FUNcube-1 Transponder in Autonomous Mode

FUNcube-1 flight model - Image credit Wouter Weggelaar PA3WEG

FUNcube-1 flight model – Image credit Wouter Weggelaar PA3WEG

A test of the Autonomous Mode on the FUNcube-1 (AO-73) SSB/CW linear transponder has been carried out.

It was switched into Autonomous Mode during orbit 32 at 1113 UT on Saturday, November 23. In this mode the transponder will automatically switch on when the spacecraft enters darkness, and switch off again when it enters sunlight.

During the test all radio amateurs in the footprint were encouraged to make their own tests of the transponder up/down links, and make contacts.

Among the contacts reported have been:

Alan ZL2BX: Transponder switched to eclipse mode OK about mid pass over ZL. Good signals from the transponder and had a brief contact with VK2MAL.

Malcolm VK2MAL: Good signals from AO-73 over VK tonight. Stations heard through the transponder were ZL2BX Alan and VK4CBW Wal.

If you did make a contact or test please report the details as a comment on the FUNcube website at

Please note that the transponder frequencies have not yet been fully characterised.

FUNcube-1 Radio Communications Subsystem:
• 145.935 MHz BPSK Telemetry 300 mW or 30 mW when the transponder has been activated
• Inverting SSB/CW transponder 300 mW PEP
– 435.150 – 435.130 MHz Uplink LSB
– 145.950 – 145.970 MHz Downlink USB

Analysis of the telemetry data from FUNcube-1 (AO-73) is continuing. Thank you to all stations who have provided telemetry so far. More telemetry data is needed to enable the FUNcube team to characterise the satellite.

We would encourage stations to download the Dashboard software to receive the telemetry and upload it to the Data Warehouse.

FUNcube website

First Transponder Test

FUNcube-1 Deployed !!!

BBC TV visit FUNcube station at RSGB National Radio Centre