I got such great feedback about the last post on the differences between real-time and sampling oscilloscopes that I thought I would expand those thoughts a bit for this post.
| Real Time Oscilloscope | Sampling Oscilloscope |
Triggering | None Needed | Needs External Trigger |
Trigger Types | PinPoint, Internal, External | External Edge or Clock Recovery |
Sampling | Asynchronous | Synchronous |
Max Sample Rate | 100GS/s* | 200kS/s |
Single Shot? | Yes | No, Must Be Repetitive |
Catch Glitches? | Yes | No |
Record Length | Up to 500M points | 16000 points |
Minimum Time Resolution | 10ps* | 10fs |
Timing Accuracy | Good | Excellent |
Low Noise | Good | Excellent |
Veritcal Resolution | 8-bits | 16-bits |
Capability for TDR? | No | Yes |
Optical Portfolio? | Limited | Extensive |
Top Bandwidth? | 33GHz | 70+GHz |
Price for a 20GHz solution | >$150k | <$50k |
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheD4u2rU490tjFht-7giDIflnlgo_sM_E0Q3w6rhDMGktd71czjXQMO7YeOckyVZT1hgsIlnRMyvTQFm8gVCg7bfUy0PPfMEVzDoP2uVy2zITBOKu9zKDFAThhJNGjLOAIH8pRCh3erOA/s400/RT_Sampling2.jpg) |
Tektronix MSO72004C and Tektronix DSA8300 |
* Real-Time Oscilloscope in Equivalent Time Mode (operating similar to a sampling oscilloscope) can reach 10TS/s or 200fs time resolution, but same limitations of sampling scope apply (signal must be repeated)
No comments:
Post a Comment