This video shows Simon 2E0HTS carrying out a signal test on the FUNcube-1 AO-73 CubeSat, he gets a good signal back from the satellite.
During weekday daylight hours the satellite is in Educational Mode transmitting a strong telemetry signal with science data for schools to receive. On weekday evenings, when the satellite is in darkness, and throughout the weekend the FUNcube SSB/CW transponder is activated. SSB contacts can be made with as little as 5 watts.
To minimize Doppler shift the satellite uses what is known as an Inverting Transponder, this means you transmit lower sideband (LSB) in the 435 MHz band and receives upper sideband (USB) in 145 MHz.
Watch Ham Radio – FUNcube AO 73 Signal check
• 145.935 MHz BPSK Telemetry 30 or 300 mW
• Inverting SSB/CW transponder 300 mW PEP
– 435.150 — 435.130 MHz Uplink LSB
– 145.950 — 145.970 MHz Downlink USB
Educational Telemetry beacon is 300 mW during day and 30 mW at night.
The Transponder is only active during weekday night passes and at weekends.