Hello,
I bought this oscilloscope (GDS-2204e 1050€ on tme.eu) to try to solve some rs232 issues, I like it but I don't know if rs232 decoder is working properly (firmware version 1.32).
I connect the GDS-2204e and a DS1054Z to the same signals and I get different decoder results.
I am triggering the oscilloscopes at yellow signal's rising edge and capturing an uart communication (
57600 8N1).
![](https://c1.staticflickr.com/5/4594/24336898727_7df5802198_o.png)
![](https://c1.staticflickr.com/5/4679/24336898217_1f3d41bce3_o.png)
When I look at the same communication packets on the oscilloscopes I see different decoder results:
Rigol
![](https://c1.staticflickr.com/5/4685/24336898657_38e1326c5b_o.png)
![](https://c1.staticflickr.com/5/4593/24336898627_c1a88716f4_o.png)
GW
![](https://c1.staticflickr.com/5/4725/24336898157_33c0986626_o.png)
![](https://c1.staticflickr.com/5/4739/24336898097_34470d41de_o.png)
If I look at the first byte, I think rigol is decoding the signal right, at 57600 this is 02 (if I am not wrong
![Smiley :)](https://www.eevblog.com/forum/Smileys/default/smiley.gif)
):
![](https://c1.staticflickr.com/5/4684/25332409758_919f502892_b.jpg)
![](https://c1.staticflickr.com/5/4727/24336898577_1f9db8cecb_b.jpg)
![](https://c1.staticflickr.com/5/4734/24336898267_ec26d6713e_b.jpg)
Am I doing anything wrong with the GD-2204e or is it a bug?
If the GW doesn't decode the RS232 properly I will return it. Any good and cheap.. oscilloscope recommendation to work with serial buses (I2C, SPI, RS232 and
full memory decoding)?.
Thank you and excuse my english.