In these two open cabinets are the on-air transmission hardware and the duplicate standby system, which are ready to take over transmission within seconds. The equipment in the closed cabinet on the right is mainly used for monitoring. The chart on the module halfway up the rack shows the modulation of the live satellite signal uploading the FLO TV channels. Although the engineers also monitor this from inside the network operations center, it’s important to be able to see it here as well if they’re doing maintenance work on any of the transmission equipment.