SIE Style Surface Panel Setup Tricks
oscilloscope at .1 ms/div (100 Ásec/div), .1, .2, or .5 volts/div, external trigger (EXT/10), and negative trigger slope. (The foregoing assumes a
Tektronix T922R scope.)
Adjust the amplitude GAIN to show attenuation of collar amplitude to about 50% of free pipe signal. Insufficient gain will appear as excessive collar attenuation on the log. See Table B below.
Adjust T2 to stay on the first negative arrival down to 5 or 10 millivolts on the recorder scale. The transit time "floating gate" will thus trigger on the first arrival larger than said setting (see
T2...The Easy Way for details).