Zonge DP-32 II Operating and installation instructions

May 2002
2. DESCRIPTION OF THE GDP-32II RECEIVER
2.1 OVERVIEW ................................................................................ 2
2.2 SPECIFICATIONS..................................................................... 3
ELECTRICAL SPECIFICATIONS .......................................................................... 4
MECHANICAL SPECIFICATIONS ........................................................................ 5
2.3 GDP-32II CASE ........................................................................... 8
CASE LID - METER AND I/O PANELS ............................................................. 10
FRONT PANEL................................................................................................ 11
CONTROL I/O PANEL (LEFT SIDE) ................................................................. 15
ANALOG I/0 PANEL ....................................................................................... 18

GDP-32II INSTRUCTION MANUAL
May 2002 Section 2, Page 2
2.1 OVERVIEW
The GDP-32II Geophysical Data Processor is a universal, multi-channel receiver designed to
acquire virtually any type of electromagnetic or electrical data within the DC to 8 kHz
bandwidth. The GDP-32II design is the result of over 25 years experience with its predecessors,
the GDP-12, GDP-16 and GDP-32. Its design emphasizes software flexibility, optimum data
quality, practicality and ruggedness for harsh field conditions.
The GDP-32II is supported by a complete set of geophysical services at Zonge Engineering.
These services include:
 Equipment sales and rentals
 Geophysical consulting and training
 Turn-key data processing
 Custom Modeling and Processing Software
 Contract field surveys

DESCRIPTION OF THE GDP-32II RECEIVER
Section 2, Page 3 May 2002
2.2 SPECIFICATIONS
The GDP-32II is designed for high quality data acquisition in harsh environments. Measurable
parameters include:
 Resistivity
 Induced Polarization (frequency or time domain)
 Complex Resistivity (CR)
 Controlled Source Audio Frequency Magnetotellurics (CSAMT)
 Harmonic CSAMT (HACSAMT)
 Frequency Domain EM (FEM)
 Transient EM (TEM)
 NanoTEM (a very early time TEM program)
 Continuous NanoTEM
 Natural Source MT
 Natural Source AMT
Programs are stored on an internal flash disk and are software-selectable. Users can also develop
custom survey applications using the C programming language. However, this is a complicated
undertaking and should only be attempted with assistance from Zonge Engineering.
The GDP-32II operates in both the Frequency Domain and Time Domain. Twenty six (26)
frequencies can be selected in binary intervals between 0.000121 Hz and 8 kHz.
The GDP-32II is designed for multi-channel data acquisition. The large case GDP-32II can
accommodate up to sixteen channels for simultaneous measurements from DC to 8 kHz.
Multiple receivers can also be used together for n-channel acquisition.
The small case GDP-32IIT accepts a maximum of 6 analog channels. These channels can be a
mixture of high-speed NanoTEM acquisition boards (BD194) and the standard analog boards
(BD183). In either case, a maximum of 3 high-speed NanoTEM channels can be installed.

GDP-32II INSTRUCTION MANUAL
May 2002 Section 2, Page 4
ELECTRICAL SPECIFICATIONS
General
 Description: Broadband, Multi-channel digital Electromagnetic receiver
 Frequency Range: DC to 8 kHz
 Numbers of Channels: 16 (maximum)
 Survey Capabilities: Resistivity, IP (time and frequency domain), FEM, MMR,
CR, CSAMT, HACSAMT, TEM, NanoTEM, AMT, MT
 Software Language: C and assembly
 Power: 12V rechargeable batteries
 Temperature Range: -40°to 60°C (-40°to 140°F)
 Humidity Range: 0 to 90%
 Time Base: Crystal clock with 5x10-10 per 24 hours aging rate
Analog Section
 Input Impedance: 10 MΩat DC
 Dynamic range: 190 dB
 Min detectable signal: ±0.03 µV
 Max input voltage: ±32V
 SP offset adjustment: ±2.25V in 69 µv steps (automatic)
 Automatic gain setting: manual override, in binary steps from 1/8 to 216.
 Signal Attenuator: Selectable 8:1
 Calibration signal generation: Internal/external
 Duty cycle selection: 50%, 100%
Filter Section
 All filters are software controlled
 Anti-alias filter, four-pole Bessel
 Quad-notch filter: 50/150, 60/180 Hz; 50/150/250/450 Hz,
60/180/300/540 Hz, or other user specified ranges
 Digital telluric filter
Analog to Digital Converter (Standard Analog Channel)
 Resolution: 16 bits ±1/2 LSB
 Conversion Time: 17 µsec
 Digitization Rate: 32 kHz maximum, per channel
 One A/D per channel for maximum speed and phase accuracy

DESCRIPTION OF THE GDP-32II RECEIVER
Section 2, Page 5 May 2002
Digital Section
 Microprocessors: 586 CPU
 Memory: 16 Mb dRAM
 Mass Storage: 32 Mb flash disk (256 Mb optional) (program and data)
Hard disk drives with capacities to 4.1 Gb.
 Serial Ports: 2 RS-232C ports (16650) standard
 Parallel Port: 1 SPP and EPP compatible printer port
 Network Adapter 10-baseT Ethernet adapter standard (1 Mb/sec)
 Crystal Clock: Optional GPS-Disciplined
 Optional Ports Mouse, CRT (VGA), standard Keyboard.
 Operating System MS-DOS and Windows-95 standard.
MECHANICAL SPECIFICATIONS
General
Large Case
 Size: 43 x 41 x 22 cm (17 x 16 x 8.7 in)
 Weight: 8-channel, 10 A-h battery pack: 16.6 kg (36.5 lb)
8-channel, 20 A-h battery pack: 20.5 kg (45 lb)
16-channel, 10 A-h battery pack: 19.1 kg (42 lb)
 Enclosure: Heavy-duty, environmentally sealed aluminum case
Small Case
 Size: 43 x 31 x 22 cm (17 x 12.2 x 8.7 in)
 Weight: 6-channel, 10 A-h battery pack: 13.7kg (29 lb)
 Enclosure: Heavy-duty, environmentally sealed aluminum case
Controls & Displays
 LCD alphanumeric/graphic display, 480 x 320 pixels (½ VGA), with viewing contrast
adjustment
 Sealed keyboard with 37 alpha-numeric keys and 30 function keys
 Analog signal meters and analog outputs
 Power Off/On

GDP-32II INSTRUCTION MANUAL
May 2002 Section 2, Page 6
Figure 2.1 - Large Case GDP-32II

DESCRIPTION OF THE GDP-32II RECEIVER
Section 2, Page 7 May 2002
Figure 2.2 - Small Case GDP-32IIT
1
2
34
5
61
2
34
5
6
25
50
25
50
25
50
25
50

GDP-32II INSTRUCTION MANUAL
May 2002 Section 2, Page 8
2.3 GDP-32II CASE
The GDP-32II is available in two case sizes. The large case GDP-32II (Figure 2.1) permits the
installation of up to sixteen analog channels for the DC to 8 kHz range. The small case GDP-32II
(Figure 2.2) permits the installation of up to six channels. The central portion of the case
contains the analog cards and timing/calibrate card. Input and output ports are mounted on side
panels. The keyboard and display are mounted on the receiver’s front panel.
1. Case Lid - Meter and I/O Panels
The case lid protects the front panel of the receiver and contains the meter/connection
panel. Three different Meter and I/O panels are available. The particular Meter and I/O
panel installed depends on the number of analog channels included in the GDP-32II. See
Figure 2.3.
2. Front Panel
The front panel contains the graphics liquid crystal display (LCD), the keypad, an analog
signal output connector, and the crystal oscillator power light. The 586 microprocessor,
hard disk, and SRAM boards are attached to the underside of the front panel. See Figure
2.4.
3. Control I/O Side Panel
The Control I/O panel, located on the left side of the GDP-32II receiver, is used to
interface the GDP-32II with external devices. It contains: a serial RS-232C port; a bi-
directional IBM-PC compatible parallel port; an external battery/charger port; an
ON/OFF button; and a transmitter control I/O port. See Figure 2.6.
4. Analog I/O Side Panel
The Analog I/O panel, located on the right side of the GDP-32II, provides connection
points for analog signal inputs, calibrator outputs, and both system and case grounds. See
Figure 2.7.
5. Battery Compartment - Large Case
The battery compartment is located on the bottom of the large case GDP-32II. It may be
removed by opening the clips holding the compartment to the main unit, and tilting it
back on its hinges.

DESCRIPTION OF THE GDP-32II RECEIVER
Section 2, Page 9 May 2002
Figure 2.3(a), (b), (c) – Meter and I/O Panels
Output
Output Output Output Output
Output
1
2
5
6
78910 11
12
13
14
15
16
3
4
1
2
5
6
78910 11
12
13
14
15
16
3
4
1
2
3
45
6
7
81
2
3
45
6
7
8
Analog Meters Binding Post Inputs, Channels 1 through 8
1
4
25
78
3
6
ZONGE ENGINEERING &
RESEARCH ORGANIZATION
TUCSON, ARIZONA USA
GROUND CASE
GROUND
BNC Connectors for Oscilloscopes Multi-Conductor MS Input 
Cable (to Analog I/O Panel)
Analog Input Port
Ground Jacks
Channel
Select
Switches
Output Output
1
2
5
6
78910 11
12
13
14
15
16
3
4
1
2
5
6
78910 11
12
13
14
15
16
3
4

GDP-32II INSTRUCTION MANUAL
May 2002 Section 2, Page 10
CASE LID - METER AND I/O PANELS
The Meter and I/O Panels, mounted on the inside of the case lids, are used for monitoring multi-
channel signals. While these panels are not required for receiver operation, they provide more
versatility in the field. Each GDP-32II is configured with an appropriate Meter and I/O panel
based on the number of channels specified at purchase.
Figure 2.3(a) shows a small case 2-channel Meter Panel. Figure 2.3(b) shows a large case 16-
channel Meter Panel. Figure 2.3(c) shows the large case 8-channel combined meter and
input/output panel.
1. Analog Meters
Zero-center. ±5 volt analog meters monitor analog channel output. The meters are used
to determine SP levels at all frequencies, and to monitor signals at frequencies below 1
Hz.
2. BNC Output Jacks
Output jacks direct the signal to an external device (e.g. oscilloscope). The output jacks
are connected to the channel select switches on the I/O panel. The monitored signal is
identical to the signal presented to the ADC on each analog board.
3–4.Channel A and B Selectors
Select the channels for Meters A and B to monitor.
5. Analog Input Port
This 9-pin “D” connector connects the meter panel with analog voltages from the main
chassis.
6. Channel Input Connectors
The analog binding posts provide a convenient method for connecting up to eight receiver
channels to external signals.
7. MS Connector Cable
Connector cable for attachment to the Analog I/O panel.
8. Ground Jacks
An analog ground reference post and a case ground jack.