FCC ID: WAOGCX3 Geospace Combined Recorder (GCX3)

Geospace Combined Recorder (GCX) USER MANUAL 7007 Pinemont Houston, TX 77040 USA CAUTION: Any changes or modifications to this device not explicitly approved by the manufacturer could void your authority to operate this equipment. FCC This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. The device has been found to be compliant to the requirements set forth in CFR 47 Sections 2.1091 and Industry Canada RSS-102 for an uncontrolled environment. It is expected that this equipment will generally be operated with a separation distance of at least 20centimeters between the transmitters radiating structure and the body of the user or nearby persons. Industry Canada

(English) This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device.

(French) Le prsent appareil est conforme aux CNR dIndustrie Canada applicables aux appareils radio exempts de licence. Lexploitation est autorise aux deux conditions suivantes : (1) lappareil ne doit pas produire de brouillage, et (2) lutilisateur de lappareil doit accepter tout brouillage radiolectrique subi, mme si le brouillage est susceptible den compromettre le fonctionnement. GCX User Manual 1 of 7 GCX MODULE Deployment The GCX should be deployed with the metal plate down. This provides sufficient earth grounding and maximum cooling of the unit as well as providing the GPS receiver in the top to the unit with an ideal view of the satellite constellation. The grounding spike should be fastened to the unit prior to deployment to provide maximum earth coupling. The unit should be transported on its side in order to put the unit into standby mode and minimize battery consumption prior to use. Once the unit is ready to be deployed it should be flipped spike down and the GCX will immediately begin power on self-test. The GCX will test all of its internal circuits followed immediately by an impedance test of the seismic sensors. The LED that can be seen from the top of the GCX will flash codes to indicate the GCXs condition. The GCX will enable the Global Positioning System (GPD) receiver and begin to flash the code that indicates that it is searching for satellites. Within a few seconds the GPS receiver will have sufficient satellite information to obtain a 3 dimensional fix. The flash code will change to indicate this condition and the GSR will now begin to acquire seismic data if it has been programmed to begin recording immediately. See Programming below. After several minutes the internal GSR clock will be sufficiently disciplined and the GPS receiver will be turned off. The flash code will again change to indicate this state. See the flash codes below. Radio Status Monitoring A GSR may be connected to a laptop computer and used as a hub to monitor the status of any GSRs within a 50m to 100m radius via a high frequency radio link. In this mode the laptop/hub monitors and logs status information from all of the GSRs that it communicates with. The laptop stores the GPS location, acquisition status, temperature, battery status and the nonvolatile memory status of each GSR. By moving the hub throughout the seismic spread all of the GSRs in the survey may be monitored and logged. This logging may take place during acquisition of seismic data with no adverse effect on the data quality. GCX User Manual 2 of 7 LED flashes repeatedly on solid for 1 second followed by off for one second. LED on solid for 1 second followed by 1 short pulse. LED on solid for 1 second followed by 2 short pulses. LED on solid for 1 second followed by 3 short pulses. LED on solid for 1 second followed by 4 short pulses. LED on solid for 1 second followed by 5 short pulses. LED on solid for 1 second followed by 6 short pulses. LED on solid for 1 second followed by 7 short pulses. Flash Codes GSR Start-up Error Codes Critical GSR Error:

Critical Seis Input 1 Error:

Critical Seis Input 2 Error:

Critical Seis Input 3 Error:

Critical Seis Input 4 Error:

Critical Battery Error:

Non-Volatile Memory Error:

Non-Volatile Memory Full:

GSR Run Time Codes GPS on but no GPS fix:

GPS on with GPS fix:

Recording with GPS off:

Sleeping:

Running geophone tests:

Downloading The GSR non-volatile memory may be read and cleared by removing the battery connection and inserting the unit into one of the outlets in the GeoReaper. See the GeoReaper User Manual for further instruction. Programming The GSR recording parameters such as sample rate, pre-amp gain, record mode, and testing, are programmed and stored in non-volatile memory in the GSR by the GeoReaper. See the GeoReaper User Manual for further instruction. One LED flash per second. Two quick flashes once per second. One quick flash each 8 seconds. Two quick flashes each 10 seconds. LED flashes on for 10 ms 5 times per second. GCX User Manual 3 of 7 Scalability - Unlimited number of channels Delivers high resolution data with a 24-bit delta-sigma ADC Built-in GPS receiver and disciplined clock Greater than 30 days of continuous recording Compatible with explosive, vibratory and impulsive energy sources Internal GS-ONE geophone and Extended Life Battery Built-in full resolution test generator Available as 1 or 3 channel versions LED Status/Deployment State Indicator GCX User Manual 4 of 7 Geospace Combined Recorder (GCX) ______________________________________________________________________________ Cable/Radio-Free Autonomous Data Recording Node ___________________________________________ The GCX is designed for cable-free/radio-free seismic data recording. The self-contained unit includes 1 or 3 channels of 24-bit digitization, an integrated/high sensitivity GPS receiver, built-in test signal generator, up to 16 GB per channel of non-volatile solid-state data storage, and a high-speed data port. The unit is housed in a sealed case, with internal GS-ONE geophone and ex-tended life battery. GCX System Tests The seismic channel performance and sensor tests can be performed by the GCX System. The user can choose a partial or complete set of tests that can be run in sequence and display all of the results or only the failures. In the tests described below, the system software automatically controls the Channel Input Switch Positions and Test Oscillator Settings during the tests. All tests can be run at all sample intervals and preamp gains of the GCX.

- Harmonic Distortion

- Impulse Response

- Equivalent Input Noise

- Instantaneous System Dynamic Range

- Gain Accuracy

- Common Mode Rejection

- Geophone Impedance and THD

- Crossfeed (multi-channel) GCX User Manual 5 of 7 Geospace Combined Recorder (GCX) ___________________________ Features and Spceifications___________________________ Up to 16 GBytes per channel flash memory storage Internal extended life battery Operating Temperature: -40 C to +85 C Humidity: 0 to 100%

Selectable Gains:

Sample Intervals:

- X1, X2, X4, X8, X16, X32, X64

- 0, 6, 12, 18, 24, 30, 36 dB

- 0.25, 0.5, 1, 2, 4 milliseconds recording impulsive energy sources 24-bit delta-sigma ADC 24-bit digital recorder Built-in GPS and disciplined clock 1 Hz to 1600 Hz freq. response Built-in full resolution test signal generator <20 sec. of UTC (GPS clock) Solid-state flash memory Scalability - Unlimited # of channels Greater than 30 days of continuous Compatible with vibratory, explosive and LED Status/Deployment State Indicator Internal GS-ONE geophone Available as 1 or 3 channel versions Max input signal: 1.8 VRMS @ 0 Gain Total Dynamic Range: 140 dB System Dynamic Range @ 0dB Gain:

Equivalent Input Noise @ 2 msec SI:

Input Impedance:

System Dynamic Range @ 2 msec SI Total Harmonic Distortion: 0.0005%

Common Mode Rejection: 0.001%

Gain Accuracy: 1%

Anti-Alias Filter:

GPS Time Standard: <1 ppm Weight: 6 pounds Max. Dimension: 6.125dia x 5.375h Geophone Sensitivity: 2.00 V/in/s 124 dB @ Gain 0 dB 123 dB @ Gain 6 dB 122 dB @ Gain 12 dB 120 dB @ Gain 18 dB 115 dB @ Gain 24 dB 110 dB @ Gain 30 dB 105 dB @ Gain 36 dB 1.13 V @ Gain 0 dB

.58 V @ Gain 6 dB

.33 V @ Gain 12 dB

.22 V @ Gain 18 dB

.19 V @ Gain 24 dB

.18 V @ Gain 30 dB

.17 V @ Gain 36 dB 126 dB @ 4 msec SI 124 dB @ 2 msec SI 120 dB @ 1 msec SI 117 dB @ .5 msec SI 106 dB @ .25 msec SI 20 kohms/0.06 f Difference Mode 205 kohms Common Mode Rejection @ Nyquist: 130 dB Frequency @ -3 dB: 0.83 Nyquist Linear or Minimum Phase For more information: Tel: 713.986.4444 Fax: 713.986.4445 6 of 7 GCX User Manual Geospace Combined Recorder (GCX) ___________________ GeoRes-XTC GCX Data Management System___________________ The GeoRes-XTC consists of two embedded software modules:

GeoReaper performs pre-deployment parameter programming, i.e. sample rate, pre-amp gain, record mode, testing, etc. and data collection via Ethernet connection to the Data Transfer Module (DTM) and a high speed PC. A full set of instrument tests can be performed and analyzed while the GCX is installed in the Data Transfer Module (DTM). GeoMerge allows the system to read and import all three major components of SPS (R, S and X records). It will merge all GCX data into SEG-D or SEG-2 files according to SPS X records (Cross-Reference File, sorted in the same order as the Source S File) and convert all latitude and longitude information into the same coordinates used in the SPS files. These data are then output to the field database (RAID memory) and/or hard media (tape, disk, etc.). The GeoRes-XTC is compatible with third party generated SPS files. GeoRes-XTC High Speed Computer 7 of 7 GCX User Manual