3.3 SAT AND SAT-ALARM UNIT CONFIGURATIONS
Two SAT Units on the Same NODE
One SAT unit can generate 16 possible alarms. Each alarm results in a 9760 system alarm if the SAT alarm is assigned a System Alarm number in the SAT ALARMS file (see Section 2, Alarm Programming Menu-Page 1 of 1).
Moreover, each System Alarm number (on the SAT SIDE) corresponds to the same number in the Physical Number column of the ALARM configuration file (on the 9760 SIDE).
If two SAT units are connected to the 9760 system, 32 possible alarms notifications can be generated by the SAT SIDE and passed on to the 9760 system. Theoretically, it doesn’t matter which numbers (of those available) you pick to use as System Alarm numbers as long as you do not repeat any number among the total used by all SAT units and ALARM units combined. We shall discuss 9760-ALM units mixed with SATs shortly, but first consider two SAT units on the same node.
The portions of the SAT Alarms menu and the 9760 ALARM configuration file that relate to our discussion are shown below in Figure 3-25. Even here, you can see that there are different ways of configuring the menus involved. Usually, the simplest is the best. Here, the simplest is to associate the first 16 (1-16) System Alarm numbers with SAT 1 and the second 16 numbers (17 to 32) with SAT 2. The associated Physical Number column’s range in the 9760 ALARM configuration file runs from 1 to 32 (1-16 for SAT 1 and 17-32 for SAT 2).
(The Simplest)
Figure 3-25
SAT Alarm Configuration – Two SATs
For each 9760 Physical Number (1-32) in the configuration file, an associated Logical number is assigned. The Logical number is used to ARM the alarm from the 9760 keyboard. Each Physical Number (or defined alarm) is also associated with a Logical camera number in the Alarm Camera Switcher sub-window of the 9760 Alarm configuration file (see Section 3, 3.2 9760 System-SAT Alarm Response ). The camera referenced there will be called by the 9760 when the associated alarm is triggered. The logical camera numbers, which in this case are SAT satellite cameras, are port specific with respect to the SAT unit that they belong to. That relationship, in turn, is determined by the configuration of the Link Cameras configuration file (see Section 2, 3.3 Link Cameras File).
Once configured, alarm response for each alarm occurring on any unit is the same as that already described in the previous section.
