Q) What is meant by the statement that a satellite is operating in "mode U/V"?
A) The satellite uplink is in the 70 cm band and the downlink is in the 2 meter band
NJ2X Notes:
70 cm is considered UHF while 2 m is considered VHF. Hence, the U/V designation indicating UHF (70 cm) / VHF (2m).