Geophysical Transmitter: TXM-22

Product Details : 

TXM-22 & TXB-07: 22 kW Geophysical Transmitter and Transmitter Control Box

The TXM-22 is a highly efficient multi-purpose geophysical power source. It is designed for use in connection with the TXB-07 controller unit. The TXM-22 and TXB-07 form a powerful and flexible transmitter for geophysical applications such as Controlled Source Audio Magnetotellurics (CSAMT), Controlled Source Electro magnetics (CSEM) or Long Offset Transient Electromagnetics (LOTEM).

It can be operated in a wide frequency range between 0.001 Hz and 8,192 Hz. The output current is adjustable up to a maximum of +/-40A. The nominal output voltage is +/-560V.

The TXM-22 is powered by a 50/60Hz, 3-phase, 400V generator. In order to unleash the full capabilities of the system, a generator of min. 40kVA should be used.

The transmitter outputs are connected to 3 electrodes, thus offering the possibility to rotate the current vector in any direction. The TXB-22 uses a Pulse-Width Modulation (PWM) to control the transmitted currents. By this means it is possible to create different output waveforms such as sine wave, square wave, triangle, sawtooth, Pseudo Random Binary Sequences (PRBS) or other user definable signals. For frequencies higher than 2048 Hz the TXM-22 will transmit a square wave only.

The controller unit TXB-07 synchronizes the TXM-22 in reference to the GPS time signal. The parametrization is done with a laptop or a touch-screen computer connected to the controller box. Optionally, it is possible to record the time series of the three injected currents.

The user friendly control software provides a comfortable access to all relevant control parameters of the TXM-22.

Features

• Frequency range from 1mHz to 8192Hz
• Current vector can be rotated freely due to 3 electrode output
  
• Predefined or user programmable waveforms
• Automatic execution of job lists
  
• Recording of the 3 output currents with 24Bit A/D conversion (option)
  
• Synchronization by GPS timing signal
  
• Automatic system self-check during start-up
  
• Control via W-LAN or LAN with external computer
  
• User friendly control software
  

Technical Specifications