Scientific SMG2000 Series User Manual Download Page 147

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Scientific

User manual SMG2000

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Figure 3-16 Generate a DSB-AM Modulation Waveform

Summary of Contents for SMG2000 Series

Page 1: ...User Manual Function Arbitrary Waveform Generator SMG2042 SMG2082 SMG2122 ...

Page 2: ... this manual may be photocopied reproduced or translated without any prior written consent Information in this manual supersedes all corresponding previous released material Scientific continues to improve products and reserves rights to amend part or all of the specifications procedures equipment at any time without notice Rev 1 00 0116 ...

Page 3: ...on Function Keys 21 2 Front Panel Operations 22 2 1 To Set Sine Signal 23 2 2 To Set Square Signal 28 2 3 To Set Ramp Signal 30 2 4 To Set Pulse Signal 32 2 5 To Set Noise Signal 36 2 6 To Set DC Signal 39 2 7 To Set Arbitrary Signal 40 2 8 To Set Harmonic 51 2 9 To Set Modulation Function 54 2 9 1 AM 55 2 9 2 DSB AM 58 2 9 3 FM 59 2 9 4 PM 61 2 9 5 FSK 63 2 9 6 ASK 65 2 9 7 PSK 66 2 9 8 PWM 67 2 ...

Page 4: ...enerate a Pulse Waveform 124 3 5 Example 5 Generate a Noise 126 3 6 Example 6 Generate a DC Waveform 127 3 7 Example 7 Generate a Linear Sweep Waveform 128 3 8 Example 8 Generate a Burst Waveform 130 3 9 Example 9 Generate an AM Modulation Waveform 132 3 10 Example 10 Generate a FM Modulation Waveform 134 3 11 Example 11 Generate a PM Modulation Waveform 136 3 12 Example 12 Generate a FSK Modulati...

Page 5: ...unded correctly before connecting its input or output terminals Connect the signal wire correctly The potential of the signal wire ground is equal to the earth so do not connect the signal wire to a high voltage Do not touch the exposed contacts or components Observe all terminal ratings To avoid fire or electric shock please observe all ratings and sign instruction on the instrument Before connec...

Page 6: ...njury or hazard that may immediately happen WARNING Indicates an injury or hazard that may not immediately happen CAUTION Indicates that a potential damage to the instrument or other property might occur Symbols used on the instrument Symbols may appear on the instrument Hazardous Protective Warning Chassis Power Voltage Earth Ground Ground Switch ...

Page 7: ...ltitude of complex applications Key Features Dual channel 120MHz maximum bandwidth 20Vpp maximum output amplitude high fidelity output with 80dB dynamic range High performance sampling system with 1 2GSa s sampling rate and 16 bit vertical resolution No detail in your waveforms will be lost Innovative TrueArb technology based on a point by point architecture supports any 8pts 8Mpts Arb waveform wi...

Page 8: ...nual SMG2000 1 Quick Start This chapter covers the following topics Handle Adjustment The Front Rear Panel To Set a Waveform To Set Modulation Sweep Burst To Turn On Off Output To Use Digital Input To Use Common Function Keys ...

Page 9: ...00 9 150 1 1 Handle Adjustment To adjust the handle position of SMG2000 please grip the handle by the sides and pull it outward Then make the handle rotate to the desired position Figure 1 1 Viewing Position and Carrying Position ...

Page 10: ...on and description for the operation and functions of the front rear panel Front Panel SMG2000 has a clear and simple front panel which includes 4 3 inch touch screen menu softkeys numeric keyboard knob function keys arrow keys and channel control area etc Touch Screen Display Numeric Keyboard Knob USB Host Arrow Keys Power Key Menu Softkeys Function Keys Channel Control Figure 1 2 Front Panel of ...

Page 11: ...provides multiple interfaces including Counter 10MHz In Out Aux In Out LAN USB Device Earth Terminal and AC Power Supply Input 10 MHz Clock Input Output Aux Counter In Out Earth Terminal LAN Interface USB Device AC Power Supply Input Figure 1 3 Rear Panel of SMG2000 ...

Page 12: ...splayed may vary depending on the function selected The entire screen of the SMG2000 is a touch screen You can use your figure or touch pen to control the instrument Most functions and selections can be chosen using the touch screen in a similar manner to the front panel keys and knob Channel 1 Information Channel 2 Information Waveform Display Waveform Parameters Channel Parameters Menu Figure 1 ...

Page 13: ... with the waveform selection settings Figure 1 5 Waveform Selections 1 Press Waveforms key and then press Sine softkey The generator can generate sine signal with frequency from 1µHz to 120MHz By setting Frequency Period Amplitude High level Offset Low level and Phase a sine signal with different parameters can be generated Figure 1 6 Sine Display Interface ...

Page 14: ... Low level Phase and DutyCycle a square signal with different parameters can be generated Figure 1 7 Square Display Interface 3 Press Waveforms key and then press Ramp softkey The generator can generate ramp signal with frequency from 1µHz to 1MHz and variable symmetry By setting Frequency Period Amplitude High level Offset Low level Phase and Symmetry a ramp signal with different parameters can b...

Page 15: ...requency Period Amplitude High level Offset Low level PulWidth Duty Rise Fall and Delay a pulse signal with different parameters can be generated Figure 1 9 Pulse Display Interface 5 Press Waveforms key and then press Noise softkey The generator can generate noise with bandwidth from 20MHz to 120MHz By setting Stdev Mean and Bandwidth noise with different parameters can be generated Figure 1 10 No...

Page 16: ...1 DC Display Interface 7 Press Waveforms key and then press Page 1 2 last press the Arb softkey The generator can generate repeatable arbitrary waveform signals with length from 8 to 8M points and frequency up to 20MHz By setting Frequency Period Amplitude High level Offset Low level Phase and Arb Mode an arbitrary signal with different parameters can be generated Figure 1 12 Arbitrary Waveform Di...

Page 17: ...rm can be changed by modifying the parameters such as Type Source AM Depth AM Freq Shape etc SMG2000 can modulate waveforms using AM FM PM ASK FSK PSK PWM and DSB AM etc Pulse waveforms can only be modulated using PWM Noise and DC cannot be modulated Figure 1 14 Modulation Display Interface 2 Press Sweep the Sweep function will be enabled Sine square ramp and arbitrary waveforms support sweep In s...

Page 18: ...Display Interface 3 Press Burst the Burst function will be enabled Burst signal for sine square ramp pulse or arbitrary waveforms can be generated Start Phase ranges from 0 to 360 and Burst Period ranges from 1µs to 1000s Figure 1 16 Burst Waveform Display Interface ...

Page 19: ...e of the operation panel which are used to control output of the two channels Choose a channel and press the corresponding Output key the key backlight will be lighted and the output will be turned on Press the Output key again the key backlight will be extinguished and the output will be turned off Figure 1 17 Output Keys ...

Page 20: ...with the digital input function Figure 1 18 Front Panel Digital Input 1 The numeric keyboard is used to set the parameters value 2 The knob is used to increase clockwise or decrease counterclockwise the current digit when setting parameters 3 When using knob to set parameters the arrow keys are used to select the digit to be modified When using numeric keyboard to set parameters the left arrow key...

Page 21: ...t the parameters of basic waveforms directly 2 The Utility key is used to set the auxiliary system function such as output configurations interface setting system setting information performing the instrument self test and reading the calibration information etc 3 The Store Recall key is used to store and recall waveform data and configuration information 4 The Waveforms key is used to select basi...

Page 22: ...tions you are suggested to read chapter one Quick Start again This chapter covers the following topics To Set Sine Signal To Set Square Signal To Set Ramp Signal To Set Pulse Signal To Set Noise Signal To Set DC Signal To Set Arbitrary Signal To Set Harmonic To Set Modulation Function To Set Sweep Function To Set Burst Function To Store and Recall To Set Utility Function You are suggested to read ...

Page 23: ...select Frequency The frequency parameter area is highlighted in the parameter display window and users can set the frequency value here Figure 2 1 Sine Parameters Display Interface Table2 1 Menu Explanations of Sine Waveform Function menu Settings Explanations Frequency Period Set the signal frequency or period The current parameter will be switched at a second press Amplitude HighLevel Set the si...

Page 24: ...g the function if the current value is valid for the new waveform it will be used sequentially If you want to set the period for the waveform press Frequency Period key again to switch to the period parameter the current operation is displayed in inverse color 2 Input the desired frequency Use the numeric keyboard to input the parameter value directly and press the corresponding key to select the ...

Page 25: ...hen changing the function if the current value is valid for the new waveform it will be used sequentially If you want to set the waveform by high level press the Amplitude HighLevel key again to switch into the high level parameter the current operation is displayed in inverse color 2 Input the desired amplitude Use the numeric keyboard to input the parameter value directly and press the correspon...

Page 26: ...st power on When changing the function if the current value is valid for the new waveform it will be used sequentially If you want to set the waveform by low level press the Offset LowLevel key again to switch into the low level parameter the current operation is displayed in inverse color 2 Input the desired offset Use the numeric keyboard to input the parameter value directly and press the corre...

Page 27: ...last power on When changing the function if the current value is valid for the new waveform it will be used sequentially 2 Input the desired phase Use the numeric keyboard to input the parameter value directly and press the corresponding key to select the parameter unit Or you can use the arrow keys to select the digit you want to edit and then use the knob to change its value Figure 2 5 Setting t...

Page 28: ...the parameter display window and users can set the duty cycle value here Figure 2 6 Square Parameters Display Interface Table2 2 Menu Explanations of Square Waveform Function Menu Settings Explanation Frequency Period Set the signal frequency or period The current parameter will be switched at a second press Amplitude HighLevel Set the signal amplitude or high level The current parameter will be s...

Page 29: ...ered on is the default value or the set value of last power on When changing the function if the current value is valid for the new waveform it will be used sequentially 2 Input the desired Duty Cycle Use the numeric keyboard to input the parameter value directly and press the corresponding key to select the parameter unit Or you can use the arrow keys to select the digit you want to edit and then...

Page 30: ...hlighted in the parameter display window and users can set the symmetry value here Figure 2 8 Ramp Parameters Display Interface Table2 3 Menu Explanations of Ramp Waveform Function Menu Settings Explanation Frequency Period Set the signal frequency or period The current parameter will be switched at a second press Amplitude HighLevel Set the signal amplitude or high level The current parameter wil...

Page 31: ...n When changing the function if the current value is valid for the new waveform it will be used sequentially 2 Input the desired Symmetry Use the numeric keyboard to input the parameter value directly and press the corresponding key to select the parameter unit Or you can use the arrow keys to select the digit you want to edit and then use the knob to change its value The generator will change the...

Page 32: ... 2 10 Pulse Parameters Display Interface Table 2 4 Menu Explanations of Pulse Waveform Function Menu Settings Explanation Frequency Period Set the signal frequency or period The current parameter will be switched at a second press Amplitude HighLevel Set the signal amplitude or high level The current parameter will be switched at a second press Offset LowLevel Set the signal offset or low level Th...

Page 33: ...be automatically changed 1 Press Waveforms Pulse PulWidth to set the pulse width The pulse width shown on the screen when the instrument is powered on is the default value or the set value of last power on When changing the function if the current value is valid for the new waveform it will be used sequentially If you want to set the waveform by duty press the PulWidth Duty key again to switch int...

Page 34: ...d by the currently specified pulse width limit Users can set rise edge and fall edge independently 1 Press Waveforms Pulse Rise to set the rise edge The rise edge shown on the screen when the instrument is powered on is the default value or the set value of last power on When changing the function if the current value is valid for the new waveform it will be used sequentially If you want to set th...

Page 35: ...ress the corresponding key to select the parameter unit Or you can use the arrow keys to select the digit you want to edit and then use the knob to change its value The generator will change the waveform immediately Figure 2 12 Setting the Rise Edge Note The methods of setting other parameters of pulse signal are similar to sine signal ...

Page 36: ...ft key menu select Stdev The stdev parameter area is highlighted in the parameter display window and users can set the stdev value here Noise is non periodic signal which has no frequency or period Figure 2 13 Noise Parameters Display Interface Table 2 5 Menu Explanations of Noise Function Menu Settings Explanation BandSet Turn on off the bandwidth setting Stdev Setting the stdev for noise wavefor...

Page 37: ...r you can use the arrow keys to select the digit you want to edit and then use the knob to change its value Figure 2 14 Setting the Stdev To Set the Mean 1 Press Waveforms Noise Mean to set the mean The mean shown on the screen when the instrument is powered on is the default value or the set value of last power on When changing the function if the current value is valid for the new waveform it wi...

Page 38: ...lue or the set value of last power on When changing the function if the current value is valid for the new waveform it will be used sequentially 2 Input the desired bandwidth Use the numeric keyboard to input the parameter value directly and press the corresponding key to select the parameter unit Or you can use the arrow keys to select the digit you want to edit and then use the knob to change it...

Page 39: ...DC Signal Press Waveforms Page 1 2 DC to enter the following interface Please note that there is an offset parameter at the middle of the screen Figure 2 17 DC Setting Interface Note The method of setting offset of DC signal is similar to sine signal ...

Page 40: ... 2 18 Arb Parameters Display Interface DDS Table 2 6 Menu Explanations of Arb Waveform Page 1 2 Function menu Settings Explanations Frequency Period Set the signal frequency or period The current parameter will be switched at a second press Amplitude HighLevel Set the signal amplitude or high level The current parameter will be switched at a second press Offset LowLevel Set the signal offset or lo...

Page 41: ...t the signal sampling rate or frequency The current parameter will be switched at a second press Amplitude HighLevel Set the signal amplitude or high level The current parameter will be switched at a second press Offset LowLevel Set the signal offset or low level The current parameter will be switched at a second press Phase Set the phase of the signal In TrueArb output mode users can set the samp...

Page 42: ...ally If you want to set the frequency for the waveform press SRate Frequency key again to switch to the frequency parameter the current operation is displayed in inverse color 2 Input the desired sampling rate Use the numeric keyboard to input the parameter value directly and press the corresponding key to select the parameter unit Or you can use the arrow keys to select the digit you want to edit...

Page 43: ...er the following interface as shown in Figure 2 21 Figure 2 21 Built in Arbitrary Waveforms Press Common Math Engine Win Trigo Square or Others to switch to the desired category each category has one or more sub categories Press the corresponding menu key to switch to the desired sub category the selected sub category in the sub category bar is highlighted then rotate the knob or click the touch s...

Page 44: ...e Ver waveform ExpFall ExpFall function ExpRise ExpRise function LogFall LogFall function LogRise LogRise function Sqrt Sqrt function Root3 Root3 function X 2 X2 function X 3 X3 function Airy Airy function Besselj Bessel I function Bessely Bessel II function Dirichlet Dirichlet function Erf Error function Erfc Complementary error function ErfcInv Inverted complementary error function ErfInv Invert...

Page 45: ...l Quake Analog quake waveform Chirp Chirp signal TwoTone TwoTone signal SNR SNR signal AmpALT Gain oscillation curve AttALT Attenuation oscillation curve RoundHalf RoundHalf Waveform RoundsPM RoundsPM Waveform BlaseiWave Time velocity curve of explosive oscillation DampedOsc Time displacement curve of damped oscillation SwingOsc Kinetic energy time curve of swing oscillation Discharge Discharge cu...

Page 46: ...ackman window GaussiWin GaussiWin window Triangle Triangle window Fejer window BlackmanH BlackmanH window Bartlett Hann Bartlett Hann window Bartlett Bartlett window BarthannWin Modified Bartlett Hann window BohmanWin BohmanWin window ChebWin ChebWin window FlattopWin Flat top weighted window ParzenWin ParzenWin window TaylorWin TaylorWin window Window TukeyWin TukeyWin tapered cosine window Tan T...

Page 47: ...y08 Square waveform with 8 duty SquareDuty10 Square waveform with 10 duty SquareDuty12 Square waveform with 12 duty SquareDuty14 Square waveform with 14 duty SquareDuty16 Square waveform with 16 duty SquareDuty18 Square waveform with 18 duty SquareDuty20 Square waveform with 20 duty SquareDuty22 Square waveform with 22 duty SquareDuty24 Square waveform with 24 duty SquareDuty26 Square waveform wit...

Page 48: ...areDuty70 Square waveform with 70 duty SquareDuty72 Square waveform with 72 duty SquareDuty74 Square waveform with 74 duty SquareDuty76 Square waveform with 76 duty SquareDuty78 Square waveform with 78 duty SquareDuty80 Square waveform with 80 duty SquareDuty82 Square waveform with 82 duty SquareDuty84 Square waveform with 84 duty SquareDuty86 Square waveform with 86 duty SquareDuty88 Square wavef...

Page 49: ...diogram 15 LFPulse Waveform of the low frequency pulse electrotherapy Tens1 Waveform 1 of the nerve stimulation electrotherapy Tens2 Waveform 2 of the nerve stimulation electrotherapy Tens3 Waveform 3 of the nerve stimulation electrotherapy AM Sectional sine AM signal FM Sectional sine FM signal PFM Sectional pulse FM signal PM Sectional sine PM signal l Mod PWM Sectional PWM signal Butterworth Bu...

Page 50: ...se Waveforms Page 1 2 Arb Arb Type Stored Waveforms to enter the following interface as shown in Figure 2 22 Figure 2 22 Stored Waveform Display Interface Rotate the knob or touch the screen to choose the desired waveform Then press Recall to recall the corresponding waveform ...

Page 51: ...orm frequency A1 is fundamental waveform amplitude φ1 is fundamental waveform phase The frequencies of the other components called harmonic are all integral multiples of the fundamental waveform Components whose frequencies are odd multiples of the fundamental waveform frequency are called odd harmonics and components whose frequencies are even multiples of the fundamental waveform frequency are c...

Page 52: ...onics 2 Press Odd the instrument will output fundamental waveform and odd harmonics 3 Press All the instrument will output fundamental waveform and all the user defined orders of harmonics To Set the Harmonic Order After entering the harmonic setting menu press Order the use the numeric keyboard or knob to input the desired value The range is limited by the maximum output frequency of the instrume...

Page 53: ... the pop up menu The units available are Vpp mVpp and dBc To Select the Harmonic Phase After entering the harmonic setting menu press Harmonic Phase to set the harmonic phase of each order 1 Press Order to select the sequence number of the harmonic to be set 2 Press Harmonic Phase to set the phase of the harmonic selected Use the arrow keys and knob to change the value Or use the numeric keyboard ...

Page 54: ...he source internal external modulating frequency frequency deviation modulating waveform and carrier In PM users can set the source internal external phase deviation modulating frequency modulating waveform and carrier In ASK users can set the source internal external key frequency and carrier In FSK users can set the source internal external key frequency hop frequency and carrier In PSK users ca...

Page 55: ...igure 2 24 Figure 2 24 Setting Interface of AM Modulation Table 2 10 Menu Explanations of the AM Parameters Function Menu Settings Explanation Type AM Amplitude modulation Internal The source is internal Source External The source is external Use the Aux In Out connector at the rear panel AM Depth Set the modulation depth Sine Square Triangle UpRamp DnRamp Noise Shape Arb Choose the modulating wav...

Page 56: ...or accepts external modulating signal from the Aux In Out connector at the rear panel At this time the amplitude of the modulated waveform is controlled by the signal level on the connector For example if the modulation depth is set to 100 the output amplitude will be the maximum when the modulating signal is 6V and the minimum when the modulating signal is 6V Key Points How to realize a modulatio...

Page 57: ...e same with the set one For an external source the depth of AM is controlled by the voltage level on the connector connected to the Aux In Out 6V correspond to 100 depth When external modulation source is selected this menu is hidden To Set Modulation Frequency When internal modulation source is selected press AM Freq to highlight the parameter then use the numeric keyboard or arrow keys and knob ...

Page 58: ...s Function Menu Settings Explanation Type DSB AM DSB Amplitude modulation Internal The source is internal Source External The source is external Use the Aux In Out connector at the rear panel DSB Freq Set the modulating waveform frequency Frequency range 1mHz 1MHz internal source only Sine Square Triangle UpRamp DnRamp Noise Shape Arb Choose the modulating waveform Note The methods of setting the ...

Page 59: ...Figure 2 26 Figure 2 26 Setting Interface of FM Modulation Table 2 12 Menu Explanations of the FM Parameters Function Menu Settings Explanation Type FM Frequency modulation Internal The source is internal Source External The source is external Use the Aux In Out connector at the rear panel Freq Dev Set the frequency deviation Sine Square Triangle UpRamp DnRamp Noise Shape Arb Choose the modulating...

Page 60: ... keyboard or arrow keys and knob to input the desired value The deviation should be equal to or less than the carrier frequency The sum of the deviation and the carrier frequency should be equal to or less than maximum frequency of the selected carrier waveform Note The methods of setting other parameters of FM are similar to AM ...

Page 61: ...own in Figure 2 27 Figure 2 27 Setting Interface of PM Modulation Table 2 13 Menu Explanations of the PM Parameters Function Menu Settings Explanation Type PM Phase modulation Internal The source is internal Source External The source is external Use the Aux In Out connector at the rear panel Phase Dev Phase deviation ranges from 0 360 Sine Square Triangle UpRamp DnRamp Noise Shape Arb Choose the ...

Page 62: ...r and then use the numeric keyboard or arrow keys and knob to input the desired value Use the numeric keyboard or arrow keys and knob to input the desired value The range of phase deviation is from 0 to 360 and the default value is 100 Note The methods of setting other parameters of PM are similar to AM ...

Page 63: ...ameters Function Menu Settings Explanation Type FSK Frequency shift keying modulation Internal The source is internal Source External The source is external Use the Aux In Out connector at the rear panel Key Freq Set the frequency at which the output frequency shifts between the carrier frequency and the hop frequency internal modulation only 1mHz 1MHz Hop Freq Set the hop frequency To Set Key Fre...

Page 64: ...The range of hop frequency depends on the carrier currently selected Press Hop Freq to highlight the parameter and then use the numeric keyboard or arrow keys and knob to input the desired value Sine 1µHz 120MHz Square 1µHz 25MHz Ramp 1µHz 1MHz Arb 1µHz 20MHz Note The methods of setting other parameters of FSK are similar to AM In addition the external modulating signal of FSK must be Square which...

Page 65: ...u Explanations of the ASK Parameters Function Menu Settings Explanation Type ASK Amplitude shift keying modulation Internal The source is internal Source External The source is external Use the Aux In Out connector at the rear panel Key Freq Set the frequency at which the output amplitude shifts between the carrier amplitude and zero internal modulation only 1mHz 1MHz Note The methods of setting t...

Page 66: ...planations of the PSK Parameters Function Menu Settings Explanation Type PSK Phase shift keying modulation Internal The source is internal Source External The source is external Use the Aux In Out connector at the rear panel Key Freq Set the frequency at which the output phase shifts between the carrier phase and 180 internal modulation only 1mHz 1MHz Positive Polarity Negative Set the modulating ...

Page 67: ...f PWM Modulation Table 2 17 Menu Explanations of the PWM Parameters Function Menu Settings Explanation Type PWM Pulse width modulation The carrier is pulse Internal The source is internal Source External The source is external Use the Aux In Out connector at the rear panel Width Dev Set the width deviation Duty Dev Set the duty deviation Sine Square Triangle UpRamp DnRamp Noise Shape Arb Choose th...

Page 68: ... the desired value as shown in the Figure 2 32 Figure 2 32 Width Deviation Setting Interface The width deviation cannot exceed the current pulse width The width deviation is limited by the minimum pulse width and current edge time setting Duty Deviation represents the variation of the modulated waveform duty relative to the original duty Press Duty Dev to highlight the parameter and then use the n...

Page 69: ...annot exceed the current pulse duty The duty deviation is limited by the minimum duty and current edge time setting Duty deviation and width deviation are correlative Once a parameter is changed the other will be automatically changed Note The methods of setting other parameters of PWM are similar to AM ...

Page 70: ...anations of Sweep Page 1 2 Function Menu Settings Explanation Sweep time Set the time span of the sweep in which the frequency changes from the start frequency to stop frequency Start Freq Mid Freq Set the start frequency of the sweep Set the center frequency of the sweep Stop Freq Freq Span Set the stop frequency of the sweep Set the frequency span of the sweep Source Internal Choose internal sou...

Page 71: ...lanations of Sweep Page 2 2 Sweep Frequency Use start freq and stop freq or center freq and freq span to set the range of the frequency Press the key again to switch between each other Start Frequency and Stop Frequency Start Frequency and Stop Frequency are the lower and upper limits of the frequency for sweep Start Frequency Stop Frequency Choose Direction Up the generator will sweep from start ...

Page 72: ...ay of several Hertz per second Choose Sweep Page 1 2 Type Linear there is a straight line displayed on the waveform on the screen indicating that the output frequency varies linearly Figure 2 36 Linear Sweep Log Sweep In log sweep the output frequency of the instrument varies in a logarithmic fashion that is the output frequency changes in the way of decade per second Choose Sweep Page 1 2 Type Lo...

Page 73: ...n Out connector at the rear panel will output the trigger signal 2 External Trigger Choose Source External the generator accepts the trigger signal inputted from the Aux In Out connector at the rear panel when external trigger is selected A sweep will be generated once the connector gets a CMOS pulse with specified polarity To set the CMOS pulse polarity choose Edge to select Up or Down 3 Manual T...

Page 74: ...rst type trigger source and carrier Burst Type Trigger Source Carrier N Cycle Internal External Manual Sine Square Ramp Pulse Arbitrary Infinite External Manual Sine Square Ramp Pulse Arbitrary Gated Internal External Sine Square Ramp Pulse Noise Arbitrary N Cycle In N Cycle mode the generator will output waveform with specified number of cycles after receiving the trigger signal Waveforms that su...

Page 75: ... mode Cycles Infinite Set the number of the bursts in N Cycle Set the number of the bursts in N Cycle to be infinite Start Phase Set the start phase of the burst Burst Period Set the burst period Internal Choose internal source as a trigger External Choose external source as a trigger Use the Aux In Out connector at the rear panel Source Manual Trigger a burst by manual Page 1 2 Enter the next pag...

Page 76: ...t On Enable trigger out Page 2 2 Return to the previous page Infinite In infinite mode the cycle number of the waveform is set as an infinite value The generator outputs a continuous waveform after receiving the trigger signal Waveforms that support infinite mode include sine square ramp pulse and arbitrary Press Burst NCycle Infinite and set the trigger source to external or manual The screen wil...

Page 77: ...gnal level When the gated signal is true the generator outputs a continuous waveform When the gated signal is false the generator first completes the output of the current period and then stops Waveforms that support gated burst include sine square ramp pulse noise and arbitrary Press Burst Gated to enter the following interface Figure 2 41 Gated Burst Interface ...

Page 78: ...d the default setting is 0 For an Arbitrary Waveform 0 is the first waveform point Burst Period Burst Period is only available when the trigger source is internal It is defined as the time from the start of a burst to the start of the next one Choose Burst Period and use the numeric keyboard or arrow keys and knob to input the desired value Burst Period 0 99µs carrier period burst number If the cu...

Page 79: ...rnal trigger is selected Choose Trig Out as Up or Down the Aux In Out connector at the rear panel will output trigger signal with specified edge 2 External Trigger Choose Source External the generator accepts the trigger signal inputted from the Aux In Out connector at the rear panel when external trigger is selected A burst will be generated once the connector gets a CMOS pulse with specified pol...

Page 80: ...lowing interface Figure 2 42 Store Recall Interface Table 2 24 Menu Explanations of Save and Recall Function Menu Settings Explanation State The setting of the generator File Type Data Arbitrary waveform file Browse View the current directory Save Save the waveform to the specified path Recall Recall the waveform or setting information in the specific position of the memory Delete Delete the selec...

Page 81: ... the firmware version by U Disk When the generator detects a USB storage device the screen will show the driver letter USB Device 0 and display a prompt message USB device connected as shown in Figure 2 43 After removing the U Disk the screen will display a prompt message USB device removed And USB Device 0 in the storage menu will disappear Figure 2 43 Storage System Note SMG2000 can only identif...

Page 82: ...call File Type to select the desired file type Available file types are State File and Data File State File Store the instrument state in internal or external memory in xml format The state file stored includes waveform parameters and modulation sweep burst parameters of two channels and utility parameters Data File SMG2000 could recall the data files in csv or dat format from the external memory ...

Page 83: ...dulation parameters and other utility settings used To save the instrument state the procedures are given as followed 1 Choose the file type to store Press Store Recall File Type State and choose state as the storage type 2 Choose the location of the file Choose a desired location by rotating the knob or clicking the corresponding location on the touch screen 3 Name the file Press Save to enter th...

Page 84: ...hen choose Select to display the character selected in the filename area Delete the character Use the left and right arrow keys to move the cursor in the file name Then choose Delete to delete the corresponding character 4 Save the file After finishing inputting filename press Save The generator will save the file under the currently selected directory with the specified filename To Recall State F...

Page 85: ... message when the file is read successfully To Delete File To delete the instrument state or arbitrary waveform data the procedures are given as followed 1 Choose the file Rotate the knob or click the touch screen to select the file you want to delete 2 Delete the file Choose Delete the generator will display prompt message Delete the file Then press Done the generator will delete the currently se...

Page 86: ...Copy Coupling Set the track channel coupling or channel copy function Page 1 2 Enter the next page 2 13 To Set Utility Function With the Utility function you can set the parameters of the generator such as Sync Interface System Setting Self Test and Frequency Counter etc Press Utility to enter the utility menu as shown in Figure 2 45 and Figure 2 46 Figure 2 45 Utility Setup Interface Page 1 2 Tab...

Page 87: ...aces Sync Set the sync output Internal CLKSource External Choose the system clock source Help View the help information OverVoltage Protection Turn on off the overvoltage protection function Page 2 2 Return to the previous page Figure 2 46 Utility Setup Interface Page 2 2 Table 2 27 Menu Explanations of Utility Page2 2 ...

Page 88: ...s of System Setup Page 1 2 Function Menu Settings Explanation Number format Set the number format English Language Chinese Set the language Default All the settings return to default when power on PowerOn Last All the settings return to the setting of last power on Set to Default Set all the settings to default On Open the beeper Beeper Off Close the beeper Page 1 2 Enter the next page ...

Page 89: ...lanation 1min 5min 15min 30min 1hour 2hour 5hour Enable or disable the screen saver ScrnSvr Off Disable the screen saver System Info View the system information Firmware Update Update the firmware by the U disk Bandwidth Update Update the bandwidth of the generator Done Save the current settings and return to the Utility menu Page 2 2 Return to the previous page ...

Page 90: ...he Separator Separator Space Use Space as the separator Done Save the current settings and return to the System menu According to the different choices of the decimal point and the separator the format can have various forms 2 Language Setup Default language is English 3 Power On Choose the setting when the generator is powered on Two choices are available the default setting and the last Once sel...

Page 91: ...ttings of the system are as followed Table 2 31 Factory Default Setting Output Default Function Sine Wave Frequency 1kHz Amplitude Offset 4Vpp 0Vdc Phase 0 Load High Z Modulation Default Carrier 1kHz Sine Wave Modulating 100Hz Sine Wave AM Depth 100 FM Deviation 100Hz ASK Key Frequency 100Hz FSK Key Frequency 1MHz FSK Hop Frequency 100Hz PSK Key Frequency 100Hz PM Phase Deviation 100 PWM Width Dev...

Page 92: ... is On 6 Screen Saver Enable or disable screen saver Press Utility System Page 1 2 ScrnSvr to select On or Off and the default is Off Screen saver will be on if no action is taken within the time that you have selected Click the touch screen or press any key to resume 7 System Info Select the System Info option of the utility menu to view the generator s system information including startup times ...

Page 93: ...Utility Menu 3 Press Page option key to enter the second page of Utility Menu 4 Press the Firmware Update option key 5 Select the update file and choose Recall to update the system software 6 After updating is finished restart the generator Note Don t cut off the power during the generator is being updated 9 Updating Bandwidth If you need to update the bandwidth of the generator you are suggested ...

Page 94: ...ction Menu Settings Explanation Up Cursor upward to select Down Cursor downward to select Select Select the current character from the virtual soft keyboard Delete Delete the current character of the license Save Save the license Cancel Return to the Utility menu Note SMG2000 supports 40MHz 80MHz and 120 MHz bandwidth for now ...

Page 95: ...interface Figure 2 54 Test Cal function Menu Table 2 33 Menu Explanations of Test Cal Setting Function Menu Settings Explain SelfTest Perform a system self test TouchCal Do a touch screen calibration Cancel Return to the Utility menu Self Test Press Utility Test Cal SelfTest to enter the following menu ...

Page 96: ...est program LEDTest Run key indicator lights test program BoardTest Run hardware circuit self test program Cancel Return to the Test Cal menu 1 ScrTest Select ScrTest to enter the screen test interface The prompt message Please press 7 key to continue press 8 key to exit is displayed You could press the 7 key for test and observe if there is any serious color deviation bad pixel or display error ...

Page 97: ...le shapes represent the front panel keys The round between two arrows represents the knob Test all keys and knob and you should also verify that all the backlight keys illuminate correctly Figure 2 57 Key Test Interface The corresponding area of tested keys or knob would display in blue color The top of the screen displays Please press 8 key three times to exit ...

Page 98: ...nel keys The prompt message Please press 7 Key to continue press 8 Key to exit is displayed You could press the 7 key continuously for testing when a key is lighted the corresponding area on the screen would display in blue color Figure 2 58 LED Test Interface 4 Board Test Select BoardTest to enter the following interface Figure 2 59 Board Test Interface ...

Page 99: ...tility Test Cal TouchCal to enter the following interface Figure 2 60 Touch Adjust Interface According to the message click the red circle on the upper left corner upper right corner lower left corner and lower right corner of the screen in sequence After touch calibration is done the system will display the following tip Then press any key or touch the screen to exit the current interface Figure ...

Page 100: ...ce Table 2 35 Menu Explanations of Frequency Counter Function Menu Settings Explanation Off Open the counter State On Close the counter Frequency Measured frequency Period Measured period PWidth Measured positive width NWidth Measured negative width RefFreq Set the reference frequency System will calculate the deviation between the measured frequency and the reference frequency automatically TrigL...

Page 101: ...efault Done Save the current settings and return to the previous menu 1 To Select the Parameters to be measured The frequency counter of SMG2000 could measure parameters including frequency period duty positive pulse width and negative pulse width 2 Reference Frequency The generator is able to calculate the frequency deviation automatically according to the current reference frequency 3 Trigger Le...

Page 102: ...r DC The default is AC 5 HFR High Frequency Rejection can be used to filter out the high frequency components and improve the measurement accuracy in low frequency signal measurement Press HFR to enable or disable this function The default is Off Enable High Frequency Rejection when low frequency signal with lower than 250kHz frequency is measured to filter out the high frequency noise interferenc...

Page 103: ...nce If the actual load does not match the set one the displayed voltage will not equal the real voltage This function is used to match the displayed voltage with the expected one Steps for setting the load Press Utility Output Setup Load to set the output load The load parameter shown on the down bottom is the default setting when the power is on or the pre set load value High Impedance displayed ...

Page 104: ... following figure Note The Sync signal related to the waveform is not inverted when the waveform is inverted To Set EqPhase Press Utility Output Setup EqPhase to align the phases of CH1 and CH2 Choosing the menu will re configure two channels and enable the generator to output with specified frequency and start phase For two signals whose frequencies are the same or in multiple this operation will...

Page 105: ...following interface Figure 2 65 Channel Copy Interface Table 2 37 Menu Explanations of Channel Copy Function Menu Settings Explanation CH1 CH2 Copy all parameters and states of CH1 to CH2 CH2 CH1 Copy all parameters and states of CH2 to CH1 Done Perform the current selection and return to the Utility menu Cancel Give up the current selection and return to the Utility menu Note Channel coupling or ...

Page 106: ...plitude deviation ratio or phase deviation ratio relative to the base channel Press Utility CH Copy Coupling Channel Coupling to enter the following interface Figure 2 66 Channel Coupling Interface Frequency Coupling 1 To Enable Frequency Coupling Function Press FreqCoup to turn frequency coupling On or Off The default is Off 2 To Select Frequency Coupling Mode Press FreqMode to choose Deviation o...

Page 107: ...upling Mode Press PhaseMode to choose Deviation or Ratio and then use the numeric keyboard or knob and arrow keys to input the desired value Deviation the phase deviation between CH1 and CH2 The parameter relations are shown below PhaseCH2 PhaseCH1 PhaseDev Ratio the phase ratio of CH1 and CH2 The parameter relations are shown below PhaseCH2 PhaseCH1 PhaseRatio Key Points 1 Channel coupling is onl...

Page 108: ...ted to the same values or states automatically At this point the dual channels can output the same signal Choose Utility CH Copy Coupling Track to enable or disable the track function When the track function is enabled channel copy and coupling functions are disabled the user interface is switched to CH1 and can t be switched to CH2 as shown in the following figure Figure 2 67 Track Interface ...

Page 109: ...Menu Explanations of Interface Function Menu Settings Explanation GPIB Set the GPIB address On Turn on LAN LAN State Off Turn off LAN LAN Setup Set the IP address subnet mask and gateway Done Save the current settings and return to the Utility menu SMG2000 can be controlled remotely via the following two ways 1 User defined programming Users can program and control the instrument by using the SCPI...

Page 110: ...ent Automation Explorer of NI and choose the corresponding resource name Then click Open VISA Test Panel to turn on the remote command control panel through which you can send commands and read data Remote Control via GPIB Each device connected to GPIB interface must have a unique address The default value is 18 and it ranges from 1 to 30 The selected address is stored in non volatile memory 1 Con...

Page 111: ...the current setting Figure 2 69 GPIB Setting Interface 4 Communicate with PC remotely Open Measurement Automation Explorer of NI After adding the GPIB device successfully choose the corresponding resource name Then click Open VISA Test Panel to turn on the remote command control panel through which you can send commands and read data Remote Control via LAN SMG2000 can communicate with PC through L...

Page 112: ...s IP Address and use the arrow keys and numeric keyboard or knob to enter your desired IP address The setting is stored in non volatile memory and will be loaded automatically when the generator is powered on at the next time 2 To Set Subnet Mask The format of subnet mask is nnn nnn nnn nnn and each nnn ranges from 0 to 255 You are recommended to acquire an available subnet mask from your network ...

Page 113: ...ateways of PC and generator must be the same and the IP addresses of them must be within the same network segment If the generator is connected to the LAN of your PC please contact with your network administrator to get an available IP address For details refer to the TCP IP protocol 4 DHCP Configuration Mode In DHCP mode the DHCP server in the current network assigns LAN parameters e g IP address...

Page 114: ...terface Table 2 39 Menu Explanations of Sync Output Function Menu Settings Explanation Off Close the sync output State On Open the sync output CH1 Set the sync signal of CH1 Channel CH2 Set the sync signal of CH2 Done Save the current settings and return to the Utility menu Cancel Give up the current settings and return to the Utility menu Sync Signals of Different Waveforms Basic Waveform and Arb...

Page 115: ...with 500ns pulse width For AM FM PM and PWM the frequency of the sync signal is the modulating frequency For ASK and FSK the frequency of the sync signal is the key frequency 2 When external modulation is selected there is no sync signal output for the Aux In Out connector on the rear panel is used to input external modulating signal Sweep and Burst Waveform When Sweep or Burst function is turned ...

Page 116: ...external clock source would be displayed and the clock source would be switched to Internal Sync methods for two or more instruments Synchronization between two instruments Connect the 10MHz In Out connector of generator A using internal clock to the 10MHz In Out connector of generator B using external clock and set the output frequencies of A and B as a same value to realize synchronization Synch...

Page 117: ... enter the following interface Figure 2 72 Help Menu Table 2 40 Help Menu Explanations Function Menu Settings Explanation UP Cursor upward to select Down Cursor downward to select Select Read the currently selected help information Cancel Exit the built in help system There are 10 options of the help list You can use the knob operation menus or touch the corresponding location on the screen to sel...

Page 118: ... CH2 will take effect once any of the following conditions is met When overvoltage protection occurs a message will be displayed and the output is disabled The absolute value of input voltage is higher than 11V 0 5V when the amplitude of the generator is higher than or equal to 3 2Vpp or the DC offset is higher than or equal to 2VDC The absolute value of input voltage is higher than 4V 0 5V when t...

Page 119: ...nerate a Ramp Waveform Example 4 Generate a Pulse Waveform Example 5 Generate a Noise Example 6 Generate a DC Waveform Example 7 Generate a Linear Sweep Waveform Example 8 Generate a Burst Waveform Example 9 Generate an AM Modulation Waveform Example 10 Generate a FM Modulation Waveform Example 11 Generate a PM Modulation Waveform Example 12 Generate a FSK Modulation Waveform Example 13 Generate a...

Page 120: ... unit MHz The frequency is set to 1MHz Set the Amplitude 1 Press Amplitude HighLevel to choose Amplitude which will display in blue color 2 Input 5 from the keyboard and choose the unit Vpp The amplitude is set to 5Vpp Set the Offset 1 Press Offset LowLevel to choose Offset which will display in blue color 2 Input 1 from the keyboard and choose the unit Vdc The offset is set to 1Vdc When the frequ...

Page 121: ...HighLevel to choose Amplitude which will display in blue color 2 Input 2 from the keyboard and choose the unit Vpp The amplitude is set to 2Vpp Set the Offset 1 Press Offset LowLevel to choose Offset which will display in blue color 2 Input 0 from the keyboard and choose the unit Vdc The offset is set to 0Vdc Set the DutyCycle 1 Press DutyCycle to choose DutyCycle which will display in blue color ...

Page 122: ...hoose Amplitude which will display in blue color 2 Input 100 from the keyboard and choose the unit mVpp The amplitude is set to 100mVpp Set the Offset 1 Press Offset LowLevel to choose Offset which will display in blue color 2 Input 20 from the keyboard and choose the unit mVdc The offset is set to 20mVdc Set the Phase 1 Press Phase to choose Phase which will display in blue color 2 Input 45 from ...

Page 123: ...Scientific User manual SMG2000 123 150 When the period amplitude offset phase and symmetry are set the waveform generated is shown in Figure 3 3 Figure 3 3 Generate a Ramp Waveform ...

Page 124: ... choose the HighLevel which will display in blue color 2 Input 5 from the keyboard and choose the unit V The high level is set to 5V Set the LowLevel 1 Press Offset LowLevel and choose the LowLevel which will display in blue color 2 Input 1 from the keyboard and choose the unit V The low level is set to 1V Set the PulWidth 1 Press PulWidth Duty and choose PulWidth which will display in blue color ...

Page 125: ...Scientific User manual SMG2000 125 150 When the frequency high level low level pulse width and delay are set the waveform generated is shown in Figure 3 4 Figure 3 4 Generate a Pulse Waveform ...

Page 126: ...hoose Stdev which will display in blue color 2 Input 0 5 from the keyboard and choose the unit V The stdev is set to 0 5 V Set the Mean 1 Press Mean to choose Mean which will display in blue color 2 Input 1 from the keyboard and choose the unit 1 The mean is set to 1V When the stdev and mean are set the noise generated is shown in Figure 3 5 Figure 3 5 Generate a Noise ...

Page 127: ...DC waveform 1 Press Waveforms Page 1 2 DC to choose the DC waveform Set the Offset 1 Press Offset and choose Offset which will display in blue color 2 Input 3 from the keyboard and choose the unit Vdc The DC offset is set to 3Vdc When the DC offset is set the waveform generated is shown in Figure 3 6 Figure 3 6 Generate a DC Waveform ...

Page 128: ... in blue color Input 5 from the keyboard and choose the unit Vpp to set the amplitude to 5Vpp 2 Press Offset LowLevel to choose Offset which will display in blue color Input 0 from the keyboard and choose the unit Vdc to set the offset to 0Vdc Set the sweep time Press Sweep Page 1 2 Sweep Time input 1 from the keyboard and choose the unit s to set the sweep time to 1s Set the start frequency Press...

Page 129: ...Scientific User manual SMG2000 129 150 When all parameters above are set the linear sweep waveform generated is shown in Figure 3 7 Figure 3 7 Generate a Linear Sweep Waveform ...

Page 130: ...equency to 10kHz 2 Press Amplitude HighLevel to choose Amplitude which will display in blue color Input 4 from the keyboard and choose the unit Vpp to set the amplitude to 4Vpp 3 Press Offset LowLevel to choose Offset which will display in blue color Input 0 from the keyboard and choose the unit Vdc to set the offset to 0Vdc Set the burst mode Press Burst NCycle choose N Cycle Mode The default set...

Page 131: ... choose the unit Cycle to set the burst cycle to 5 Set the delay Press Page 1 2 to choose Delay and input 100 from the keyboard and choose the unit µs to set the delay to 100µs When all parameters above are set the waveform generated is shown in Figure 3 8 Figure 3 8 Generate a N Cycle Burst Waveform ...

Page 132: ...and choose Amplitude which will display in blue color Input 1 from the keyboard and choose the unit Vpp to set the amplitude to 1Vpp 4 Press Offset LowLevel and choose Offset which will display in blue color Input 0 from the keyboard and choose the unit Vdc to set the offset to 0Vdc Set the modulation type AM and parameters 1 Press Mod Type AM choose AM Please notice that the message shown on the ...

Page 133: ...Scientific User manual SMG2000 133 150 Figure 3 9 Generate an AM Modulation Waveform ...

Page 134: ...vel and choose Amplitude which will display in blue color Input 1 from the keyboard and choose the unit Vpp to set the amplitude to 1Vpp 4 Press Offset LowLevel and choose Offset which will display in blue color Input 0 from the keyboard and choose the unit Vdc to set the offset to 0Vdc Set the modulation type FM and parameters 1 Press Mod Type FM choose FM Please notice that the message shown on ...

Page 135: ...Scientific User manual SMG2000 135 150 Figure 3 10 Generate a FM Modulation Waveform ...

Page 136: ...and choose Amplitude which will display in blue color Input 5 from the keyboard and choose the unit Vpp to set the amplitude to 5Vpp 4 Press Offset LowLevel and choose Offset which will display in blue color Input 0 from the keyboard and choose the unit Vdc to set the offset to 0Vdc Set the modulation type PM and parameters 1 Press Mod Type PM choose PM Please notice that the message shown on the ...

Page 137: ...Scientific User manual SMG2000 137 150 Figure 3 11 Generate a PM Modulation Waveform ...

Page 138: ...e HighLevel and choose Amplitude which will display in blue color Input 5 from the keyboard and choose the unit Vpp to set the amplitude to 5Vpp 4 Press Offset LowLevel and choose Offset which will display in blue color Input 0 from the keyboard and choose the unit Vdc to set the offset to 0Vdc Set the modulation type FSK and parameters 1 Press Mod Type FSK choose FSK Please notice that the messag...

Page 139: ...Scientific User manual SMG2000 139 150 Figure 3 12 Generate a FSK Modulation Waveform ...

Page 140: ...et the frequency to 5kHz 3 Press Amplitude HighLevel and choose Amplitude which will display in blue color Input 5 from the keyboard and choose the unit Vpp to set the amplitude to 5Vpp 4 Press Offset LowLevel and choose Offset which will display in blue color Input 0 from the keyboard and choose the unit Vdc to set the offset to 0Vdc Set the modulation type ASK and parameters 1 Press Mod Type ASK...

Page 141: ...Scientific User manual SMG2000 141 150 Figure 3 13 Figure 3 13 Generate an ASK Modulation Waveform ...

Page 142: ... 3 Press Amplitude HighLevel and choose Amplitude which will display in blue color Input 5 from the keyboard and choose the unit Vpp to set the amplitude to 5Vpp 4 Press Offset LowLevel and choose Offset which will display in blue color Input 0 from the keyboard and choose the unit Vdc to set the offset to 0Vdc Set the modulation type PSK and parameters 1 Press Mod Type Page 1 2 PSK choose PSK Ple...

Page 143: ...Scientific User manual SMG2000 143 150 Figure 3 14 Generate a PSK Modulation Waveform ...

Page 144: ...m the keyboard and choose the unit Vpp to set the amplitude to 5Vpp 4 Press Offset LowLevel and choose Offset which will display in blue color Input 0 from the keyboard and choose the unit Vdc to set the offset to 0Vdc 5 Press PulWidth and choose PulWidth which will display in blue color Input 40 from the keyboard and choose the unit us to set the PulWidth to 40us Set the modulation type PWM and p...

Page 145: ...Scientific User manual SMG2000 145 150 Figure 3 15 Generate a PWM Modulation Waveform ...

Page 146: ...the frequency to 2kHz 3 Press Amplitude HighLevel and choose Amplitude which will display in blue color Input 4 from the keyboard and choose the unit Vpp to set the amplitude to 4Vpp 4 Press Offset LowLevel and choose Offset which will display in blue color Input 0 from the keyboard and choose the unit Vdc to set the offset to 0Vdc Set the modulation type DSB AM and parameters 1 Press Mod Type DSB...

Page 147: ...Scientific User manual SMG2000 147 150 Figure 3 16 Generate a DSB AM Modulation Waveform ...

Page 148: ...wer sources and clean it with a mild detergent and water Make sure the instrument is completely dry before reconnecting it to a power source To clean the exterior surface perform the following steps 1 Remove loose dust on the outside of the instrument with a lint free cloth When cleaning the touch screen be careful to avoid scratching the transparent plastic protective screen 2 Use a soft cloth da...

Page 149: ...r the inspections above restart the generator 4 If the generator still doesn t work after checking please contact with SCIENTIFIC 2 If there is no waveform output after setting the parameters please do as the following steps 1 Check whether the BNC cable has connected with the output port or not 2 Check whether the output keys have been turned on or not 3 If the generator still doesn t work after ...

Page 150: ...o us giving full details of the fault noticed model number and serial number 2 After receipt of your letter our service department will advise you whether it is necessary to send the instrument back to us for repairs or the adjustment is possible in your premises 3 Dispatch the instrument to us only on the receipt of our advice at our factory address securely packed in original packing duly insure...

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