---
# System prepended metadata

title: '02.08.22 : Post-Recovery COM Test Protocol'

---

# 02.08.22 : Post-Recovery COM Test Protocol

- 16:18
    - With assistance of Zeyu removed COM-board from the gondola (recorded by Bence)
    - attached a Debug antenna to the COM-board
    - ![](https://i.imgur.com/TiLOpI5.png)

- 17:01
    - Connecting COM-board with power supply (balloon application flashed on SSB)
    - ![](https://i.imgur.com/HSIUEIE.jpg)
    - ![](https://i.imgur.com/1kh9UW0.jpg)
    - Watching GQRX-Spectrum and observing a peak at around 436987 kHz every 1 min
![](https://i.imgur.com/lQzNnTL.png)

- 17:31
    - Trying to decode data with [gs-gnuradio docker](https://gitlab.lrz.de/move/software/docker-images/-/tree/feature/add_gs_gnuradio_dockerfile/gs-gnuradio) image
    - ![](https://i.imgur.com/WK8Prhf.png)
    - kiss packets are piped into a TCP socket by the GNU radio program
    - we listen with `nc localhost 8001 | stdbuf -i0 xxd -ps` and it outputs the following (a callsign frame):
    - ![](https://i.imgur.com/j8xxhYG.png)
    - receiving a callsign frame every minute. Beacons aren't sent as CDH is not connected

- 19:10
    - COM-Board put back in Cave
    - ![](https://i.imgur.com/rZcrHqg.jpg)
