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PeakTech

®

4065

Operation manual

DDS Arbitrary

Waveform Generator

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Summary of Contents for 4065

Page 1: ...PeakTech 4065 Operation manual DDS Arbitrary Waveform Generator ...

Page 2: ...ny resistance measurements Check test leads and probes for faulty insulation or bare wires before connection to the equipment To avoid electric shock do not operate this product in wet or damp conditions Conduct measuring works only in dry clothing and rubber shoes i e on isolating mats Comply with the warning labels and other info on the equipment The measurement instrument is not to be to operat...

Page 3: ...ulation characteristics output FM AM PM PWM FSK signal Frequency sweeping be of the function of output linearity or logarithm frequency sweeping signal start point and stop point can be set arbitrarily Burst characteristics output burst signal of which the number has been set External trigger external trigger is available under frequency sweeping FSK modulation and burst function Frequency measure...

Page 4: ... in to turn on the generator The generator now is initializing itself and obtaining the default parameters outputting sine waveform under continuous working state with frequency and amplitude of the signal displayed Warning In order to ensure the security of the operator use triple core socket outlet with grounding conductor 3 2 Front panel 1 Power switch 2 Function keys 3 CHA output 4 CHB output ...

Page 5: ...0 1 2 3 4 5 6 7 8 9 keys Digits inputting key key Point inputting key key Minus inputting key press this key to input minus under offset and waveform edition option Press this key to enable or disable the key tone circularly under other options key Move the cursor left delete the input when inputting digits key Move the cursor right Freq Period select frequency and period circularly disable calibr...

Page 6: ...ctly to execute the functions marked on themselves when inputting digits with numeric keys press these five keys to select the unit of the inputting and end the digits inputting at the same time Options list of menu Menu Option CHA continuous Amplitude attenuation output mode state and waveform storage state recall CHB continuous Amplitude attenuation output mode AB phase difference version number...

Page 7: ...Duty key press 2 0 Other waveform selection select exponent waveform sequence number 5 see waveform sequence number table Press Shift Waveform key press 5 Output mode selection the phase of output signal is the opposite of the one of sync signal Press Menu key select Mode option and press 1 3 6 2 CHB continuous CHB continuous CHB outputs stable and continuous signal with continuous Press Shift CHA...

Page 8: ...rce option and press 1 Return back to continuous function Under phase modulation press PM key to return back to continuous function 3 6 6 Pulse width modulation function width modulation function Press PWM key to output pulse width modulation signal Modulation frequency setting set modulation frequency as 1Hz Press Menu key select Mod_f option and press 1 Hz Pulse width deviation setting set pulse...

Page 9: ...press 1 Single trigger setting trigger sweeping once Press Shift Trig keys to trigger sweeping once Return back to continuous function Under frequency sweeping press Sweep key to return back to continuous function 3 6 9 Burst function Burst function set continuous as 1 kHz Press Burst key to output burst signal Repeated period setting set repeated period as 5ms Press Menu key select Period option ...

Page 10: ...e address and y as the quantized data to store them into waveform memorizer DDS uses phase adding technique to control the address of waveform memorizer Add a phase increment on the present result of phase accumulator in each sampling clock period so as to change the output frequency value by change phase increment According to the address from the phase accumulator take the quantized data out fro...

Page 11: ...ea which do not work yet and could be deleted by pressing or select this option again to input right one if it is a wrong input but these must happen before pressing an unit key End the digits input and make them valid by pressing an unit key For any input by pressing the point key and the units the generator will display this input in its own certain form Such as the generator displays 1 50000 kH...

Page 12: ...of the signal The output signal makes a momentary hop when the attenuation changes which is not welcome in some operations but the generator has fixed attenuation function to avoid this circumstance Input attenuation values of 0dB 20dB 40dB and 60dB with the numeric keys input 80dB to select auto attenuation Users may use the adjusting knob as well the attenuation changes to next one for every ste...

Page 13: ... common waveforms the waveform character of other waveforms is Arb The waveform sequence numbers of 16 kinds of waveforms are as listed as below Waveform sequence numbers list Sequence number Waveform Sequence number Waveform Sequence number Waveform 00 Sine 06 Logarithm 12 User defined 2 01 Square 07 Sinc 13 User defined 3 02 Ramp 08 Half round 14 User defined 4 03 Pulse 09 Cardiogram 15 User def...

Page 14: ...e set in advance It is meaningless to set phase difference when the frequencies of CHA and CHB are different The settings of other parameters of CHB is the same as the one of CHA Below contents give detail explanations of FM AM PM PWM FSK frequency sweeping burst and arbitrary waveform functions which are only applicable to CHA 5 4 Frequency modulation FM In Frequency modulation the frequency of t...

Page 15: ...e waveforms table could be used as carrier waveform Before entering into amplitude modulation the users should set the waveform frequency and amplitude value of the carrier wave first under CHA continuous function Press AM key the keyboard indicator of AM will be on and CHA output amplitude modulation signal 5 5 1 Modulation depth Press Menu key and select Depth option and then set modulation dept...

Page 16: ...hase deviation represents the variation of carrier phase while the modulating waveform is with full amplitude in phase modulation When the amplitude of the modulating waveform is at positive peak value the phase of the outputted signal increase one phase shift and when it is at the negative peak value the phase of the outputted signal decrease one phase shift 5 6 2 Modulation frequency Press Menu ...

Page 17: ...form may be any one of the 16 kinds of waveforms listed in the waveforms table 5 7 4 Modulation source Press Menu key select Source option and then set modulation source there are only two values to choose 0 and 1 Set the value as 0 to choose internal modulation source and set it as 1 to choose external modulation source If external modulation source is chosen connect a modulation signal to the Mo...

Page 18: ...le its frequency is equal to the hop rate When the output signal is the carrier a low level sync signal is outputted When the output is hop frequency a high level sync signal is outputted In FSK press FSK key again the FSK keyboard indicator will be off the generator exits FSK function and returns back to continuous function 5 9 Frequency sweeping function In frequency sweep the output frequency c...

Page 19: ...cable for sweeping with wide frequency range 5 9 4 Trigger source Press Menu key select Source option and then set trigger source there are only two values to choose 0 and 1 Set the value as 0 to choose internal trigger source and set it as 1 to choose external trigger source If external trigger source is chosen the sweeping will stop when reaching to the end point then each time you press Shift t...

Page 20: ...ng external trigger source burst output will stop then each time you press Shift trig keys the generator will output a burst then keep on the start phase and wait for next trigger External trigger signal could be chosen as well connect a TTL trigger signal to the Trig In port on the rear panel of the generator The generator will output a burst at the rising edge of each trigger signal then keep on...

Page 21: ...e with the waveform editor software then download the waveform data to the generator Follow below steps 1 Install the waveform edition software written in the CD of the generator to the PC connect the generator to the PC with an USB cable Switch on the generator and select CHA tone 2 Run the waveform edition software to show arbitrary waveform edition interface click clear waveform button with the...

Page 22: ...orage operation Use 1 5 memory area to store user defined setting parameter The 1 memory area stores the power on setting parameters the users may store setting parameters usually used to the 1 memory area which will be automatically recalled when generator power on or system reset Under CHA tone function press Menu key and select Store option then input memory area within 1 5 with the keyboard an...

Page 23: ... press Count key and the Count keyboard indicator will be on and a twinkling Gate mark will appear on the down right corner of the screen now the generator starts to measure the frequency of the input signal and show the measurement value at the same time 5 14 1 Gate time setting Press Menu key and select Gate option the frequency measurement will stop and the users now could set gate time value T...

Page 24: ...et to be 1 the phase of sync signal is the opposite of the phase of the signal from the CHA port 2 When CHB is under continuous function sync signal is a square signal with TTL level the frequency of sync signal is the same as the frequency of the signal from CHB port when the output mode is set to be 0 the phase of sync signal is the same as the phase of the signal from the CHB port When the outp...

Page 25: ...ong time of use To ensure the accuracy the instrument should be calibrated termly Users may regain the accuracy of the instrument by operating the keyboard to calibrate the main specifications without removing the cover of the instrument 5 18 1 Enable calibration After booting the calibration is in off state and the generator could not be calibrated without inputting calibration password this is a...

Page 26: ...ess any numeric keys then key to store the calibration parameters disable calibration and exit the process During the calibration process if wrong calibration occurred press Freq key at any time to disable calibration and exit without storing calibration parameters After rebooting the generator automatically recalls and uses the calibration parameters stored during last calibration 5 19 Default se...

Page 27: ... 6 Chapter 5 Specifications see note 1 6 1 Output characteristics of CHA and CHB 6 1 1 Waveform characteristics Standard waveforms Sine Square Ramp Pulse Noise Exponent Logarithm SINC half round Cardiogram Quake Arbitrary 5 waveforms 6 1 2 Sinewave spectral purity Harmonic distortion 1Vpp 40 dBc 5 MHz 35 dBc 5MHz Total distortion 20 Hz 20 kHz 20 Vpp 0 5 6 1 3 Square pulse and Ramp characteristics ...

Page 28: ...V DC 6 1 8 Phase characteristics Output mode positive opposite Phase difference CHA and CHB 0 360 Resolution 1 6 1 9 Parameter storage characterstics Non volatile parameters 5 groups 6 1 10 Output port Output impedance 50 Ω nominal Output protection Close output automatically if over load 6 2 Modulation characteristics of CHA 6 2 1 FM AM PM PWM Carrier waveform 16 kinds of waveforms including sine...

Page 29: ...ulse count 1 1000000 Start phase 0 360 Trigger source internal external single 6 5 Sync output characteristics 6 5 1 Waveform characteristics Square edge time 20nS 6 5 2 Level characteristics TTL compatible 6 5 3 Impedance characteristics 50 Ω nominal 6 6 Modulation input 6 6 1 Input voltage 5 Vpp full scale 6 6 2 Input impedance 10 kΩ 6 7 Trigger input 6 7 1 Input level TTL compatible 6 7 2 Input...

Page 30: ...ecifications should be done around temperature of 18 C to 28 C after 30 minutes of booting All rights also for translation reprinting and copy of this manual or parts are reserved Reproduction of all kinds photocopy microfilm or other only by written permission of the publisher This manual considers the latest technical knowing Technical alterations reserved We herewith confirm that the units are ...

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