LVDS (Low Voltage Differential Signal)

Ask for and share advice on using the PicoScope kit to fix vehicles here.

LVDS (Low Voltage Differential Signal)

Postby LM358 » Sat Sep 05, 2015 12:11 pm

Hallo,

I am a Technical Trainer for Renault in Belgium.
On New Espace 5 & Kadjar, Renault uses LVDS for data transport between the RadioNav-unit and the RLink-screen.
I am trying to visualise the signal, which should look like CAN, but with lower voltage levels (between 1.2 and 1.35 (high) and between 1.2 and 1.05 (low)). Speed is also higher than CAN-speed.
With my Pico 4423, I am unable to detect the signal. All I see is a very noisy signal without any content.
Do I need better probes, or is the transmission speed to high for the 4423 ?

Does anyone have any experience with LVDS ?
Thanks in advance for helping me.

BR - Eric.
LM358
Newbie
 
Posts: 3
Joined: Sat Sep 05, 2015 11:49 am

Re: LVDS (Low Voltage Differential Signal)

Postby Robski » Sat Sep 05, 2015 3:13 pm

Have you tried a filter & vertical zoom ?
User avatar
Robski
Advanced User
Advanced User
 
Posts: 602
Joined: Tue Sep 14, 2010 6:36 pm
Location: Yorkshire

Re: LVDS (Low Voltage Differential Signal)

Postby Fat Freddy » Sat Sep 05, 2015 11:53 pm

Here's a Pico set up for LVDS. And this is an 8 bit scope.

https://www.picotech.com/library/applic ... resolution

HTH
FF
User avatar
Fat Freddy
Zen Master
Zen Master
 
Posts: 267
Joined: Fri May 04, 2012 4:52 am

Re: LVDS (Low Voltage Differential Signal)

Postby PicoPhil » Fri Sep 11, 2015 10:07 am

Hi Fat Freddy
I have not had any involvement with the Radionav to R link system on a Renault before. On some systems like Flexray we have to use a 60MHZ probe. Would you like me to provide me with an address/ contactdetails and i will send you a probe to try.Hope this helps.
Philip
PicoPhil
Pico Staff Member
Pico Staff Member
 
Posts: 69
Joined: Thu Dec 23, 2010 11:38 am


Return to Diagnostic discussion

Who is online

Users browsing this forum: No registered users and 0 guests