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How to promote an USB oscilloscope to individual engineers? I am the Loto instru
jiangtao.lv:
nice,20M here takes 50$~60$. 25M takes about 90.
jiangtao.lv:
Finally , I finished the DS for it. There is a limitation for the size of attachment,so I depart it into two.
exe:
Quickly looked the first video, looks bogus to me. Starting from noise comparison, then capturing 20MHz signal with *X1* probe... And somehow a 200MHz scope (with effective bandwidth over 350MHz, afaik) gets worse reading than a 50MHz one?? I won't be surprised if 50Ohm termination is set incorrectly. On top of that the title says "performance of USB oscilloscope OSC802 comared to the desktop one". This simply doesn't make sense at all. You are implying that your device is better, but it's clearly not. The whole video looks like a hoax from start to end. That's the worst advertisement you can do for your product in engineering community.
rsjsouza:
--- Quote from: jiangtao.lv on February 19, 2019, 11:28:50 am ---Finally , I finished the DS for it. There is a limitation for the size of attachment,so I depart it into two.
--- End quote ---
Good looking datasheets. A few comments.
Features:
1. Add "weight" to the first line (up to 210g) - it helps with the claim of being "portable"
2. Remove "provide". "General Purpose I/O interface (TTL 3.3V)"
4. Remove "provide". "Open software API for third party development"
5. remove "with no additional power required"
9. Supports serial bus decoding (selected models)
Applications: it seems there is a mix of product features and the applications. A few examples I found are:
2. What is "Embedded in teaching equipment"? Perhaps re-write to: "Embedded electronics courses for the educational market"
3. "Ripple and noise measurements for power supply characterization"
4. "Serial bus decoding of multi-sensor systems"
5. "Analog data acquisition systems" This seems to be a feature and not an application. Also, "DIO control"? Perhaps re-write to Digital I/O control
6. "Current and Voltage recording" is a feature, not an application. The application would be "Solar power supply and lighting systems"
- "Diagnostics device for field engineers"
I would remove the periods at the end of every sentence inside the table. Usually periods are not used in this context.
The Specifications table on pages 2 and 3 of the second datasheet have confusing headers. At page 2 there is a black bar with four columns with model numbers, while at page 3 the same four columns are shown without a header, only to change to three columns all of a sudden.
Also, the placement of the 20mV/div on the "Typical" row at the end of page 2 is strange.
I would also move the physical specs, temperature, compliance and languages to the end of the table.
Perhaps add a section that talks about the minimum specifications of the PC software and the Android app.
The table "At a glance" should come after "Applications". It allows people to quickly grasp the most suitable product for them.
At page 4, the DB15 drawing on the right has a tabulation issue with the pin 12 description. Still on this page, the description for pins 8 and 9 are smaller, which could instead be extended out to have the same font size. If horizontal spacing is not enough, you could have a single drawing and simply describe pin 9 as "9:IO4 (only on OSC48x)"
Page 5: there is no space between the M and the Hz, as well as the numbers and their units. For example:
10x: 60MHz, 10MΩ, 600V CAT II
At the same page, remove "Printer cable". I would specify it as a "USB2.0 compliant, length: 1m (or whatever length it is), USB Type A Male to USB Type B Male."
glarsson:
Page 4 mentions a mythical DB15 connector but shows what appears to be a DE15 connector. If the connector is the same as for VGA then it's a DE15. A DB15 would be the same size as a DB25 but with only 15 pins. I've never seen one of those.
Also, software is missing for Mac OS and iOS.
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