1st LO: tunable with Racal-Dana synthesizer. Highest frequency for the RD (F_RD) is 1.3GHz. Subsequent frequency multiplication x4 and a harmonic generator (20th harmonic) allows for higher LO frequencies.

2nd LO: Fixed at 6.6GHz

Calculation of the 1st LO frequency:
F_LO = F_Sky +6.6 GHz -0.1GHz

normal GMVA setting:
F_sky = 85.5 GHz (center freq)
=> F_LO = 92 GHz
=> F_RD = 92 / 4 / 20 = 1.15 GHz