SPX SPIDAR NIC-500s Operation Manual page 92

3) Sequencing
An extension of Concurrent Receiver Operation is the ability to provide dynamic transmitter-
receiver pairing. The transmitter-receiver pairs can follow a specific sequence, thus allowing
additional data channels with no additional hardware. In this example, channels 2 and 3 are
created with no additional hardware when compared to the Interleaved Transmitter Operation
above.
In this configuration, there are 4 channels and data is captured into four .DT1 data files. This is
a mixture of concurrent and sequencing mode.
A sequence is similar to a series of events, which gets repeated over and over. In the example
above, there would be 2 Sequences: the first Sequence would feature Tx
Sequence would feature Tx
Firing groups are used to define which receivers are listening to which transmitters in each
sequence. In the example above, there would be two firing groups. Tx
one firing group, and Tx
The table below illustrates this by showing the firing groups for each sequence:
Antenna
Tx
1
Tx
2
Rx
1
Rx
2
Data collection speed is 1/n, the total number of transmitters in the system, n.
Sequencing is only available in the NIC-500X.
Channel 1
Tx
1
Channel 4
Tx
2
firing.
2
, Rx and Rx would be on another firing group.
2 1 2
Sequence 1
1
-
1
1
Appendix A: Data Collection Modes
Rx
1
Rx
2
Sequence 2
-
2
2
2
84
firing, and the second
1
, Rx & Rx would be on
1 1 2