Multi-Camera Configuration for L515 Cameras

In the D415 document, in section 2E, there is the following quote: "For multi-camera case, one camera could be initialized as master and the rest configured as slave. Alternatively an external signal generator can also be used as the master trigger with all cameras set to slave mode." However, the L515 document says, "For multi-camera case, an external signal generator should be used as the master trigger with all cameras set to slave mode." Is there a reason the L515 cannot use the same "master-slave" mode that the D415 allows, and instead is supposed to use an external signal (i.e. with Raspberry Pi 4)?
I want to confirm the sync configuration order; first, I connect the cameras via an external sync signal, then I program them to operate in sync mode using the SDK--correct?
If I follow the HW sync guide to sync my L515 cameras, will they still remained synced if I attempt to use a third party software, such as RecFusion? I don't have their SDK license so I cannot modify anything using their software.

Thank you very much for your guidance.

Zulkifli Halim

Hello Dfr,
Thank you for reaching out.

The two different camera technologies handle syncing very differently as outlined in the whitepapers that discuss syncing. And having an actual sync cable or signal that feeds into both camera technologies is something that we haven't investigated on our side. The D400 has a master/slave type of syncing mechanism with L515, the sync signal is basically turning off the laser in simple terms. And ramping up the laser takes time when the sync signal is initiated to the camera.
Yes, the cameras will need to be connected via sync cables and will need to be configured in software to operate in Sync mode.
For the third-party software, we cannot comment on it as it is not validated from our side.

Sincerely,
Zulkifli Halim