Electronic Synchronizer Systems—
Camera to Projector Synchronizer

PANAVISION cameras can be synchronized to projectors either by means of the Phasable Synchronizer unit or by the Camera—Projector Electronic Synchronizer unit. These units not only ensure that any PANAFLEX, PANASTAR or SUPER PSR camera will operate at exactly the same speed as a film projector but will also ensure (providing that the probe is properly set on the projector) that the shutters of the two units open at precisely the same moment. It is an essential accessory for front and rear projection process filming.

To operate either synchronizer unit an electronic probe unit must be fitted in close proximity to a raised stud attached to some part of the projector which rotates once every frame. This will generate a reference pulse which will replace the internal crystal control pulse within the camera and to which the camera will automatically synchronize. A suitable probe unit for the projector can be supplied on request.

The stud and the probe unit must be set relative to one another so that they pass at the moment when the projector shutter is 48° past its closed position. It is advantageous if the probe unit can be rotated relative to the stud to allow for fine adjustment both of synchronization and of the relative exposure between the foreground and background of the process shot. If the stud can be rotated 180° relative to its normal shooting position this setting can be used during rehearsals to check the lighting balance between the projected image and the foreground.

The clearance between the stud and the probe should be approximately 1/16", 1.5mm. If it is too close double pulsing may prevent sync, and if there is too much clearance no pulse will be generated. If necessary adjust the probe in or out until the camera synchronizes properly.

The AUDIO SYNC (3-pin LEMO) connector makes available a 1 volt RMS sinewave signal that may be used as a pilotone reference for sound recording. A mating cable is supplied with bare wires on one end for this purpose. The frequencies are as follows: 60 Hz at 24/24, 30/30 and 30/24 and 50 Hz at 25/25.

Absolute synchronization may be verified by removing the film and replacing the aperture plate with an Aperture Viewing Mirror.

1. a. & b. Camera to Projector Synchronizer unit, 2. Camera to Projector Synchronizer schematic of connections.