Seismic Source DAQlink III - Device Acquisition Menu - Advance Mode

34 User’s Manual
4.3.1 Device Acquisition Menu – Advance Mode
This menu allows the user to setup the acquisition parameters for the selected DAQlink
III unit. Up to 24 channels per DAQlink III unit are shown. The DAQlink III unit automatically
checks the number of operating channels when the unit is reset.
The channels must be enabled to acquire data. A check mark shows that the channel is
enabled.
The end user can change the name field.
The type field should be set to generic unless acquiring data from a servo hydraulic
vibrator. When performing quality control tests on a servo hydraulic vibrator it is very important
to select the correct “type’ for each channel.
Gain – 2 preamp gains can be selected (x1, x16)
Input – Should be set to Normal
• Normal for Normal operation
• Loopback is used for testing.
• GND is used for testing. Connects inputs to Ground for measuring
instrument Noise Level.
Units and Scale used to display the Y axis in different units than volts. These settings are
allowing the display to be modified for different units. Normal entry is volts. For velocity
studies and strong motion, the display can be changed to show velocity or any other unit.
Same Settings in all Channels – clicking this will copy all of the highlighted settings to
all of the other channels
Standalone button should be checked, when DAQlink III is acquiring data in standalone
mode. In this mode, the DAQlink III stores the data to the internal compact flash memory. It
does not require a computer to be connected to acquire data. After the data is acquired, the
DAQlink III is reconnected to a computer running the Vscope program, and the data from the
internal compact flash memory can be downloaded to the computer.
Figure 4.3.1 Device Acquisition Menu
Low Cut Filter – This selection enables the Low cut Filter in the DAQlink III unit.
Normal setting for Seismic Acquisition is 2 Hz. This is a single pole filter with 2 Hz being the 3
dB point.