NATURAL SOURCE MAGNETOTELLURICS
Section 13, Page 3 May 2002
13.2 FIXED FUNCTION KEYS
One of the differences between the GDP-32
II
and its predecessor, the GDP-32, is the addition of
six fixed function keys located below the six soft function keys ( through ) at the
bottom edge of the LCD.
These keys are activated with the same menus as before, and are denoted as follows, from left to
right:
By pressing this key you enter the field data cache and can view data, escape back to
other menus to initialize or view other data caches, or output data to a PC from the
data caches. See Section 7 for more details.
Exit the data taking routine and return to the main menu for selection of other
programs by pressing . When exiting the program at this point, the main
menu will display Back above the function key to enable the operator to
return to the AMT program, if desired.
Press this key to enter the calibrate and system checking program. See GDP Section
6.1, Calibration for more details.
Press this key to enter the automatic or manual gain setting and SP buckout menu.
Note: The MT/AMT program is the only one that automatically enables the front-end gain
stage (G0). For the best results with natural source MT/AMT, always permit the
receiver to use G0.
Pressing this key will automatically buck out any self potential (SP) or amplifier
offset, for any channel that is turned on.
Press this key to measure the contact resistance or coil output resistance. See GDP
Section 6.3, Measuring Contact Resistance for more details.
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