10m Zed 2 cable

Hi I have low band issue with 10m zed cable. I am not sure if it is related with cable lenght but I use 2 zed 2 camera with nvidia orin nx board I had to plug them usb3.0 port if you know the carrier board they are near each other. So Should i give external power to the 10m lenght cable if yes what is the voltage range ? I followed low band issue web-page that cannot solve my problem chaging the usb port

Hi @davide
Welcome to the Stereolabs community.
I see a few problems in your configuration:

  1. USB power
  2. USB bandwidth

It’s important to note that the Jetson Orin NX may not be able to provide sufficient power for two cameras, especially if one is connected to a 10-meter extender cable. To ensure adequate power supply, it is recommended to connect the extender cable to an external power source. A power source that provides 5V@1A should be sufficient for this purpose.

Regarding the bandwidth, the Jetson Orin NX has 3 USB3 channels, but not all could be exposed on the carrier board. What model of carrier board are you using?

Hi @Myzhar

Thank you for your fast reply ! I will plug external 5V and 5A adaptor to the each internal power input that located on cable at 2 different part. I am using orginal carrier board for Nvidia Nx series which has 4 usb 3.0

The Orin NX module does not have a dedicated devkit. Are you using the Xavier NX devkit or the Orin Nano devkit carrier board?

Yes, I am using original Xavier Nx devkit carrier.

@davide the Xavier NX carrier board is not compatible with Orin NX module:

†† Jetson Orin NX & Jetson Orin Nano series modules are not pin-compatible with Jetson Xavier NX series modules, but you can design a carrier board for the I/Os they have in common, such that both modules are supported.

You can use the Orin NX module with the carrier board of the Orin Nano devkit, or with a customized carrier board like the J401 from Seeed Studio

Even though it seems that it is not compatible, I tested HDMI and USB-A inputs, as well as ZED-SDK samples, and they all work well.I don’t have any idea about GPIO inputs, and I am not using them. It seems to fit the bill. Additionally, two cameras can work individually, indicating that the voltage is sufficient for standalone use.

In any case, the number of USB3 ports is 4, but the USB3 channel is the same, so each device that you connect will share the same bandwidth.

I see. Thank you for information. I supposed that it can only related with voltage drop through 10m cable but it seems that is beyond my expectation. I will order J401 carrier and will share the result with the community.

Hi @Myzhar

I have received J401 today and sometimes I face low bandwidth issue again. It didnt solve my problem.

Hi again @Myzhar ,

As you suggested, I bought J401 seedstudio board. I followed reComputer J30 Series, J40 Series | J401 | Seeed Studio Wiki the link to flash suitable device tree. The low bandwith gone in zed diagnosis but when i plug 2 camera and try to use multi recording, multi spatial mapping tools, there is still low bandwith error. So I highly recommend to you should really highly markable warning for jetson user, they will eventually face low bandwitdh error when they are try to use 2 zed camera. I wish I had to know to face this error before experince it. I could choose another jetson product like xavier. Do you have solution for this issue. If i connect short cable I dont get low bandwith error after a while some application close themselves. I connect 5.6 A 5V 4 micro usb to the 10 m stereolabs’ cable. How can i diagnoise where the problem is come. from cable or j401 board itselft ?

Hi @davide,
can you correctly connect to each camera singularly with the 10m cable externally powered?
Please also confirm that you are using the latest ZED SDK v4.0.8 which solves a few multi-camera opening issues.

Hi @Myzhar

I have done with external power using with 2 micro usb and 5v 5.6 A charger for each 10m cable.

This is already work with pc without external power but I pluged external power when using with orin nx.

I am using latest 4.0.8 SDK.

If I am not mistaken, j401 share same usb pin and this is the reason bandwitdh issue so they have should used dedicated pin for each usb output.

I think this board could I use JNX42 carrier board for NVIDIA® Jetson Orin Nano™, Orin NX™ – Auvidea

but dont recommend j401 please.!

Hi Davide,
it’s not because they use the same pins, but because they share the same channel.
Are you connecting other devices to USB that can reduce the bandwidth?

I recommend contacting Auvidea before buying the carrier board to be sure that USB3 Type A connectors do not share the same channel, otherwise, you will face the same issues.

Hi @Myzhar ,

I got Auvidea ’ s carrier USB3 Ports seems work but sometimes I got
ZED [0] can not be opened, CAMERA NOT DETECTED
Try to open 2 ZEDs
can’t claim interface 0: -6
ZED [1] can not be opened, CAMERA FAILED TO SETUP

I am testing 2 camera reaching with multiple recording sample.
Sometimes it capture well at the same time sometimes not. I left for a long time approx. 5 min I got seg fault. Any idea ?

Hi @davide
are you using the latest ZED SDK v4.0.8 which provides improvements for multi-camera rigs?

Hi @Myzhar ,

Yes, I have installed new SDK v4.0.8. it works for multiple camera streaming to zed hub flawlessly but other applications are really unconsistent ex. multi spatial mapping multi recoding.

I think that this is realated with video format. Do you recoomend 720 or 1080 p for multi spatial mapping.
If I force the system to load low quality will it effect the result ? which one is suitable for perfect multi spatial mapping. By the way one camera is polorazied and I belive this is not effect

Hi @davide
you are using an Orin NX module, it’s important to keep in mind that it’s a powerful embedded device but it still remains an embedded device.
Therefore, it’s crucial to find a good balance between performance and stability.
There is no one-size-fits-all configuration for it since it mostly depends on the task you are performing.
The only way to find the correct solution is by testing it on the field.