HMC1023 Noise Figure vs. Gain

Note that there are only two discrete gain settings for the HMC1023 - nominally 0 dB (min. gain) and 10 dB (max. gain), as set by bit [4] of Register 02h, but no possible gain settings in-between.  Table 1 of the datasheet (p. 2 in v01.0113) lists noise figure as a function of these two gain states and two exemplary source impedance values (100 Ohm and 1 kOhm), ranging between 12 dB and 25 dB.  The front page of the datasheet advertises 10 dB as highlighted by Eamon - presumably in high gain, but at what input impedance?

Figure 6 on page 4 of the datasheet shows the Noise Figure for 1kOhm input impedance.

It is a little less than 10dB for the maximum gain setting (10dB) and 19dB for the minimum gain setting (0dB).

Thanks. I missed the fact that the device has just two gain settings.