Hello again,

Another pass (2009-02-28 2225 UTC) and the 70cm beacon was on again. This time I used fldigi and worked out it was sending RTTY at 45 baud. Using a 85Hz shift gave strings of digits that made the pattern -xxyyy-xxyyy-xxyyy where xx is the channel number (it incremented from 00 to 59) and yyy is the value. Going through the data table from the December 1974 AMSAT newsletter (Thanks again Phil Karn) gives:

Channel Values OK My reckoning from the table 00 366 Y PA temp 70/2 transponder off 01 918 917 Y +X current -14.1mA 02 871 892 Y +Y current 27.9mA 03 637 753 Y -X current 334mA 04 870 744 Y -Y current 354mA 05 010 105 Y +Z axis sensor 84deg 06 911 Y +X current -14.1mA same as 01 07 881 906 Y +Y current -2.6mA 08 00000 00000 N All x8 channels are not working 09 906 779 Y -Y current 279mA 10 000 000 Y -Z axis sensor 90deg 11 769 770 Y Battery volts 14.1v 12 337 338 N Half battery volts 3.53v 13 711 715 Y Regulated volts 24.31v 14 602 602 Y 10v Reg volts 9.38v 15 937 937 Y 9v reg volts 9.37v 16 416 421 Y Ch reg1 volts 6.51v 17 393 395 Y Ch reg2 volts 6.06v 18 10000 10000 N see 08 19 149 149 N 2304 beacon pwr 20 484 484 Y Ch. Disc current 60.3mA 21 913 912 Y +X current -3mA 22 894 902 Y +Y current 6mA 23 N 24 845 728 Y -Y current 389mA 25 010 094 Y +Z sensor 84.6deg 26 889 888 Y +X current 47.2mA 27 878 883 Y +Y current 40mA 28 20000 20000 N see 08 29 867 750 Y -Y current 341mA 30 000 000 Y -Z sensor 90deg 31 000 000 Maybe 10m RF output 0W 32 000 000 Y 2m RF out 0W 33 467 472 Y 70cm beacon out 258mW 34 000 000 N Total solar array current 35 238 238 N Battery temp formula truncated 36 238 247 N Baseplate temp formula truncated 37 258 273 Y +X facet temp 53.2deg 38 30000 30000 N see 08 39 259 258 N 2304 beacon temp 40 501 501 Y Midrange telemetry cal 5.01v 41 915 915 Y +X current -9.8mA 42 911 912 Y +Y current -15.6mA 43 684 -X current 482mA 44 N 45 020 Y +Z sensor 88.9deg 46 294 Y +X current 1350mA 47 916 916 Y +Y current -24.3mA 48 40000 40000 N see 08 49 N 50 000 Y -Z sensor 90deg 51 767 Y Battery volts 14.12v 52 331 N Half battery volts 3.48v 53 009 N AGC level 70/2 transponder 54 000 N Tx osc 70/2 transponder off 55 000 N Rx Osc 70/2 transponder off 56 000 N Mod out 70/2 transponder off 57 58 50000 N see 08 59 855 855 Y Conv. Osc 70/2 9.50v Missing numbers were corrupted. The values were from two frames. The second value is the preferred value used in the calculations.

Comments: Judging from parameter 40, the calibration is still ok. Any parameter in the x8 series is not working. The temperatures are out of range. I don't know about the Zaxis sensors. Is -Z in shadow?

AO-7 still continues to surprise.

73 de David VK5DG