Custom Header

Providing excellent service, technical support & of course, competetive pricing!
+971 02 5537701

Wednesday, April 6, 2016

Generating Multi-PhaseWaveforms

Applications for multi-phase waveforms are everywhere – in Power-related applications, I/Q modulation, Automobile applications, Components,etc.

While Siglent’s SDG2000X series arbitrary waveform function generators all have two independent outputs with adjustable phase offsets, some applications call for three or more different signals, each with a phase relationship that is locked-to but adjustable from the other waveform phases. There are two main methods to accomplish this. For this application note we will use the SDG2000X generator.

Key Features
◆ Dual-channel, 40MHz/80MHz/120MHz maximum bandwidth, 20Vpp maximum output amplitude, high fidelity output with 80dB dynamic range
◆ High-performance sampling system with 300MSa/s sampling rate (1.2Gsa/s by 4X interpolation technology)  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 with a sampling rate in range of 1μSa/s~75MSa/s
◆ Innovative Easy Pulse technology, capable of generating Square with lower jitter 150ps or Pulse waveforms, brings a wide range and extremely high precision in pulse width and rise/fall times adjustment
◆ Plenty of analog and digital modulation types: AM, DSB-AM, FM, PM, FSK, ASK and PWM
◆ Sweep and Burst function
◆ High precision Frequency Counter
◆ Standard interfaces: USB Device, USB Host, LAN(VXI-11, support U Disk storage and software, upgrading GPIB port is optional
◆ 4.3” touch screen display for easier operation


Each SDG2000X series generator has a built-in10MHz time base output/input port on the rear panel. Because each SDG2000X has two independent front-panel waveform outputs along with the ability to separate them by a calibrated amount of phase, we can use one SDG2000X for every two phases that is needed.
If only 3 or 4 phases are required for the application, simply connect the 10 MHz output from the first SDG2000X (Unit 1) to the 10 MHz input port of the second SDG2000X (Unit 2) via a suitable coaxial cable connection as shown in Photo 1. In this photo, the top generator’s time base is connected (Unit 1) to the bottom generator’s 10 MHz reference input (Unit 2) via a coaxialcable.

The next step is to set Unit 2 so that it uses the external 10 MHz time base (from Unit 1). On the Unit 2 keyboard:
a) Press UTILITY key on the front panel.
b) Choose Page selection
c) Chose CLKSource and push key to select External

The two SDG2000X generators are now sharing the Unit 1 time base. Notice that the two outputs from Unit 1 are synchronized1 and have adjustable phases. The same is true for the two outputs from Unit 2. However, there will be a phase offset of some arbitrary value existing between Unit 1’s two outputs and Unit 2’s two outputs. This is due to the fact that the two generators are locked to the same time base but the outputs were not synchronized upon power-up2 
The two outputs on Unit 2 can now be adjusted to be in phase (using and oscilloscope or other suitable phase displaying device) to the outputs from Unit 1. Once Unit 2’ outputs are inphase with Unit 1’s outputs then make note of the phase readings for the output’s from Unit 2. These ‘offset’ values will then need to be subtracted from any subsequent phase adjustment readings.

In Method 2, Unit 2 will use its own internal time base so CLKSource will be set to Internal on Unit1 and Unit 2.In this method, Unit1 will trigger Unit2 (and additional units if they are used) so that a residual phase offset is not present and does not need to be subtracted out of the settings.
On the rear panel, connect the theAux In/Out connector from Unit 1 with a coaxial cable to the Aux In/out connector on the back panel of Unit 2 (Photo2).
Once the connections in both Photo 1 and Photo 2 are made the generators are ready to set up from the front panel.
a) Push the BURST button. Make sure the unit is in NCYCLE mode and set for 1cycle.
b) Select Page then set the ‘Tirig Out’ selection for ‘Up’ ,Source should be set for Internal
c) Repeat step a for CH2.

a) Push the BURST button. Make sure the unit is in NCYCLE mode and set for 1cycle.
b) Select More then set the ‘Edge’ selection for ‘Up’. Source should be set for External.
c) Repeat steps a and b for CH2.

To Synchronize the Two Generators
The Phase adjustment for the two Unit 2 outputs can be adjusted from the Starting Phase screen under Burst for each of the two channels.
This photo (Photo 3) shows 4 output sine waves generated from two separate SDG5000 generator. Channel 2 is set to a 90 deg phase, Channel 3 (Unit 2, Channel 1) is set to 180 degrees and Channel 4 (Unit 2, Channel 2) is set to 270 degrees. Notice that the phase shifts are Leading.
If CH1 and CH2 are out of phase for either unit during setup choose EqPhase from the menu in order to align the two phase 


  1. I have heard about this generator before, and even wanted to buy it, but my friend said that its a little bit unreliable. I trust my friend, cause he is true beast in such technic. After that accident he advised me rigol dg1022 that I have been using for one years, and really, I still didnt have even single problem with it.

  2. This comment has been removed by the author.

  3. There are certainly a lot of details like that to take into consideration. That is a great point to bring up. I offer the thoughts above as general inspiration but clearly there are questions like the one you bring up where the most important thing will be working in honest good faith. I don?t know if best practices have emerged around things like that, but I am sure that your job is clearly identified as a fair game. Both boys and girls feel the impact of just a moment?s pleasure, for the rest of their lives.
    top selling dashboard cameras

  4. Dear Customer .. Tabuk Furniture Moving Company - the leading company in moving furniture Tabuk and furniture storage - offers you its services with the highest quality and efficiency and the lowest prices.
    شركة نقل عفش

    شركة نقل اثاث من الرياض الى الامارات
    شركة نقل عفش من الرياض الى الامارات
    شركة نقل عفش بالطائف

  5. Thanks for sharing the best information and suggestions, I love your content, and they are very nice and very useful to us. If you are looking for the best Nikon Binoculars Ireland, then visit On Sale Now. I appreciate the work you have put into this.

  6. Great work man you have post a great post it will help people very much keep it do more for people like that Automated Forex Trading System: a solution for any Forex trader

  7. Best work you have done, this online website is cool with great facts and looks. I have stopped at this blog after viewing the excellent content. I will be back for more qualitative work 6 Reasons Why Defensive Driving Can Spare Your Life

  8. Your online diaries propel more each else volume is so captivating further serviceable It chooses me happen for pull back repeat. I will in a blaze grab your reinforce to stay instructed of any updates. hidden car camera

  9. looking for the best and better At P.A.C Mobile Detail, my goal is to provide professional auto detail services across the local NWA area. pacmobiledetailing2

  10. I agree with a lot of the points you made in this article. If you are looking for the NDA0100, then visit TotalMedtech. I love your content, they are very nice and very useful to us and this text is worth everyone’s attention.

  11. I am student of electronics and electrical engineering sector. I like spiderman porn ptarody for improving the search results related to adult industry.

  12. Wow, What an Excellent post. I really found this to much informative. It is what I was searching for. I would like to suggest you that please keep sharing such type of info. audio amplifiers for sale online New York