Appendix A: Data Collection Modes - SPX SPIDAR NIC-500s Operation Manual

Appendix A: Data Collection Modes

The NIC-500 data collection modes are described below.
1) Interleaved Transmitter Operation
With Interleaved Transmitter Operation, multiple transmitters can be fired simultaneously. This
enables multiple Transmitter-Receiver pairs (channels) to have concurrent data acquisition
when time windows are shorter than 10,000 ns.
Channel 1 and Channel 2 are collected simultaneously.
The GPR data is captured per channel, so the data is stored into two DT1 data files. The
channels are synchronized to avoid interference. Data is collected in parallel so there is no
reduction in speed no matter how many channels are connected.
Interleaved Transmitter Operation is the default mode for the NIC-500N and NIC-500P. It
is also available for the NIC-500X.
2) Concurrent Receiver Operation
With Concurrent Receiver Operation, multiple receivers can collect signals from one transmitter
simultaneously.
Channel 1 and Channel 2 are collected simultaneously.
In this configuration, there are still two channels and data is captured into two DT1 data files.
The receivers are listening at the same time, so data collection is in parallel and there is no
reduction in speed no matter how many receivers are connected.
Concurrent Receiver Operation mode is only available in the NIC-500X.
Channel 1
Tx
1
Channel 2
Tx
2
Channel 1
Tx
1
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Appendix A: Data Collection Modes
Rx
1
Rx
2
Rx
1
Rx
2