LVDS (Low Voltage Differential Signal)

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LM358
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Joined: Sat Sep 05, 2015 11:49 am

LVDS (Low Voltage Differential Signal)

Post by 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.

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Robski
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Location: Yorkshire

Re: LVDS (Low Voltage Differential Signal)

Post by Robski » Sat Sep 05, 2015 3:13 pm

Have you tried a filter & vertical zoom ?

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Fat Freddy
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Re: LVDS (Low Voltage Differential Signal)

Post by 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

PicoPhil
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Joined: Thu Dec 23, 2010 11:38 am

Re: LVDS (Low Voltage Differential Signal)

Post by 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

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