Справочник Пользователя для Geophysical Survey Systems Inc. 50400S

 

 

Samples per Scan: 1024 

Bits per Sample: 16 

Scans per Second: Set to 120 (recommended). 

Signal Position 

Place the antenna on the ground and use the Automatic Signal Position selection. The system will servo 
and place the direct coupling pulse at the top of the time range window. 

To test that you have the correct position, raise the antenna off the ground and you will observe on your 
system that the antenna transmit pulse will separate from the reflection from the ground. The higher that 
you raise the antenna, the further apart will be the two pulses. 

To assure that the direct coupling pulse (time zero) is recorded the user should place the signal Position 
servo in the manual mode. The signal should then be moved down in the time range window until the 
entire surface pulse is visible and there is some ‘dead time’ or flat trace visible above the direct coupling 
pulse in the time range window. 

Gain Check 

The surface pulse should be about 2/3 the width of the screen. If it is greater, reduce the Gains manually. 
If the signal appears too small you can manually increase the Gains, but the first gain point should never 
exceed 10dB, the last gain point should not exceed 65dB. 

Specifications 

Center frequency: 400 MHz 

Pulse duration: 2.5 ns 

Depth of penetration: 0-16 ft depending on dielectric permittivity  

Size of sensor: 12

126.5 inches (303017cm) 

Weight of sensor: 14 lbs (6.4 kg)