulse Generator 16 3 5 TTL CMOS Output 18 3 6 Use As FM Signal Generator 18 3 7 External Control Of VCF 19 3 8 Programmed Frequency Selection 20 3 9 Use As Sweep Generator 21 3 10 Use As Externally Controlled Sweep Generator 21 3 11 Use As External Frequency Counter 21 4 MAINTENANCE 4 1 Fuse Replacement 23 4 2 Adjustment And Calibration 23 4 3 Cleaning and decontamination 23 1 Model 4005 PRODUCT DESCRIPTION 1 1
3. Global y VSpecialties Revision 11 2010 Model 4005 5MHz Sweep Function Generator Thank you for purchasing the Model 4005 For proper use of this precision instrument please read this operation manual carefully Note 1 To fully maintain the precision and reliability of the 4005 please use it within the range of its intended use temperature 10 C 35 C humidity 45 85 2 Please allow a pre heating period of 30 minutes before use 3 This instrument should be used with a triple line power cord for safety 4 Specification of this instrument may be changed without notice 5 Please contact Global Specialties if you have further questions beyond the scope of this manual Safety Summary Please take a moment to read these operating instructions thoroughly and completely before operating this instrument Pay particular attention to WARNINGS used for conditions and actions that may pose a hazard to the user and CAUTIONS used for conditions and actions that may damage the instrument e Always inspect the instrument and other accessories for any sign of damage or abnormality before every use Never ground yourself and keep your body isolated from ground Never touch exposed wiring connections or any live circuit conductors e Donotinstall substitute parts or perform any unauthorized modification to the instrument e Use caution when working above 60V DC or 30V AC rms Such voltages pose a shock hazard
4. 20 dB fixed and continuously variable more than 20dB m WAVEFORM CHARACTERISTICS Sine wave Flatness 3dB to5 MHz more than 14Vpp Distortion Less than 1 at 10 Hz to 100 KHz Sguare wave Rise and Fall Time Less than 25 nS at 5MHz Triangle wave Linearity More than 99 at 0 5 Hz to 100 KHz TTL Output Rise and Fall Time Less than 30 nS at 1MHz Output Level TTL Level H 2 4V L 0 4V CMOS Output Rise and Fall Time Less than 180 nS at 1MHz Output Level 4V to 15V 2V Variable DUTY RATIO 1 1 to 10 1 B SWEEP FUNCTION CHARACTERISTICS Mode Width Rate External VCF Input Input Impedance Linear Variable from 1 1 to 100 1 0 5 Hz to 50 Hz 20 mS to 2 S Input Voltage 0 to 10 V Approx 1 KO m FREOUENCY COUNTER CHARACTERISTICS Display Freguency Range Accuracy Time base Input Sensitivity Input Impedance Max Input Voltage 6 Digit Seven Segment Green LED Gate time MHz KHz Hz and mHz 2Hz to 50 MHz with Auto Range Time base Error 1 count 10 MHz Crystal Oscillator 20ppm 200 mVrms 2Hz 100Hz 100mV rms 100Hz 50MHz 500 250 Vpp m PHYSICAL CHARACTERISICS e Dimensions WHD e Weight 3 4 x 3 5 x 10 6 240 x 90 x 270mm Approx 5 5 Ib 2 5 kg 1 3 Eguipment Ratings e Plugand Socket 3 wire AC power plug and 3 wire outlet Power amp Fuse Ratings 103 126V AC 50 60Hz F 0 5A 250V a 206 252V AC 50 60Hz F 0 2A
5. 250V e Operating Environment TEMPERATURE 0 C to 40 C Accuracy Specified at 23 C 5 C HUMIDITY up to 85 to 40 C without temperature extremes which may cause condensation within the instrument e Storage Environment TEMPERATURE 20 C to 70 C HUMIDITY below 85 RH Overvoltage Category CAT II Insulation Category II Portable equipment Pollution Degree 2 Protection to IEC 529 Ordinary Note Specifications are subject to change without notice Please visit www globalspecialties com for the most current product informaiton 1 4 Supplied Accessories Users Manual 1 e BNC Cable 1 Power Cord 1 Spare Fuse 1 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 that supplied accessories are present and correct 2 2 Connecting AC Power This instrument reguires 115V AC or 230V AC 50 60 Hz power socket with protective earth contact PE contact CAUTION AC POWER OF THIS IN
6. Yorba Linda CA 92887 USA TEL 800 872 1028 FAX 714 921 6422 www globalspecialties com 27
7. e Remember that line voltage is present on some power input circuit points such as on off switches fuse power transformers etc even when the equipment is turn off e Also remember that high voltage may appear at unexpected points in defective equipment o Safety Symbols 1 O Protective earth ground To identify any terminal which is intended for connection to an extemal conductor for protection against electric shock in case of a fault or the terminal of a protective earth ground electrode 2 L Functional earth terminal on the rear panel 3 CIL IN position of a bi stable push control To associate the IN position of a bi stable push contro witn the corresponding function OUT position of a bi stable push control 4 li To associate the OUT position of a bi stable push control with the corresponding function Alternating current D EN To indicate on the rating plate that the equipment is suitable for alternating current only to identify relevant terminals 6 N Caution risk of danger 2 A Caution risk of electric shock CONTENTS 1 PRODUCT DESCRIPTION 1 1 1 0 0 U eii OI p ee EEE 6 1 2 Technical Specifications 6 1 3 Equipment Ratings 8 1 4 Supplied Accessories 8 2 INSTALLATION 2 1 Initial Inspection
8. Introduction The 4005 is designed to be used as a FUNCTION GENERATOR SWEEP GENERATOR PULSE GENERATOR and a FREQUENCY COUNTER offering a wide range of applications in both analog and digital electronics such as engineering manufacturing servicing education and hobbyist fields VCF voltage controlled frequency produces precision sine square and triangle waves over the 0 05Hz to 5MHz 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 Variable symmetry of the output waveforms converts the instrument to a pulse generator capable of generating rectangular waves or pulses ramp or sawtooth waves and skewed sine waves of variable duty cycle The sweep generator offers linear sweep with variable sweep rate and sweep width up to 100 1 freguency change The freguency response of any active or passive device up to 5 MHz can be determined 1 2 Technical Specifications m OUTPUT CHARACTERISTICS Waveforms Sine Square Triangle Skewed Sine Pulse Ramp Sawtooth TTL CMOS Leveled Square DC Frequency Range 0 05Hz to 5MHz in 7 Ranges 5 50 500 5K 50K 500K 5M Frequency Accuracy 2 5 50 500 5K 50K 500K 5MHz Range Full Scale Output Level Sine amp Tringle wave 20 Vpp in open circuit 10 Vpp into 500 Load Square Wave 19 Vpp in open circuit 9 5 Vpp into 500 Load Output Impedance 500 5 Attenuator
9. 23 This marking shown on the product or literature indicates that it should The product should not be disposed with other household wastes 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 Household users should contact either the retailer where they purchased this product or the appropriate local agency for details of where and how they can take this item for environmentally safe recycling Business users should contact their supplier This product should not be mixed with other commercial wastes for disposal 24 UN Global Specialties Limited One Year Warranty Global Specialties LLC warrants to the original purchaser that this product and its component parts will be free from defects in workmanship and materials for a period of one year from the date of purchase Global Specialties LLC will without charge repair or replace at its option defective product or component parts Returned product must be accompanied by proof of the purchase date in the form a sales receipt To obtain warranty coverage this product must be registered by visiting www globalspecialties com warranty php and completing the online registration form within fifteen 15 days of purchase Exclusions This warranty does not apply in the event of misuse or abuse of the product or as a result of unauthorized al
10. CUIT UNDER TEST NOTE THE OVERVOLTAGE CATEGORY OF THE EXTERNAL FREQUENCY INPUT TERMINAL IS CAT I IT IS PERFORMED ON CIRCUITS DIRECTLY CONNECTED TO THE LOW VOLTAGE INSTALLATION 22 4 MAINTENANCE CAUTION IT IS ESSENTIAL FOR SAFETY TO PROPERLY MAINTAIN AND SERVICE THIS INSTRUMENT WARNING VOLTAGES WITHIN THIS INSTRUMENT ARE SUFFICIENTLY HIGH AND MAY BE LIFE THREATENING COVERS MUST NOT BE REMOVED EXCEPT BY PERSONS QUALIFIED AND AUTHORIZED TO DO SO EXTREME CAUTION MUST BE OBSERVED ONCE THE COVERS HAVE BEEN REMOVED 4 1 Fuse replacement Disconnect and remove all connections from any live power source Unscrew fuse holder with a screw driver Locate the defective fuse and remove it with caution Install a new fuse of the SAME SIZE AND RATING ocrewing fuse holder CAUTION MAKE SURE THAT THE RATED AND SPECIFIED FUSES ARE USED FOR REPLACEMENT 4 2 Adjustment and Calibration It is recommendable to calibrate the Model 4005 every 12 months Calibration and repair should only be performed by qualified and authorized personnel 4 3 Cleaning and Decontamination The instrument can be cleaned with a soft clean cloth to remove any oil grease or grime Never use liquid solvents or detergents If the instrument gets wet for any reason dry the instrument using low pressure clean air at less than 25 PSI Use care and caution around the window cover areas where water or air could enter into the instrument while drying
11. ON 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 Adjust the shorter duration portion of the waveform pulse width for pulse fall time for ramp Waves with the frequency controls FREQ dial and RANGE switch 16 b Adjust the longer duration portion of the waveform rest time for pulses rise time for ramp waves with the SYMMETRY control D If a specific pulse width specific fall time for ramp wave is not critical but a specific repetition rate is reguired the desired waveform may be obtained as follows a Observe the oscilloscope and adjust the SYMMETRY control to obtain the approximate desired pulse width vs rest time ratio rise time vs fall time ratio for ramp waves b Adjust the repetition rate with the frequency controls FREQ dial and RANGE switch The freguency controls affect both the pulse width and repetition rate 2 Considerations A When generating ramp waves or skewed sine waves it may be easier to measure the time periods on oscilloscope using the square wave mode then switch to the desired operating mode B For ease and accuracy in measurement use a higher sweep speed on the oscilloscope to expand the pulse width for measurement and then reduce the sweep speed to measure the repetition rate C Repetition rate may be expressed as a freguency or time period Measure the repetition rate as a t
12. STRUMENT IS PRESET TO 115V IN FACTORY BEFORE POWERING ON THIS INSTRUMENT CHECK AND MAKE SURE THE VOLTAGE OF THE POWER SOURCE IS SAME WITH THE MARKING OF UNIT FOR USE WITH AC230V THE VOLTAGE SELECTOR on rear panel SHOULD BE SWITCHED TO THE 230V POSITION 2 3 Cooling and Ventilation No special cooling and ventilation is reguired However the instrument should be operated where the ambient temperature is maintained 2 4 Position This instrument is built as a bench type instrument with rubber feet and tilt stand in place Stand up angle can be adjusted by rotating angle of carrying handle 2 5 WARM UP Allow 30 minutes for the unit to warm up so that it is stabilized and ready for use 3 OPERATION 3 1 Controls Indicators and Connectors c a rrr MrM 7rESIESB Marion 4005 5 MHz SWBRPIRUNCTIGN GENERATOR 6 SIO OOo Sog IC Pd a a o a a a EET m w p GT Mis Wis Js milis n ie m Ld M L k AD G E A ue aa r voide a y mm eae J 9 55 O 6 0 E 3 Figure 1 FRONT PANEL OPERATOR S CONTROLS POWER SWITCH Push for Power On Off 2 RANGE SWITCHES Frequency Range Selector 9 FUNCTION SWITCHES Select Sine wave Triangle Wave or oquare Wave Output ATTENUATOR Selects Output Level by 20 dB INTERNAL EXTERNAL SWITCH IN for External Freguency Counter OUT for Internal Freguency Counter LOW PASS FILTER With this switch pushed in the input is routed throug
13. UT BNC on the front panel This signal is unaffected by the AMPLITUDE ATTENUATOR or DC OFFSET TTL output is a sguare wave for use in digital circuits even though FUNCTION SWITCH is on sine or triangle wave 2 Considerations CAUTION KNOWLEDGE OF THE FOLLOWING FACTORS IS ESSENTIAL FOR PROPER OPERATION OF THE INSTRUMENT A The DC offset control can provide over 10 volts open circuited or 5 volts into 500 load Remember that the combined signal swing plus DC offset is also limited to 10 V open circuited or 5 V into 500 Clipping may occur slightly above these levels FIG 4 illustrates the various operating conditions encountered when using DC offset If the desired output signal is large or if a large DC offset is used an oscilloscope should be used to make sure that the desired combination is obtained without clipping Keeping the Amplitude control in the lower half of its adjustment range reduces the probability of clipping B To set the DC offset to zero or a specific DC voltage depress the Function Switches slightly so that all switches are released all buttons out This removes the signal from the output and leaves the DC only Measure the DC output on an oscilloscope or DC voltmeter and adjust the DC offset control for the desired value 14 C It is easier to accurately set the FREO dial if settings between 0 1 and 5 0 are used Since the dial rotation overlaps ranges it is not usually necessary to use readings b
14. cts of dial setting inaccuracy D If the summed dial setting and VCF IN voltage exceeds 10 volts oscillation ceases and no output is produced If the swing of the VCF IN signal is too great oscillation will cease each time the instantaneous voltage reaches the limit 3 8 Programmed Freguency Selection A specific output frequency can be selected each time a specific VCF input voltage is applied assuming a common dial setting Such operation may be advantageous where there is a requirement to return to a specific frequency periodically Eliminating the need for frequency measurement reduces set up time and precision tuning each time frequency is needed Just set the dial against its lower stop and turn on the external VCF voltage Using multiple DC voltage values which may be selected by a switch or electronic switching circuits may be valuable in programming a set of two or more specific frequencies This type of operation would be desirable in production testing where signals at several specific frequencies are required for various tests FSK frequency shift keying signals also may be generated in this manner To maintain the original accuracy each time the operation is repeated the FREQ dial must be accurately set to the same position Probably the easiest way to assure this common dial setting is to set it against its lower stop 0 05 20 Additional information on programmed freguency selection is given in the APPLICATIONS chapte
15. elow 1 If this occurs change to a lower range and use a higher dial setting 5V A Zero DC Offset with maximum signal oy 5V B Offset limits f oV without Clipping Positive Negative DC Offset DC Offset 5V C Excessive Offset all example OV output terminated in 50 5V Positive Negative DC Offset DC Offset Figure 4 USE OF DC OFFSET CONTROL D The main output BNC is labeled 500 This means that the source impedance is 500 but the output may be fed into any circuit impedance The output level varies in proportion to the terminating impedance If it is desired to maintain a constant output level while injecting signal into various circuits with various impedance constant terminating impedance is necessary When the generator output is connected to a coaxial connector on the equipment under test its usually a moderate to high impedance A reasonably constant terminating impedance may be maintained while injecting signal into moderate and high impedance circuits 50082 and up by adding a coaxial tee in the output cable and connecting a 500 termination to one leg Remove the 500 termination when injecting into a 502 circuit Also to keep DC injection point the DC offset should be set to match the circuit voltage or blocking capacitor may be required to avoid DC loading with 500 E When using the higher output frequencies while using the square wave output terminate the cable in 500 t
16. ent push power on off switch on C To make sure that the output is symmetrical and unaffected by the sweep generator set the following controls as below CONTROLS POSITION oweep width OFF push Symmetry OFF push DC offset OFF push Attenuator RELEASE button out Counter INTERNAL button out D To select the desired frequency set the Range Switch and FREQ dial as follows The output frequency equals the FREQ dial setting multiplied by the Range Switch setting For example a FREQ dial setting of 0 5 and a Range switch setting of 50K produces a 2 5 KHz output A FREQ dial setting of 5 0 and a Range switch setting of 5M produces 5 MHz output It also can display the desired frequency of 6 digits F Select sine square or triangle wave output by pressing the corresponding FUNCTION button FIG 3 illustrates the output waveforms and their phase relationships G Connect a cable from the 500 BNC to the point where it is desired to inject the signal H Adjust the 500 output to the desired amplitude with the AMPLITUDE control 13 TTL Pulse OV sa Triangle OV LIT Sine OV LN Square OV Figure 3 OUTPUT WAVEFORMS AND PHASE RELATIONSHIPS A positive or negative DC component can be added to the signal at the 500 BNC by use of the DC OFFSET control as required by the circuit into which the signal is being injected J A fixed amplitude TTL square wave is available at the TTL O
17. h a SWITCH LPF low pass filter with 3dB point of approximately 100KHz DISPLAY 6 Digit 0 4 Green 7 segment display GATE TIME INDICATOR Gate Time is selected automatically by the input signal MHz KHz Hz mHz INDICATOR Indicates Unit of Frequency 9 COARSE FREQUENCY DIAL Controls the output coarse frequency in the selected range 10 G FINE FREQUENCY DIAL 2 SWEEP RATE CONTROL 3 SWEEP WIDTH CONTROL 5 SYMMETRY CONTROL 3 TTL CMOS CONTROL 0 DC OFFSET CONTROLS AMPLITUDE CONTROL 8 MAIN OUTPUT BNC 9 TTL CMOS OUTPUT BNC 20 VCF INPUT BNC 2 INTERNAL EXTERNAL SWITCH 22 TILT STAND Controls output fine frequency in the selected range On Off Switch for the Internal Sweep Generator Adjusts Sweep Rate of the Internal Sweep Generator Pull out to adjust the Sweep Magnitude Adjust Symmetry of Output Waveform 1 1 to 10 1 with Push Pull Switch On Selects TTL or CMOS Mode Out for CMOS Level Control In for TTL Level Adds Positive or Negative DC Component to the Output Signal Adjusts Output Level from 0 to 20 dB 50 Ohm Impedence TTL CMOS Level Output Voltage Controlled Frequency Input Permits External Sweep Frequency Control Sweep Rate Control should be off when applying external voltage at to this BNC IN External Frequency Counter OUT Internal Frequency Counter Pull Out to Adjust Tilt 11
18. ime period on oscilloscope and convert to freguency if reguired The repetition rate includes the full cycle both the pulse width and rest time for pulses the rise time and fall time for ramp waves D Repetition rate can be measured accurately and easily as a freguency or time period with a freguency counter E Pulse width also can be measured on a freguency counter but only with the SYMMETRY control set off before the pulse waveform is stretched Pulse width equals one half the time period of the square wave If the counter is not equipped for period measurement calculate the frequency which is equivalent to the desired pulse width and measure the frequency of the waveform 1 DESIRED PULSE WIDTH x 2 DESIRED FREQUENCY 17 3 5 TTL CMOS OUTPUT 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 the accidental application of too high an amplitude or incorrect DC offset which might damage semiconductors Another advantage is the extremely fast rise time and fall time of signal To use the TTL CMOS output connect a cable from TTL CMOS BNC on the Front panel to the point at which it is desired to inject the signal TL CMOS output may be used in several modes of operation See examples to follow A Using the square
19. o minimize ringing Keep the cables as short as possible F To set output amplitude to a specific level measure peak to peak amplitude on an oscilloscope 15 3 4 Use as a Pulse Generator In a symmetrical square wave sine wave or triangle wave the positive and negative transitions are of egual time duration or 1 1 ratio This condition is present when the SYMMETRY control is off When the SYMMETRY control is pulled and rotated the positive transition can be stretched in relation to the negative transition up to at least 10 1 ratio Sguare waves can be stretched into rectangular waves or pulses triangle waves can be stretched into distorted wave shape called a skewed sine wave FIG 5 illustrates the types of waveforms possible and includes a summary of control settings used to obtain the desired waveform 1 Procedure A Setup generator as described for function generator operation Display the output of generator on an oscilloscope B Select the desired type of waveform with the Function Switches Press the sguare wave button for pulses triangle button for ramp waves or sine wave button for skewed sine waves Adjust Period Of Shorter Duration With Freg Controls Pulse Sguare Ramp pM L3 Triangle N HD Skewed Sine me S Adjust Period Of Longer Duration With gt Symmetry Controls K TTL SYNC Figure 5 PULSE RAMP AND SKEWED SINE WAVE GENERATI
20. odel 4005 as described for internally controlled sweep generator operation however turn the SWEEP WIDTH control to OFF Apply the sweep voltage with no DC component at the VCF Input BNC Set the FREQ dial to the highest frequency to be swept and apply a negative going ramp voltage 3 11 Use as an External Frequency Counter This instrument can be used as a counter by pushing in the INT EXT selection switch A EXT COUNT IN BNC Accepts external frequency input B COUNTER DISPLAY Input frequency is displayed with high resolution on the 6 Digit 7 Segment display D mHz Hz KHz MHz INDICATOR mHz Hz KHz MHz indicators amp decimal points display a maximum 50 MHz of external frequency E FREQUENCY RANGES W X 1 21 F LOW PASS FILTER If necessary engage the LPF low pass filter switch This will route the input through a low pass filter 3 dB point of approximately 100 KHZ prior to passing through to the frequency counter This helps eliminate counting errors in low frequency measurements by minimizing effects of high frequency noise present on the input CAUTION 1 APPLICATION OF INPUT VOLTAGES HIGHER THAN THE LIMITS LISTED IN THE SPECIFICATIONS SECTION MAY DAMAGE THE COUNTER BEFORE APPLYING ANY SIGNAL TO THE INPUTS MAKE CERTAIN THAT IT DOES NOT EXCEED THESE SPECIFIED MAXIMUMS 2 FREOUENCY COUNTER GROUND POINTS ARE CONNECTED DIRECTLY TO EARTH GROUND ALWAYS CONNECT FREOUENCY COUNTER GROUND ONLY TO GROUND POINTS IN THE CIR
21. or all ranges 18 HIGHEST FREQ FREQ DEVIATION FOR EACH RANGE OBTAINABLE HZ 0 1 VOLT VCF IN CHANGE Hz Freguency Deviation vs VCF IN Voltage B For an example it is assumed that we wish to generate a 455 KHz signal with FM deviation of 15 KHz 30 KHz swing The 500k range will be used to obtain the 455 KHz carrier with the FREO dial set to 4 55 The highest frequency obtainable in this range is 500kHz One percent of 500kHz is 5 KHz Our reguirement of 30 KHz deviation is 6 times greater than 5 KHz deviation produced by a 0 1 volt VCF IN swing thus we will use 6 times as much peak to peak voltage swing or 0 6 V For Instance desired deviation 1 deviation 30 KHz X 0 1 V required VCF IN BKHz x 0 1 6 x 0 1V 0 6V C Remember that the value of VCF IN signal is the peak to peak amplitude 3 7 External Control of VCF Within a given range the FREQ dial setting normally controls the output frequency of generator However applying a voltage at the VCF IN BNC on the front panel also may control it There are three basic possible modes of external VCF control as detailed below A Applying an AC voltage produces FM modulation previously described in the Use as FM Signal Generator paragraph B Applying a specific fixed DC voltage will produce a specific output freguency described in following Programmed Frequency Selection paragraph C Applying a ramp voltage or other type waveform if desired provides e
22. r of this manual 3 9 Use as a Sweep Generator 1 Procedure A Set up the Model 4005 for function generator operation B Select the highest freguency to be swept with the RANGE switch and the lowest freguency to be swept with the FREQ dial C Adjust amount of sweep with the sweep rate control D Adjust repetition rate of sweep with the sweep rate control 2 Considerations The sweep generator will sweep upward from that point However it will sweep upward only to the set range limit highest frequency to which the dial can tune on the selected range Therefore a low dial setting is required to obtain a sweep covering a wide frequency range The 0 05 setting must be used to obtain the maximum sweep width of 100 1 highest frequency sweep is 100 times that of lowest frequency swept If a high dial setting and high SWEEP WIDTH setting are used simultaneously the generator will sweep to the range limit and ceases operation for a portion of the sweep cycle effectively clipping the sweep Of course if only a small frequency band is to be swept a low dial setting is not important In fact it may be easier to set to the desired frequencies if the dial setting is 0 5 or higher 3 10 Use as an Externally Controlled Sweep Generator A ramp voltage or any other type waveform desired can be used for externally controlled sweep generator operations O to 10 volt swing will sweep frequencies over a 100 1 ratio with dial set to 0 05 Set the M
23. ternations or repairs Warranty is void if the serial number is altered defaced or removed Global Specialties LLC shall not be liable for any consequential damages 25 Model Number Date Purchased Service Information Prior to sending any unit in for warranty or non warranty repair the user must obtain a Return Merchandise Authorization RMA number from the factory Please use the contact information below for the most convenient method of contact After receipt of the RMA return all merchandise to Global Specialties LLC with pre paid shipping Warranty Service Please return the product in the original packaging with proof of purchase to the below address Clearly state in writing the performance problem and return any leads connectors and accessories that you are using with the device Non Warranty Service Return the product in the original packaging to the below address Clearly state in writing the performance problem and return any leads connectors and accessories that you are using with the device For the most current repair charges contact the factory before shipping the product Global Specialties LLC 22820 Savi Ranch Parkway Yorba Linda CA 92887 Phone 800 572 1028 Facsimile 714 921 6422 Email service globalspecialties com Include with the instrument your complete return shipping address contact name phone number and description of problem 26 AR GW Global 22820 Savi Ranch Parkway
24. 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 The CMOS Level Control potentiometer out position provides CMOS level output from 5V to 15V Variable and Continuously To adjust the TTL CMOS output level rotate the potentiometer switch and observe the TTL or CMOS output Push the potentiometer in for TTL or out tor CMOS 3 6 Use as FM Signal Generator 1 Procedure A Set up eguipment as described for function generator operation Use the freguency and amplitude controls to set the carrier to the desired freguency and amplitude B Connect an AC modulating signal with no DC component to the VCF IN BNC on the front panel of the generator C Adjust amplitude of the AC modulating signal for the desired frequency deviation 2 Considerations A The approximate freguency deviation for a given VCF IN signal can be determined as follows The 0 1 V change at the VCF IN BNC produces a freguency change of 1 of the highest freguency obtainable on a given range For example the highest freguency obtainable on the 500 K range is 500 KHz One percent of 500 KHz equals 5KHz therefore a 0 1 V change at the VCF IN BNC will deviate the output freguency 5KHz on the 500K range The following table summarizes the freguency deviation versus VCF IN voltage f
25. xternally controlled sweep generator operation described in the Use as Externally Controlled Sweep Generator paragraph The following considerations apply to all modes of operation involving external control of the VCF voltage controlled freguency A The output freguency of the generator is determined by the voltage applied to the VCF 19 B This voltage is first established by the setting of the FREQ dial Any voltage input drives the VCF to a HIGHER FREQUENCY However the VCF can never be driven beyond its range limits the highest and lowest frequencies that can be attained with the dial on a given range B With the FREQ dial set at its minimum 0 05 and O volts at the VCF in BNC the generator s output frequency is at the lower limit of the selected range Increasing the voltage to 10 volts drives the generator frequency to the upper limit of the range Between 0 and 10 Volts the generator output frequency is proportional to the VCF IN voltage The VCF IN voltage can be correlated to equivalent dial settings as given in the table below VCF voltage Equivalent dial Setting 0 1 2 3 4 D 6 8 9 10 Correlation Between the VCF IN Voltage and the Eguivalent Freguency Dial Setting dial set to 0 05 C The FREQ dial is usually set to 0 05 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 effe
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