Transmitter-Receiver System

Crone's Pulse EM system is designed to be safe, accurate and reliable while maintaining portability and versatility. These crucial components are essential for any Pulse-EM survey and must be rugged enough for all field conditions. Advancements in automation have reduced setup time and improved data quality across all PEM surveys.

Transmitters and Receivers

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20kW HP Transmitter

20kW HP Transmitter
8.33ms - 1000ms timebases
30Hz - 0.25Hz base frequency
500, 1000 or 1500us controlled linear turn-off ramp times, including “fast ramp” option
Ideal for single or multiturn loops
Up to 60 Amps at 1000V
Integrated damping control (eliminates ringing for clean early time responses) of the loop, current display monitoring and recording for data QA/QC
Fully programmable waveforms, 50% duty cycle with linear turn off ramp, 100% duty cycle, other
Automatic and manual shut-off safety features
Portable and standard motor generator power supply

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4.8 kW Transmitter

Portable Transmitter (Tx) unit for Surface, Borehole and Underground Pulse-EM surveys

Up to 30amps in single (4.8kW) Tx mode large loop

configurations

Dual (9.6kW) Tx mode for up to 60amps in parallel, and 30amps in series large loop configurations

Cable or clock synchronization
Extreme weather, and temperature rating of -40C to +50C
Safety features including automatic shutoff
Powered by a standard motor generator
Automatic, accurate monitored current control for consistent current throughout the survey

Accurately controlled linear ramps with 'Fast Ramp' shutoff, 0.5ms, 1.0ms, & 1.5ms

Time bases: 8.33ms to 1s (30Hz to 0.25Hz)
50Hz or 60Hz filters for cultural noise through stacking
Auto loop damping with waveform monitor and current recording

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PEM CDR4 Receiver

24-bit ADC resolution
Full waveform, stacked and time-series data recording
Up to 4 Channels for simultaneous multi-component recording
100kHz high speed sampling, 50kHz bandwidth
+/-10V input range
Precise timing and automatic synchronization
Extreme weather and temperature rated from -40C to +50C
Sunlight readable, high resolution, rugged LCD touch screen with graphic display of decay and profile plots
Up to 14 hours of surveying on a single charge
Proven Crone ‘tower’ case design, backpack mounted for portability and ease of use
Crone Smartstacking for highest data quality and maximum production. Spike and noise rejection
Optimized for all Crone Borehole and Surface PEM systems
All aluminum housing with rugged connectors, switches and keyboard
Step Transformation available for both dB/dt & B-Field Data
Automatic Gain Control