Connecting your sync generator to other modules


#1

This is a guide to understanding video sync distribution in your modular video synth. Some video synthesis modules require connection to the master timing references of the system generated by the system’s video sync generator. A sync generator module sends sync pulses to modules which require them.

There have been 2 standards for distribution of master sync in the history of the LZX video synthesis standard:

  • Video Reference via rear RCA Connectors. This is the current standard for production modules. There is an RCA jack input / output on the rear side of modules that require these connections. The output from the sync generator module is connected to the input of the next module which requires it, and this connection is daisy chained throughout the case from module to module.

  • 14-pin Sync Distribution Cable. This standard was using with our first generation modules (Visionary series) and is still in current use by our DIY series modules (Cadet, Castle.) A 14-pin ribbon cable with multi connectors is used to send 5V TTL level signals from the Sync Generator module to other modules in the rack.

Modules that can generate master sync include:

  • Visual Cortex (Rear RCA Sync In + Rear RCA Sync Out + Rear 14-pin Sync Distribution Cable Out)
  • Cadet I Sync Generator (Front RCA Sync In + Front RCA Sync Out + Rear 14-pin Sync Distribution Cable Out)
  • Memory Palace (Rear RCA Sync In + Rear RCA Sync Thru + Rear RCA Sync Out)

Modules which require connection to a sync generator include:

  • Prismatic Ray, since 2018 production (Rear RCA Sync In + Rear RCA Sync Thru)
  • War Of The Ants (Rear RCA Sync In + Rear RCA Sync Thru)
  • Diver (Rear RCA Sync In + Rear RCA Sync Thru)
  • TBC2 (Rear RCA Sync In + Rear RCA Sync Thru)
  • Fotress (Rear RCA Sync In + Rear RCA Sync Thru)
  • Navigator (Rear RCA Sync In + Rear RCA Sync Thru)
  • Liquid TV (Rear RCA Sync In + Rear RCA Sync Thru)
  • Cadet IX VCO (Rear 14-pin Sync Distribution Cable In)
  • Cadet II RGB Encoder (Rear 14-pin Sync Distribution Cable In)
  • Cadet IV Dual Ramp Generator (Rear 14-pin Sync Distribution Cable In)

Modules which receive sync via the EuroRack CV/Gate connections on the power header:

  • Prismatic Ray, before 2018 production
  • Castle Clock VCO

Should there be a 14-pin sync header on Castle 010 Clock VCO?
War Of The Ants animation and speed control don't seem to be working
#2

#3

Can you also talk a bit about the power bus sync which was used on Prismatic Ray and the Castle VCO prior to the move to RCA sync jacks on the back (at least for PR) in 2018?

Edit: I found this relevant post: