SPX SPIDAR NIC-500s Operation Manual page 42

The SPIDAR screen display is shown in Figure 4-18.
The user must first select the number of sequences from the drop-down box under the blue bar.
This will control the number of sequence columns displayed on the right of the screen. In this
case, the user has selected 2 sequences, resulting in two columns (Seq1 and Seq2) being
displayed. The first sequence has the Tx on port 1 firing and both receivers listening; this is
firing group 1. The second sequence has the Tx on port 8 firing and both receivers listening
again; this is firing group 3. Notice how the Tx on port 8 is OFF during Sequence 1, and the Tx
on port 1 is OFF during Sequence 2.
There are some rules that must be adhered to when setting Sequences and firing groups:
1. Transmitters on Ports 1-4 can only use firing groups 1 and 2. Transmitters on Ports 5-8
can only use firing groups 3 and 4.
2. It is not possible to have more than one transmitter on a firing group.
3. Each element (transmitter and receiver) can only be used once per sequence.
4. A receiver can listen to a transmitter on any port. However, they must have the same
system configuration settings (time window, sampling interval etc). If these settings
differ, then receivers on Ports 1-4 can only listen to transmitters on Ports 1-4, and
receivers on Ports 5-8 can only listen to transmitters on Ports 5-8. An application of this
rule is the WARR machine, where the user could have 1 transmitter and 7 receivers. In
this scenario, all receiver settings must be the same.
NOTE: At this time, it is not possible to connect multiple NIC-500X's together
Figure 4-18: Two pairs of 500 MHz transmitters and receivers
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SPIDAR Software