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

01/19/2010  (See other dates below)

White, Ward, Simon


Notes:

1.  Used cold LN2 box with absorber (medium size blue absorber) and 300K absorber (small size grey absorber) over feeds. All seven individual feeds are installed.  Saran wrap covers all feeds to keep dust out.

2.  All seven downconverters are installed.

3.  LO doubler is still under construction.  For these measurements, we are using the high frequency Agilent synth.

4.  For type 1 downconverter:
Fsky=23000
LO1=29300
IF1=6300

LO2=8900
IF2=2600

LO3=12700
IF3=10100

LO4=10350 fixed
IF4=250
Using 250 mhz bpf in short rack

5.  For type II downconverter:
Fsky=23000
LO1=29800
IF1=6800

LO2=16900
IF2=10100

LO3=10350 fixed
IF3=250
Using 250 mhz bpf in short rack

6.  Using Roger's hc.measTrx() python setup for taking data

7.  Beam 5 RCP cryo amp is dead.

8.  No control of cal gates.  Cal drains were set to 255 hex.  This is the lowest cal available until the new backplane is installed.

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March 8,2010 noise data readme
white, ward

1.  Used cold LN2 box with absorber (medium size blue absorber) and 300K absorber (small size grey absorber) over feeds. All seven individual feeds are installed.  The Goretex radome was installed over all the feeds.

2.  All seven downconverters are installed.

3.  LO doubler is installed.

4.  Multiplexers are installed.  2100 or 6800 mhz BPF's are installed on the multiplexers.

6.  Using Roger's hc.measTrx() python setup for taking data

7.  Beam 5 RCP cryo amp is dead.

8.  All noise cals set to 255h.

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March 09, 2010 Noise data readme
White, Ward

Notes:

1.  Used cold LN2 box with absorber (medium size blue absorber) and 300K absorber (small size grey absorber) over feeds. All seven individual feeds are installed.  The Goretex radome was installed over all the feeds.

2.  All seven downconverters are installed.

3.  LO doubler is installed.

4.  Multiplexers are installed.  2100 or 6800 mhz BPF's are installed on the multiplexers.

6.  Using Roger's hc.measTrx() python setup for taking data

7.  Beam 5 RCP cryo amp is dead.

8.  Per Glen's request, cal drains were adjusted to give a minimum cal value of ~5K.