add some docs

mission/com/CcsdsIpCoreHandler.h

@@ -36,6 +36,10 @@ struct PtmeGpios {
  *          programmable logic of the Q7S.
  *
  * @details
+ * From a system view, OFF means that the transmitter is off, on means that the transmitter is on.
+ * The handler will only take care of the IP configuration, the actual swithing and configuration
+ * of the COM hardware (Syrlinks for the EIVE project) will be done in a separate device handler.
+ *
  * After reboot default CADU bitrate is always set to 100 kbps (results in downlink rate
  * of 200 kbps due to convolutional code added by syrlinks transceiver). The IP core handler exposes
  * a parameter to enable the priority selection mode for the PTME core.