Imaging frequencies	156 ÷ 2500 kHz
Number of simultaneous measured frequencies	up to 4
Survey depth	100 ÷ 3000 m
Borehole spacing	up to 800 m *
Tool diameter	42 mm
Borehole requirements	no conductive casing **
Type of transmitter and receiver	electrical
Transmitted power	1 W
Dynamic range (no tool motion)	120 dB
Noise level (no tool motion)	0.3 nV
Dynamic range (during tool motion)	95 dB
Noise level (during tool motion)	5.0 nV
Hoist engine power	2 or 3 kW
Hoist power requirements	12 or 18 A 220-240 V AC
Tool motion speed during the survey	2 m/s
Continuous operation time	up to 6 hours ***
Phase measurement	Yes
3-Dimentional tomography	Yes