Overview
The turntable TT 8.0-10t is especially designed for flush mounted installation in semi anechoic electromagnetic absorption chambers. The carrier plate is made of stainless steel.
A 290 mm diameter opening in the centre of the turntable provides the capability to insert power supply for testing.
The IEEE 488.2 (GPIB) bus provides an additional control option for all functions, when operated with the SCU/MCU or NCD Controller.
Fig.: Drive unit assembly of turntable
Power supply in the centre of the turntable:
It is possible to integrate various types of connectors for the power supply of the EUT
 |  |
| Figure: Power supply in the centre for EUT | |
Limit switches:
The turntable is equipped with a limit switch and positioning switch system to guarantee the exact positioning of the turntable. An “overturning” of the system is prevented by using limit switches.
Connection to the ground plane:
There is a long-lasting, maintenance-free contact systems included: Material: hollow core copper beryllium tubing.
 |  |
| Figure: Contact system between the turntables and to the ground plane | |
Covering and tolerances:
The covering is made of stainless steel, the gap between the turntable and the ground plane less than 5 mm.
The radial run out is within a tolerance of +/- 3 mm.
The height differences are within a range of 10 mm or better.
 |  |
| Figure: Level system of turntable for height adjustment | |
 | |
| Figure: Stainless steel cover plates | |
Turntable structure:
Solid welded steel construction; parts are assembled with screws (for easy transportation). The complete structure is galvanised for long-lasting performance of the system.
Figure: Turntable structure made of solid welded galvanised steel
Further specifications and options available upon request
The following options are available upon request:
- Power supply in the centre with different connectors
- External power supply outside the centre with energy chain
- Continuous rotation with integrated slip rings or rotary joints
- Integrated exhaust gas extraction system
- Higher positioning accuracy
- Outdoor applications
| Technical Data | |
| Diameter | 8.0 m |
| Permissible load | 10.000 kg |
| Point load | 1.250 kg (at area of 10cm x 10cm) |
| Total height | min. 1.0 m |
| Material carrier plate | Stainless Steel |
| Rotating speed adjustable between | 0.3 to 1.0 rpm |
| Rotating angle | +400°/-200° |
| Positioning accuracy | +/- 0.5° |
| Turntable drive | Helical-bevel gear |
| Motor | Servo motor, frequency inverter |
| Interference suppression | 20 dB under limits EN 55022 class B |
| Control cable | Plastic optical fibre cable 980/1000 µm |
| Attenuation of fibre cable | 625 nm |
| Remote control via | IEEE interface |
| Current consumption | max. 32 A |
| Voltage | 380-400 VAC, 50/60 Hz, 3-phase |
| Concentricity tolerance | +/- 3 mm |
| Elevation tolerance less than | 5 mm |
| Ground plane connecting every | 50 mm |
| Square border interface (Easy fitting into Groundplane of chamber) | 8.5 m x 8.5 m |
| Temperature range | +10°C to +35°C |
| Total weight | approx. 15.000 kg |
| Accessories | Interface to SCU/MCU/NCD Controller 1.5 m power supply cable Service manual |
