Grass Valley DCR 4000 - Manual (Page 18)

v4.0
DCR 4000 User’s Guide | Installation 1-12
1.7.3 Multiple Viper-Venom configuration with multiple Lockit boxes
The mechanism described under 2 had the disadvantage that the time code and
synchronization are lost when the camera and Venom are switched off. In a ‘battery powered
situation’ this often occurs. So solve this, we have to use a Lockit box for each Viper - Venom
combination. This is shown in the diagram below:
At the start of a working day, all Venom-Viper combinations are brought together. The Lockit
boxes are connected to a master clock (this can be one of the Lockit boxes), and to one
reference (gen-lock) signal. This way all Lockit boxes are synchronized both in the reference
signal and in the time code. Each Viper-Venom camera is connected to a Lockit box, which
provides both the gen-lock and LTC-in signal to the docking plate. The clock in the Lockit box is
stable enough to allow for synchronization at the start of a working day only. When the Viper
and Venom are switched off, the internal clock in the Lockit box continues running.
*) Lockit is a registered trademark of Ambient Recording GmbH, Germany.
Venom
Audio
HD-SDI
Power
Confidence Out
2
LTC
Power
HD-SDI
HD-SDI
Genlock
2
2
Multicore Cable
(no power in cable if Viper
power plug is used)
2
Genlock
Lockit
Scratch Audio Transmission
Viper #1
Viper #n
2
LTC
Audio
Recorder
LTC
Genlock
Lockit
Lockit
Master
Clock
- will be wired to Lockit once a day ( session ... )