SEDSAT-2 Requirements Communications
From SEDSWiki
Communications shall transmit a beacon every 2 minutes
A hello-world type message will be transmitted periodically to aid in locating the satellite.
Communications should be able to take over if CDH fails
This refers to acting as a link from the ground (and the manual controls from there) to the rest of the satellite, eg. through manually relaying commands from ground onto the SEDSAT-2 I2C bus.
Resetting the rest of SEDSAT-II through Communications
Manual reset from ground routed through Communications
Communications Powers up x minutes after deployment
In case any other component in SEDSAT-2 doesn't survive launch, Comms must still be able to power up on its own, without an external "power-up" signal.
Communication transmit path will power down when not transmitting
Communication receive path will always be powered
Communications relays uplink commands to CDH
Communications relays downlink commands/data to ground
Communications shall be directly connected to a secondary/backup power supply
Communications must operate in a temperature range of zero degrees to 70 degrees Celsius
0-70 degrees Celsius is the typical operating range of most discrete components.
