Zonge GDP-32 - Page 59

GDP-32
II
INSTRUCTION MANUAL
May 2002 Section 5, Page 12
 Hz
Frequency selection.
NOTE: Most parameters are not registered in the computer memory until the field is exited. An
exception to this rule is the Hz (frequency) field. Whenever the frequency is changed the new
frequency is automatically changed through the timing card. However, the anti-alias filter is not
changed until just prior to data acquisition. When
Enter
is pressed to set gains or to continue
to gather data, the computer automatically sets the anti-alias filter as defined by internal look-up
tables.
 Cycles
The number of cycles to average. Increments are in binary steps from 1 to 16,384. As the
system acquires data, the cycles count is updated in real-time to the left of the number input by
the operator.
 Tx Curr
Transmitter current, up to 99.99 amps.
Additional Options:
Press
to temporarily exit the data taking routine and look at data in the Field
Data Cache. See Section 7 - Handling Data for information about Data Mode.
Press
Enter
to proceed to the next menu.
Press
Escape
to return to the previous menu, or to stop acquiring data when in the data
acquisition mode.
Press to exit the data acquisition routine and return to the main menu. When
exiting the program at this point, the main menu displays Back above to return
to the Survey Program in the event was pressed by mistake.
Press to enter the Calibration and System Checking program. See Section 6.1 -
Calibration for more details.
Press to enter the Automatic or Manual Gain Setting, SP buckout, and Repeat
Stacks routines. See Section 6.4 - Gains for more details.
Press
to buck out any self-potential (SP) or amplifier offset.
Press to enter the Contact Resistance Measuring Routine. See Section 6.3 -
Measuring Contact Resistance for more details.