About this project
I started developing high bandwidth oscilloscopes in 2007. The main goal was to develop a high bandwidth, low cost, oscilloscope hardware and PC software with USB interface.
Initial bandwidth target was 1 GHz. The only remaining proto is shown in the picture below.
1 GHz Bandwidth was achieved, but since speed of electronics circuitry continues to rise, I realized that 1 GHz bandwidth is not that useful as it used to be.
Second proto have gradually achieved Bandwidth of 4, 8 and finally 11 GHz.
DS800 series 11 GHz scope manual is available at: http://www.fastsampling.com/Products/DS800/DS800Manual14.pdf
DS 800 is expensive to make, and due to low volume production, it is mainly out of stock and lead time is several weeks.
I believe that product like that should be in stock with price tag around $500. Now, after finding out about kickstarter platform, I have designed and built proto of even lower cost, small footprint oscilloscope, while keeping the key performance intact.
Picture below shows final look of DS100, low cost 10 GHz oscilloscope.
DS100 series 10 GHz scope manual is available at:http://www.fastsampling.com/Products/DS800/DS100Manual.pdf
The final version will have holes for air flow and labels.
Picture below shows working proto od DS100 scope with one wire placed to fix one schematics error. The wire will not be on the final production unit.The production unit will have slightly different and cleaner look.
I have also designed several small accessories to this scope and they will be offered as rewards. Picture below shows 4.4 GHz synthesizer based on ADF4350. We will use newer and better performing ADF4351 for production.
This simple hardware comes with a simple VB application, and it is great to be used for scope time base verification and calibration, but also can be used as stimulus for various test in combination with DS100 scope.
The frequency divider shown below is useful to divide high frequency to extended trigger input frequency range or it can be used to extend frequency range of the frequency counter.
The image below shows resistive power divider made of SMT 15 GHz power divider, a small PCB, and 3 SMA connectors. This is very useful hardware whenever the high frequency signal have to be split in 2 equal power outputs.One good example is dividing one signal to generate one signal for trigger and one for input oscilloscope channels.
Picture below shows 35 ps rise time edge generator, based on ONET8501. This fast edge can be used as stimulus for impedance measurement using TDR method. Production unit will have a clean PCB with green solder mask.
Video below shows the GUI interface with 1GHz 0.5Vpp sine sourced by a SAW oscillator.
Why support is needed?
There are two main reasons.
First one is real simple, to reduce cost of any product, the production quantity must be significant. My goal is to build at least 500 units.
Second reason is about building the momentum; it is about giving a new life to this product; it is about making this product a bigger, more exciting adventure.
Developing this product was an exciting, challenging and fun adventure. Now, I invite you to support this project and soon you will have a nice tool for exploring fun world of high speed circuitry.
Thanks For Your Support!
Risks and challenges
Designing analog and digital circuitry operating at several GHz and controlling timing with picosecond resolution is challenging project, but this phase was over about 3 years ago, and since then i have designed several versions of pretty much the same product.
This product is basically just a lower cost flavor of something already designed an tested in filed.
The only significant challenge I may have is the one I would actually love to have, and it is taking care of production and shipment of a high qty of products as rewards.
The plan is to use a Contract Manufacturer based in USA (4pcb, screaming circuit...etc) to produce and inspect the boards.
I will test and calibrate every board in case that the quantities are up to 300.
In case of greater quantities, I will make automated test and calibration system and test procedure, and contract task of testing and shipping to the the CM service provider in USA.
The majority of components will come from qualified suppliers like Digi Key and Mouser.
I can handle this project by myself with collaboration of Electronics Contract Manufacturer.
However, I can also engage few coworkers (engineers) and technicians to help me on a part time base, in case that support exceeds all of my expectations.
Yes, it is in this case, where 10 GHz signal travels very short distances of less then 0.5 inch.
Using higher RF quality material will significantly increase the cost, but difference in performance would be hardly noticeable.
By design, the differential transmission lines have a strong coupling to inner layer ground, but very weak coupling to top layer copper plane.
Adding via stitching would limit the number of traces which can be routed under the transmission lines.
This would increase the board size and cost, while improvements to signal integrity would be minimal.
It is all about cost versus performance analyses
To save money for more important items, like front end chips, which would cost about $80 per product, assuming that project is successful and I can buy at least few hundred pieces.
There are few other ECL flip flops and one delay line used in this product which is way more expensive then typical CMOS logic.
The box costs about $2 and it does not contribute much to the key performance
- (30 days)