TMFS - Telephone Magnetic Field Simulator

The TMFS is designed according to ANSI S3.22-2003. It is optimized for usage with the HAC Test Arch and generates a well-defined magnetic field for the reference check of the HAC T-Coil measurement setup according to ANSI C63.19. The input impedance of 600 ohm and separate connectors for supplying and monitoring the audio signal minimize the uncertainty involved by connecting the instrumentation. It is delivered with adapters for operation and calibrated for 1 kHz for the axial and radial field maxima at 10 mm scanning distance.

Frequency Range 100 Hz – 20 kHz
Nominal Operating Voltage 500 mV RMS
Coil Distance from Surface 10.0 mm from contact surface with HAC Test Arch
Input Impedance 600 ohm
Connectors BNC
Calibration Axial magnetic field maximum for 1 kHz at 10 mm

Radial magnetic field maximum for 1 kHz at 10 mm
Frequency response: 100 Hz – 5 kHz

Dimensions (L × W × H) 70 × 70 × 70 mm
Material POM

Adapter for Dipole Holder
2 BNC cables for signal supply and voltage measurement
Adapter BNC – XLR for connection to AMMI
Transportation and Storage Case
Calibration Certificate

Operation Download Technical Note (PDF, 38kB) for technical details and operation