DOC Skip to main content
Documentation
>
Orbbec Gemini 330 Series Documentation
>
Gemini 335Lg Recommended FAKRA Connector & Cable Specifications
Orbbec Gemini 330 Series Documentation

Gemini 335Lg Recommended FAKRA Connector & Cable Specifications

Update on 2025-07-25 02:34:50

This documentation illustrates the recommended FAKRA connector and cable specifications for Gemini 335Lg.

1. FAKRA Connector Introduction

FAKRA (Fachkreis Automobil, a German standard) connectors are SMB based automotive-grade connectors that can operate up to 6 GHz. These connectors are embedded within a plastic housing with a locking feature that has an audible clicking noise which lets you know a connection has been made. They are available in 14 different mechanical layouts, which are color coded for easy identification and mis-matching prevention.

Orbbec Gemini 335Lg is equipped with FAKRA-Z connector.

Figure 1-1 Different FAKRA Connectors

The Gemini 335Lg camera utilizes ADI’s GMSL2 technology, a cost-effective, simple, and scalable SerDes solution. Fakra cables, which connect the Serializer and Deserializer, have a significant impact on the performance of the GMSL2 channel. Different cables have various characteristics and are suited for different applications.

For example, lightweight and flexible cables with a small bending radius usually have thinner wire cores, which require less copper and are relatively low-cost. However, their insertion loss and return loss characteristics are not the best, making them suitable for short-distance applications where the equipment is not fixed and may require frequent bending. On the other hand, cables with thicker wire cores have better insertion and return loss characteristics, making them ideal for long-distance transmission and fixed installations where the equipment doesn’t need to be moved. However, the thicker wire cores also come with higher costs. Regardless of the cable type chosen, it must meet ADI’s GMSL2 channel specifications.

The serializer chip used in Gemini 335Lg camera is the MAX9295D, which supports both coaxial and twisted-pair transmission. Since the module also utilizes POC (Power over Coax) technology, the external Fakra connection cable must be coaxial. Below is a table listing the key parameters for selecting Fakra cables, based on ADI’s GMSL2 technical documentation.

Table 2-1 Cable specifications

Category Recommend Spec. Notes
Cable type Coaxial cable
Transmission frequency range 0 ~ 6GHz  
Characteristic impedance 50Ω ± 2Ω Reconmended
Rated current ≥ 1A Typical POC voltage: 12V；Ripple: ≤ ±10%
DC resistance ＜ 0.1Ω/m  
Insulation withstanding voltage ≥ 500V AC  
Insulation resistance ≥ 100MΩ  
Contact resistance ≤ 5mΩ (Initial)  
Cable length The maximum length

 

of commonly used cables

are listed as follows:

RG174：≤5m

Dacar 302/RG58：≤15m

 According to ADI’s MAX9295D datasheet, “Cables with an attenuation of 1.1dB/m can support up to a maximum length of 15m (3.2mmφ, 6Gbps, 105℃).”

 

Detailed information is in page 1.
Bend radius RG174:

 

Static 3x cable OD；Dynamic 10x cable OD

Dacar 302：

Static 5x cable OD；Dynamic 15x cable OD

 OD: Out Diameter
Insertion loss (IL) −17dB MAX @ 3GHz

 

(6Gbps / 187.5Mbps)

 Information is according to “GMSL2 Channel Specification User Guide
Rev 1“. Detailed information is in page 16.
Return loss (RL)
Tensile strength ≥ 110N  
Ingress protection IP67 (recommended)  
Ambient temperature -40 ~ 105℃  
Recommended cable and connector manufacturers Cable: Amphenol RF, Belden wire & cable, TE Connectivity, HUBER + SUHNER, Lenoi, etc.

 

Connector: Rosenberger, Molex, TE Connectivity, Amphenol RF, etc.

  
Recommended cables Allied Vision, Inc.

 

https://www.wdlsystems.com/allied-vision-18424

https://www.digikey.com.au/en/products/detail/allied-vision-inc/CABLE-FPD-LINK-III-GMSL2-5M-COAX/22195452

Amphenol RF: https://www.mouser.com/ProductDetail/Amphenol-RF/095FJZFJZSHM500?qs=zW32dvEIR3sjRLgtRmvHeA%3D%3D

 https://www.mouser.com/datasheet/2/18/2/

 

Amphenol_RF_FAKRA_Cable_Assemblies_

Cutsheet-3440413.pdf

3. Orbbec Default Cable Drawings

   i. Orbbec Box-packed Gemini 335Lg Default Cable Drawing

   ii.  Orbbec Gemini 335Lg FAKRA Connector Drawing

ON THIS PAGE

Add

  • Name：

  • Link Address：

Cancel

Add

  • Name：

  • Link Address：

Cancel
Questions or
Feedback?

Feedback

  • Your feedback matters! Share your thoughts on this page, report errors, or let us know how we can improve to better support your needs. If applicable, please include the specific sentence or section to help us identify and address the issue.

@2025 0rbbec Inc. All Rights Reserved.

Stay Updated

Be the first to learn about our new products and updates.

Back to top