These are the serial numbers of the Diamond GPIO-MM-12 cards used in each pressure system, along with the clock rates that were determined for each card. Following the tables is a discussion of the clock rate calibration procedure. Plots of the clock calibrations are viewable as attachments.
Pressure1
board | SN | clock rate measurements | corrected clock rate clock rate used | |
|---|---|---|---|---|
0 | 302859 | 20,000,292.88 | 20,000,293 | 73 |
1 | 302828 | 20,000,450.86 | 20,000,451 | 67 |
2 | 302832 | 20,000,284.54 20,000,285 66 | ||
3 | 302871 | 20,000,072.36 | 20,000,073 | 66 |
4 | 303835 | 20,000,241.98 | 20,000,242 | 86 |
Pressure2
board | SN | corrected clock rate measurements | clock rate used | |
|---|---|---|---|---|
0 | ? | 20,000,312.39 | 20,000,314 | 314.13 |
1 | ? | 20,000,363.83 | ||
2 | ? | 20,000,352.76 | 20,000,354 | 354.37 |
3 | ? | 20,000,342.3 | 20,000,342 | 21 |
4 | ? | 20,000,347.18 20,000,347 346.47 |
Clock Calibrations
Prior to AHATS, a corrected, more precise rate of the 20 MHz clocks on each of the diamond GPIO-MM-12 cards was determined using the rubidium referenced signal generator in the NCAR EOL sounding lab.
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