ETS-Lindgren 2188 - 1 Introduction; Standard Configuration; Turntable Assembly

Introduction | 7
1.0 Introduction
The ETS-Lindgren Model 2188 Turntable is an electric-powered, variable-
speed turntable platform system designed for use with the EMCenter Modular RF
Platform (or next generation ETS-Lindgren controller, if applicable) to perform
EMI compliance testing. The Model 2188 is available in 1.0-meter, 1.2-meter,
1.5-meter, and 2.0-meter diameters. The turntable is ideal for installations in new
or existing test locations where pit excavation is not an option or must be
shallow.
The top of the turntable is conductive with a continuous ground brush to
electrically couple it to the ground plane. The ground brushes are attached
directly to the chamber floor by the floor flange and are in continuous contact with
the turntable top. The brushes point downward from the floor flange.
The drive motor and gearing are located beneath the platform. The Model 2188
is powered by an electric motor through a worm gear box with a chain and
sprocket final drive. The top of the turntable is removable to provide easy access
in the event that service is required. The electronics are located in a shielded
enclosure. Signal I/O is through fiber optic cable.
To prevent over-travel of the turntable in either direction of movement, hard limits
are provided in the form of pins that actuate switches located below the tabletop.
These pins allow limits to be set and allow as much as two full rotations. Rotation
speed can be varied from the front panel of the controller or through the
IEEE-488 interface bus.
Standard Configuration
TURNTABLE ASSEMBLY
Featuring continuous or non-continuous operation, the turntable assembly
includes:
 Single-phase electric drive (208–230 VAC 50/60 Hz)
 Variable-speed drive
 Conductive top
 Continuous rotation
 10-meter fiber optic control cable
 Fiber optic shield penetration kit
 Fiber optic feedthroughs (2)
 3-meter fiber optic control cable