The following calibration devices are available:
- Calibration swing arm
- White light source (mounted at calibration swing arm)
- Diode source (mounted at calibration swing arm)
The following options make sense for controlling the calibration devices:
- The intuitive location because the OSS TCS subsystem is responsible for swing arms in general.
- All instruments are able to use the calibration devices via TCS.
- The TCS software engineers are forced to write low-level device drivers
- The Arbitrator provides a central interface for accessing the calibration devices. It is possible to have a ICE interface to maximize accessibility.
- The Arbitrator coordinates the calibration devices.
- The arbitrator uses proven low-level device drivers.
- The Argos workstation with the Arbitrator needs to be powered up.
- It is mandatory that one Arbitrator runs for every telescope side.
Calibration Subsystem CAL
- The calibration subsystem CAL will have a similar state machine like the other subsystems like LAS and LGSW.
- The calibration subsystem can provide via an ICE interface access to the devices for other instruments.
- No Argos Arbitrator is mandatory.
- The other instruments must get to know the subsystem state machine.
- The Argos software engineers will spend a lot of time to write this subsystem.
- It is required that the Argos workstations are powered up.
Direct Access To The Devices
- No supervisor program is necessary, i.e. no programming work for Argos software engineers. Other instrument groups can find the manuals for writing low-level drivers on this wiki.
- Every instrument group is forced to develop low-level drivers by their own.