Measurement Systems: Complete Solutions with Bluetest Reverberation Chambers
The economical, portable and lightweight Bluetest chambers quickly generate accurate antenna measurements traditionally achieved in larger, more expensive far-field or near-field ranges using anechoic chambers. Bluetest reverberation chambers are particularly well suited for measuring wireless phones in the 'talk position' near a phantom head to determine the effect of the human body on antenna propagation.
Measurement Accuracies and Times
Each Bluetest reverberation chamber comes with software to control chamber operation as well as test instrumentation. The mode stirrers can be run in different sequences. The times shown in the accompanying table are representative of a Bluetest HP chamber collecting all power samples within the frequency band. Note: time reference level calibration (set once per project) is not included in the table. Total accuracy and frequency resolution will depend upon the instrumentation chosen, test frequency, chamber size and test sequence. Faster measurements are possible with reduced accuracy.
| Measurement | Erad | TRP | TIS via AFS |
| Time | 1 Min | 1 Min | 5-10 Min |
| Standard Deviation | 0.5 dB | 0.5 dB | 1 dB |
| Frequency Resolution | < 5 MHz | Single Channel | Single Channel |
Erad = Radiation Efficiency
TRP = Total Radiated Power
TIS = Total Isotropic Sensitivity
AFS = Average Fading Sensitivity
Variety of Stirring Methods for Accurate Measurements
- Two Fast Plate Stirrers
- Additional Platform Stirrer
- Full Polarization Stirring (three antennas)
- Frequency Stirring
Available Software Modules
- Radiation efficiency, Diversity gain
- Radiated Power, Receiver Sensitivity
System Requirements
Windows XP PC with:- RS-232 interface for controlling chamber functions
- Proper communication interface for controlling instruments, such as GPIB (IEEE-488.2) controller card
- Network analyzer for calibration and passive antenna measurements
- Pulse power meter and/or base station simulator/emulator for TRP measurements. The power meter can be a spectrum analyzer operating in zero span mode
- Mobile communication test instrument for measuring power and Bit Error Rte (BER) of terminals of different wireless systems
- Cables for connecting customer-provided instruments to the Bluetest chamber and PC
Included Components
- Bluetest User Manual describing how Bluetest chambers can be used for measuring radiation efficiency, free space impedance and radiated power
- Basic software modules for controlling the chamber and user-specified network analyzer
- Control electronics for plate and platform stirrers (step motors) and polarization switch (RS-232 Serial Interface, 9-pin female connector)
- Cables to connect network analyzer to the chamber, and to connect the AUT to the connector on the mounting platform inside the chamber
Additional Components Available to Meet Your Test Requirements
- Installation of hardware and software service
- Full-day training for new Bluetest operating personnel
- Software modules for testing active terminals
- Wideband disk-cone calibration antennas (700 MHz - 3.5 GHz, 3.0 GHz - 6.00 GHz)
- Dielectric cylinder with support which can be filled with a lossy liquid and used in the same way as a phantom head. Directions for making a suitable lossy liquid are provided without charge
- Support for calibration dipole and mobile phone
- Dielectric foot for mounting phantom head
- Phantom head
- Phantom hand
- (800-1900 MHz) tissue-simulating liquid
