Specifications (Mk IV)
Host Computer
486 DX2-66 processor with 16 MBytes RAM
2 GByte hard disk and 1.44 MByte floppy diskette drive
AT-Compatible Keyboard
Graphics : monochrome LCD screen VGA 640x480 pixels
Printer port and 2 serial ports
Sealed with internal fans
Acquisition Hardware
A/D converter : 16 bit with simultaneous sampling on 8 channels
All 8 signal paths are differential
Sampling Frequency : user-selectable up to a total throughput of 160 kHz
Number of Channels : 8 at 20kHz sampling or 4 at 40kHz sampling
Receiver Bandwidth : programmable - set to 8 kHz by default for TEM
Anti-Alias Filter : 8 channel 8 pole linear phase
Amplifier Gain : programmable 0.5-1000
Input Impedance : 2.0 MW each side to ground
Maximum Input Signal Measured : +/-10V (gain=0.5); +/-5V (gain = 1)
Physical
Weight (excluding external battery) : approx 15 kg
Dimensions : 500mm x 330mm x 235mm
Operating Temperature : nominally -10°C - 50°C
Connectors :
· 8 x banana socket pairs for input analogue signals
· synchronisation cable connector (19 pin male)
· transmitter control connector (15 pin male)
· external battery connector (3 pin male)
· internal 6V battery recharge (5 pin male)
Timing Circuitry
Oven-controlled 10 MHz crystal oscillator
Programmable base frequency controls for Zonge transmitter
Programmable sampling rate controls for A/D converter
Power Supply
External user-supplied 12-24V DC battery for computer
Current drain from 12V external battery - approx 6.5A (78 watts)
Internal 6V 10 Ah sealed battery for timing circuitry
Current drain from 6V battery when timing circuitry on - approx 0.8A
Transmitter Controller
Oven-controlled 10 MHz crystal oscillator
Programmable base frequency controls to Zonge transmitter
Internal 6V 10 Ah sealed battery power supply
Current drain from 6V battery when timing circuitry on - approx 0.8A
Dimensions : 260mm x 205mm x 150mm
Weight : approx 5.0 kg
Connectors :
· synchronisation cable connector (19 pin male)
· transmitter control connector (15 pin male)
· internal 6V battery recharge (5 pin male)
Data Backup Device
Travan Minicartridge Tape System, Parallel Port Connection
Speed : nominally 5 MBytes backup and retrieval per minute
Tape Capacity : nominally 3 GBytes
6V Sealed Battery Chargers (2 Supplied)
Automatic 6V/12V selection - current limit 1.5A
Automatic detection of reversed connection