Thermal calibration data for the K-band focal plane array receiver.  Single pixel.

9/26/2008
Norrod

Notes:

1.  Used cold LN2 box with absorber (medium size blue absorber) and 300K absorber (small size grey absorber) over feed. 

2.  Using the freq doubler (without high pass filter between doubler and downconverter) for LO1, so LO1 frequencies are 1/2 the actual LO1 frequency.
Formula: (Fsky+6800)/2=LO1
LO2 set to 8900 Mhz fixed

3.  Measurements done using rx, short rack with test converter, HP power meter, and python program.

4.  The band is broken in half:  
1st band:  17.6-22.6 Ghz, 26 data points, k176226.lst
2nd band:  22.8-27.8 Ghz, 26 data points, k228278.lst

5.  Used 80K for cold temp.  Used 298K for hot load temp.

6.  300/40 filter in the total power box.  The power meter head (model 8481D, s/n SG41090162) was just after this filter.