MADELL TECHNOLOGY CORPORATION 1. Main Features 2
Contents
1. 2 awg an oscillating waveform will be generated in this program include lt stdio h gt include lt stdlib h gt include lt conio h gt include lt math h gt Define data length define AWGMEMORYLENGTH 8192 define variables unsigned char awgwaveform int p 0 subroutine to save data void savedatatofile FILE fp unsigned char data void main void long i FILE xfp save to file fp fopen 2 awg w open data file 2 awg write data header fprintf fp d n AWGMEMORYLENGTH data heaher for i 0 1 lt 9 it fill remaining 9 header sequences fprintf fp d n 0 equation computation 8bits value 0 255 save in awg format for i 0 i lt AWGMEMORYLENGTH i awgwaveform 128 127 sin 2 M_PIi AWGMEMORYLENGTH 16 xexp float i AWGMEMORYLENGTH 8 savedatatofile fp awgwaveform fclose fp close data filex i subroutine to save data in awg format void savedatatofile FILE fp unsigned char data fprintf fp d data ptt if p gt 32 32 bytes in a line seperated by p 0 fprintf fp n2. 100uHz lt 100Hz 2 4 Attenuation of Sine 502 load 1Vp p output lt 20KHz 60dBc 20KHz 1MHz 50dBc 1MHz 10MHz 40dBc 1OMHz 20MHz 30dBc 2 5 Signals 502 load 1Vp p output Square Rising Falling edges lt 25ns Overshoot lt 5 Nonsymtricity 2 20ns Duty 100kHz 20 80 1MHz 30 70 Triangle ramps Linearity 1KHz lt 1 2 6 Output Amplitude No4load 2mVp p 20Vp _p 50Q load 1lmVp p 10Vp p Output impudence 50Q Adjustment resolution 5 Flatness of sine waveform 10 Offset 100 100 of peak value 2 7 Pulse 50Qoutput port at ASK modulation Sync output Level TTL Pulse width 10us lt tw lt 100s Pulse precision 0 5us Gap l10us lt ts lt 100s 2 8 Sweeping Range 0 1Hz 20Mhz Minimum step 0 1Hz Rate 10ms 100s Trig internal external single 2 9 FSK ASK Pulse width gap 10us 100s Trig internal external single 2 10 Modulation Internal modulation Carrier waveform default waveforms Carrier frequency 1lmHz 20MHz Modulation waveform default waveforms Modulation frequency 100mHz 10kHz Modulation frequency stability 50ppm Modulation depth 0 120 External modulation Input impedance 1kQ AM at 1Vp p sine 0 4Vp p external modulation reaches 100 depth FM Carrier waveform internal Carrier frequency 0 1Hz 20Mhz Modulation waveform internal Modulation frequency 100mHz 10kHz Modulation frequency stability 50ppm Frequency shift ra
3. change output frequency to 1000Hz in the range of 0 001 20000000 VOLT100 change amplitude to 100mV in the range of 1 10000 DUTY50 changes duty to 50 in the range of 20 80 OFFSETO changes offset to zero in the range of 100 100 Maximum instruction length 15 characters A return sign must follow the instruction Its ASCO code is 10 or represented by n in C language The function generator may freeze if now doing so There should be some time gap between two instructions 3 8 Trig In sweeping FSK and ASK modes in addition to be trigged internally single or external trigs can also be used When the Trig key is pressed the function generator enters into single or external trig mode The LCD shows trig in the lower right corner When in MODE mode the MODE sign changes to tMODE Single Trig In single trig mode every press of the TRIG key will cause the function generator output a sweeping FSK or ASK pulses Pulse width is decided by the tw parameter In FSK mode the function generate outputs continuous f2 signal After trig it outputs a single pulse signal with width of tw and frequency fl and ouputs f2 signal afterwards In single trig mode the SYNC OUTPUT will send out a TTL pulse synchronized with the signal This helps external circuits or an oscilloscope to capture the output pulse External Trig In external trig mode the function generato
4. wa modulation waveform OK confirm selection Similar to linear and log sweeping 500 frequency points are used to implement frequency modulation Internal AM MODE internal AM fo fm dp wa OK fo carrier frequency fm modulation frequency dp modulation depth wa modulation waveform OK confirm In this mode fo should be greater than fm External AM MODE external AM lt inam extam No setting menu in this mode The output signal amplitude will be reduced to half to allow enough modulation dynamic range The carrier frequency is selected with the Freq key 3 7 Configuration When the Config key is pressed the LCD shows RS 232 9600 N 8 1 The function generator enters in the RS 232 remote control mode The RS 232 is fixed at 9600 bits no checking bits 8 data bits 1 stop bit The following instructions can be used to send commands to and get status from the function generator through the serial port WAVE SIN output sine waveform WAVE SQUARE output square waveform WAVE TRIANGLE output triangle waveform WAVE RAMPUP output up ramp waveform WAVE RAMPDOWN down ramp WAVE NOISE output noise WAVE SINX X output SIN x x WAVE EXPUP output up exponential WAVE EXDOWN output down exponential WAVE AWGI output user waveform AWGI1 WAVE AWGz2 output user waveform AWG2 WAVE AWG3 output user waveform AWG3 WAVE AWG4 output user waveform AWG4 FREQ1000
5. entered numbers Cancel button can be used to terminate the frequency input mode 3 3 Amplitude When the Ampl key is pressed the LCD shows AMPLITUDE 100 mV this is the default value The amplitude value is the peak to peak value at load of 50 ohm Maximum amplitude is 10V and minimum 1 mV 3 4 Duty When the duty key is pressed the LCD shows SQUARE DUTY 50 The upper and lower duty limits are 80 and 20 respectively When the frequency is faster then 1MHz the duty range will reduce gradually 3 5 Offset When the Offset key is pressed the LCD shows DC OFFSET 0 The upper and lower offset limits are 100 and 100 of the peak value respectively 3 6 Mode When the Mode key is pressed the first line of LCD shows MODE no modulation the second line shows no lin log fsk gt There are total 9 modulation status no modulation linear sweep log sweep FSK ASK internal FM internal AM and external AM Press the blue buttons underneath the LCD to select the corresponding modulation mode press gt to show modes in the next page press lt the get back to the previous page After getting into a modulation mode press the corresponding mode key again will get into parameter setting mode For example when in linear modulation mode press Lin key again will show f1 f2 tw ts OK Linear sweeping MODE linear sweep f f2 tw ts OK f s
6. MADELL TECHNOLOGY CORPORATION DDS SYNTHESIZED WY32020 FUNCTION ARBITRARY SIGNAL GENERATOR 1 Main Features Features of WY32020 DDS technology is used for high stability Frequency range 0 01Hz to 20Mhz Sweeping FSK and FM settings are all digitized no phase jump when frequency changes Single manual trig external voltage level or edge trig for sweeping FSK and ASK TTL output can be used as TTL clocks minimum pulse width 10u s time precision 0 5u s and aximum to 100s Communicate with PC through RS 232 serial port Arbitrary waveform generation AWG capability AWG AWG software is included with the purchase Packing List WY32020 box 5092 terminator mamimnenn o porer cable inseme Alligator cabl sHs s2s5seS F1 BNG a r Ste Saal Users mantial s gt S ss s S SeS2 tS 5 Software email __ 1 2 Specifications 2 1 In system waveforms Sine square triangle up ramp down ramp white noise SIN X X up exponential down exponential 2 2 Arbitrary waveforms Length 8K 8192 points Resolution 8bits 1 sign 7 magnitude Sample rate 10MSa S Four 8K points waveforms 2 3 Frequency response Sine 1lmHz 20MHz Square 2Mhz Other waveforms 1mHz 100KHz Highest resolution 100 uHz or 8 bits Long term stability 50ppm 00 400 Short term stability lppm after a short warm up time Resolution 0 05Hz gt 100Hz
7. data file size the remain 9 are reserved for later us It is recommended to fill the reserved sequences with 0 User defined waveform data is stored from lines of 11 to the end The length of the data is define by the first sequence in the file header Every line should have 32 characters 66 99 separated by Because waveform data can be generated from different devices or software while the function generator has fixed 8 bits resolution data normalization should be performed by user software All data should be in the range of 0255 4 5 Menu functions and operation New This will clean the screen and reset all settings to default ones Open Save Save As Print There are standard Windows functions Undo This will reset the editing area size and zoom in Mark The software can be used to cut copy paste adding noise smooth zoom in and other functions Before using any of those functions the editing area should be defined Press the Mark submenu when a waveform is shown in the graphics area a vertical line will be shown in the left side of the graphics window This line can be moved with the mouse This mark line will disappear if the right mouse button is clicked Drag the mark line to somewhere and click the right mouse button will define the left side of the editing area The edit area can be defined by move the mouse to the right and click left mouse button again The editing area will be inside the new
8. l issue errors Options Decide to use which com port from 1 to 4 4 6 Generate Waveforms from Math Equations Waveforms can also be generated form oscilloscopes or data loggers Since they have different storage formats data have to be normalized and saved in usr format This section talks about waveform generation from math equations Actually any programming language can be used to do this Here we only talks about how to use QBASIC and C languages to generate waveforms A small user program is needed to perform this work BASIC Example Program Awgfile bas awg will hold a sine modulation waveform AWGMEMORYLENGTH 8192 define variables DIM AWGWAVEFORM AS INTEGER open file to save OPEN 1 awg FOR OUTPUT AS 1 file name gt write file header 10 PRINT 1 AWGMEMORYLENGTH character seuqnece FOR N 0 TO 8 PRINT 1 0 NEXT gt write waveform data P 0 TEMP equation computation data is 8bits value 0 255 FOR N 0 TO AWGMEMORYLENGTH 1 AWGWAVEFORM 128 127 x 5 x 1 9 x COS 2x3 14159264 x N AWGMEMORYLENGTH 2 x SIN 2 x 3 14159264 N AWGMEMORYLENGTH 32 save data in awg format TEMP TEMP STR AWGWAVEFORM P P 1 IF P 32 THEN 32 characters in every line separated by a sign PRINT 1 TEMP P 0 TEMP END IF NEXT PRINT 1 TEMP fill the remain characters end CLOSE 1 close file C Example Program awgfile c
9. ly defined white area Exit editing mode by click on the Mark menu again Cut This will cut the waveform inside the editing area Noise This function adds pseudo white noise to the current waveform It is not available now Smooth This function smoothes the current waveform It is not available now Zoom Zoom into the marked waveform area Click on Undo to exit Trace A cross hair mark will show the x and y position on the waveform Freehand Line Using these functions to draw arbitrary waveforms It can be used to draw spikes and pulses Mouse will be limited inside the graphics area in these modes In Freehand mode a waveform is constructed by mouse the mouse while press down the left button In Line mode a waveform is constructed by individual straight lines Every click of the left mouse button will finish the current line and start a new one Click on the left mouse button above or bellow the waveform will add spikes at that point Click the right mouse button to exit these modes Waveform Download The generated waveform needs to be downloaded to the function generator flash memory The waveform can be downloaded into any of the four wavel wave4 storage areas Modify the Delay time to suit fast or slow computers The default delay of 10000 can fit most situations The size of the storage area is 8K or 8192 bytes for every waveform The downloaded waveform data must be 8192 bytes Otherwise the software wil
10. nge 0 lHz 20MHz 3 Menu and Operations This function generator has a back light double line LCD display keypads and a dial four BNC connectors The OUTPUT BNC connector is the signal output connector output impedance is 50 ohm The SYNC OUTPUT connector is for TTL level output It indicates signal timing This signal can be used as external trig signal on an oscilloscope The AM IN BNC connector is for external modulation signals The TRIG IN BNC connector is for external TTL trig mode The dial is multi functional Its value corresponds to the blinking number on the LCD display 3 1 Wave Key When the Wave key is pressed the LCD shows WAVEFORM sin and sin blinks The waveform can be selected by turning the dial The sequence of the waveforms is sine square triangle rampup rampdown noise pseudo white noise sin x x expup expdown wavel wave2 wave3 waved All sin and square waveforms can reach 20Mhz All others can reach 1 0 OkHz 3 2 Freq When the Freq key is pressed the LCD shows fo 1 0000000 kHz This is the default frequency Turn the dial to change the digit that is blinking Frequency can also be entered directly with the number keypad First press the Enter key all frequency digits disappear Enter the required frequency with the numbered keypads Press Enter again to confirm the entered new frequency The backward key can be used to delete the newly
11. r is trigged by the TRIG IN BNC input TTL signal In sweeping mode every TTL rising edge will generator a sweeping with width of tw External trig period much be greater than tw FSK and ASK are controlled by the input TTL signal level In FSK mode the function generator outputs fl in low 0 voltage outputs f2 in high 1 voltage In ASK mode it outputs the carrier signal in low 0 voltage outputs nothing in high 1 voltage Press the Cancel key to exit trig mode 4 Arbitrary Waveform Editing 4 1 General The arbitrary waveform editing software is need to generator user defined waveforms 4 2 Software Interface The software can be operated under Windows interface Menus and fast key icons are standard Windows arrangement for easy and fast operation 4 3 Mouse Standard windows mouse pads operation 4 4 File Format Two file formats machine format public format Machine format is used to construct and store waveform data Public format is used to translate waveform data obtained from other devices or software The extension of machine format file is awg and the extension of public format files is usr The editing software read files differently according to the extensions The storage format of machine files is reserved and not open to the public Storage of Public files is based on character sequences the first 10 sequences are file headers Sequences should be saved in lines The first sequence represents the
12. tart frequency f2 stop frequency tw sweeping on time ts sweeping off time OK confirm selection WY32020 implements frequency sweeping by selecting 500 frequencies between the start and stop frequency Sweeping can be positive or negative It is positive sweeping when the stop frequency is greater than the stop frequency Sweeping can be linear and log The 500 frequency points are divided linearly equal distance at linear sweeping It takes a few seconds for the CPU to compute the sweeping frequency points Log sweeping MODE log sweep fi f2 tw ts OK fi start frequency f2 stop frequency tw sweeping on time ts sweeping off time OK confirm In log sweeping mode the higher the frequency the faster the frequency changes FSK MODE FSK fi f2 tw ts OK fi frequency 1 f2 frequency 2 tw frequency 1 on time ts frequency 2 on time OK confirm selection In FSK mode frequency shifts between fl and f2 modulation signal is square waveform tw and ts can be 100s to 10us ASK MODE ASK fo tw ts OK fo carrier frequency tw carrier on time ts carrier off time OK confirm selection Modulation signal controls the on and off of the carrier frequency in ASK Tw and ts can be 100s to 10us In ASK mode the SYNC OUTPUT BNC will output corresponding pulse signals Internal FM MODE internal FM fo fm fd wa OK fo carrier frequency fm modulation frequency fd max frequency shift
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