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TBTC2 - Tekbox Anechoic Chamber Alternatives

$969.00

  • Model: TBTC2
  • Manufactured by: Tekbox
  • Extra Specifications: Length: 636 mm Width: 300 mm Height: 205 mm Septum height: 100 mm TEM cell connectors: N-female Nominal cell impedance: 50 Ohm Wave impedance: 377 Ohm Maximum RF input power: 25W Input return loss: S11 up to 800 MHz < -15dB, up to 1.5 GHz < -10dB, up to 3GHz < -14dB Transmission loss: up to 800 MHz < 1 dB, up to 1.15 GHz < 3dB
 
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Tekbox TBTC2 Overview

TekBox TBTC2

BRL Test is your authorized TekBox distributer 407-682-4228

The TekBox TBTC2 is an EMC pre-compliance alternative to anechoic chamber.

Radiated emission tests are typically carried out in anechoic chambers, using antennas to pick up the radiated signals. Due to bandwidth limitations, several antennas are required to cover the complete frequency range. Furthermore, it requires much space and the cost of the equipment for a standard conformant setup is immense.

An engineer of a small or medium size enterprise usually has to rely on his experience and on best practice methods in order to design an EMC compliant product. Nevertheless, it is estimated that > 50% of products fail testing first time around. Anytime an engineer sends a new product for compliance testing, it is a shot in the dark. Failing is very expensive. Not only that re-testing costs are high, but also the project schedule and market introduction gets delayed.

What is needed is an affordable laboratory set up to measure radiated emissions in the own lab, prior to compliance testing. A TEM cell is the right piece of equipment for desktop testing of radiated emissions. Tekbox developed the TBTC2 to cover the complete frequency range up to 2GHz and with usability even at frequencies beyond.

Combined with a spectrum analyzer, products can be tested before and after EMC related design modifications.  A set up with a TEM cell will not deliver exactly the same quantitative results as a measurement in a certified test house, however it will give an excellent indication on whether the design suffers from excessive radiated noise or not.  The engineer will clearly see, whether his changes improved or deteriorated the EMC performance or whether it remained unchanged. The TBTC2 eliminates the guesswork.

A TEM cell is a stripline device for radiated emissions and immunity testing of electronic devices. It is not a replacement, but due to its size and cost it is a convenient alternative to measurements in an anechoic chamber.

 

A TEM cell consists of a septum, the conductive strip in the centre section and walls which are connected to ground. The geometry is designed to present a 50Ω stripline. The device under test (DUT) is placed in between the bottom wall and the septum.

 

The TBTC2 is a so called ?open TEM cell?, which got no side walls for convenient placement of the DUT. It may pick up RF background noise, which however can be taken into account by doing a measurement of the cell output signal before powering on the DUT.

 

The TBTC2 got a better frequency response compared to standard TEM cells of similar size. TEM cells suffer from higher order wave modes which limit the usable bandwidth. A unique design feature of the TBTC2 implements resistance perpendicular to the desired propagation direction of the wave. Consequently higher order wave modes and resonances are suppressed.

The device is supplied together with a 50Ω/25W RF termination and a DC block to protect the spectrum analyzer or RF receiver input.

 

Technical Data:

 

TEM cell dimensions:

Length: 636 mm

Width: 300 mm

Height: 205 mm

Septum height: 100 mm

TEM cell connectors: N-female

Nominal cell impedance: 50 Ohm

Wave impedance: 377 Ohm

Maximum RF input power: 25W

Input return loss: S11 up to 800 MHz < -15dB, up to 1.5 GHz < -10dB, up to 3GHz < -14dB

Transmission loss: up to 800 MHz < 1 dB, up to 1.15 GHz < 3dB

 

DC-Block 50V-6GHz-N

Connectors: N-Male/Female

Nominal impedance: 50 Ohm

Max. continuous RF power: 2W

Max. continuous RF voltage: 50V RMS

Frequency: 500kHz to 6 GHz

VSWR: ≤ 1.2

 

RF-Termination 50Ω-3GHz-25W-N

Connector: N-Male

Nominal impedance: 50 Ohm

Max. continuous RF power: 25W

Frequency: DC to 3 GHz

VSWR: ≤ 1.2

Third order intermodulation: ≤ 120 dBc

See The video using TekBox probes and TekBox TEM Cell.

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