Comparison of the receiver noise temperature measured at NOVA and at OSF vs. LO frequency. The data from the produced Band 5 cartridges have been averaged over polarization channels, IF bandwidth and the sidebands at each location. The solid black line shows the specification (75 K) where the receiver noise temperature must be below at all frequencies within the RF band of 163–211 GHz. The dash black line shows the specification (55 K) where the receiver noise temperature must be below at 80% of frequencies within the RF band of 163–211 GHz. The green solid line is the value averaged over 73 cartridges measured at NOVA and the blue solid line provides averaged noise temperature measurements performed at OSF. Lower operational temperature of the FE cryostat (3.5 K, OSF data compared to 4 K @cold plate NOVA data, Fig. 12) manifests itself with significantly lower receiver noise temperatures around 33 K single sideband. The gray arrow in the plot points toward the range of the better performance.