GDP-32
II
INSTRUCTION MANUAL
January 2003 Section 8, Page 8
The Data Acquisition Screen below is displayed when:
Channels 1 and 2 are turned ON.
The battery voltage has been measured and the A/D converter automatically
calibrated before each measurement cycle.
Gains are set automatically (default).
Screen Explanation
G0,G1,G2 - Gain stages 0, 1 and 2. Stages 0 and 1 set to unity, stage 2 set for 32.
Atn - Set to OUT (bypassed)
SP - The SP buckout values are 3.24 mv for Channel 1 and -4.09 mv for Channel 2.
GGG - Gain settings for stages 0, 1 and 2 (in powers of 2). For this example, gain stages
0 and 1 = 2
0
= 1 and gain stage 2 = 2
5
= 32.
The program first sets up the Gains, bucks out the SP and then begins gathering data.
Since we are operating in the default or "Noisy" gain mode, all of the necessary gain is
put into G2 first. For more information on setting gains see Section 6.5.
0207 RPIP0613 11.7 08 Jan 18 13:47:24
Survey D-D
Tx 1 Rx 3 N OUT
.125 Hz 4 Cycles Tx Curr 1
CH N G0 G1 G2 Atn SP GGGA
1 ON 1 1 1 1 OUT -7.14 005O
2 ON 2 1 1 1 OUT -3.85 005O
3 OFF
4 OFF
CONT-Set gains, ESC-Prev. menu
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