SMA Antenna Limit Settings (values in degrees)

Numbers in the rightmost column represent the common error-free range of all (measured) antennas.
Highlighted rows are the values relevant to astronomical observers.
These are actual values. In constrast, here are the planned/desired values.
Antenna 1 2 3 4* 5 6 7 8 Intersection
Az_CCW_Hard_Stop -177.9 # # -150.06 -177.68 # -181.37 -178.36 -150.06*
Az_CCW_Final_Limit -176.1 # # -148.12 -176.77 -177 -181.13 -176.81 -148.12*
Az_CCW_Pre_Limit -172.0 -171.96 -174.8 -144.83 -172.68 -172 ? (it may be broken) -169.46 -144.83*
Az_CCW_SCB_Soft_Limit -170.70 -170.00 -168.90 -139.57 -167.48 -170.24 -168.49 -168.50 -139.57*
Az_CCW_Soft_Limit -170.45 -174.00 -168.65 -139.32 -167.23 -169.99 -168.24 -168.25 -139.32*
Az_Rocker_1_(CCW) -132.5 # # -58.54 -87.71 -116.0 -90.0 -91.4 N/A
Az_Rocker_2_(CW) +320.4 # # +299.2 +271.71 +359.0 +267.2 +273.3 N/A
Az_CW_Soft_Limit +350.00 +350.50 +355.85 +358.24 +350.06 +349.74 +351.27 +349.74 +349.74
Az_CW_SCB_Soft_Limit +350.25 +350.75 +356.10 +358.49 +350.31 +349.99 +351.52 +349.99 +349.99
Az_CW_Pre_Limit +355.7 +358.65 # +384.11 +355.24 +354.3 +353.14 +356 +353.14
Az_CW_Final_Limit +359.7 # # +388.33 +359.34 +362.84 +357.1 +359.82 +357.1
Az_CW_Hard_Stop +362.1 # # +390.35 +361.12 # +357.31 +361.33 +357.31
El_Horiz_Hard_Stop # # 5.3 6.61 6.7 # 6.28 5.9 6.7
El_Horiz_Final_Limit 9.0 # 8.95 8.95 9.67 8.25 8.05 8.9 9.67
El_Horiz_Pre_Limit 9.9 11.89 10.0 9.999 10.58 8.95 9.06 9.72 11.89
El_Horiz_SCB_Soft_Limit 13.02 13.00 11.01 11.01 13.00 13.00 11.01 13.00 13.02
El_Horiz_Soft_Limit 14.02 14.00 12.01 12.01 14.00 14.00 12.01 14.00 14.02
El_Lower_Limit (a.k.a. "The Collision Limit")** # N/A less than 10 49.3 unset 19.94 unset 19.9 N/A
El_Zenith_Soft_Limit 87.48 87.48 87.48 87.48 87.48 87.48 87.48 86.48 86.479
El_Zenith_SCB_Soft_Limit 87.98 87.98 87.98 87.98 87.98 87.98 87.98 87.98 87.98
El_Zenith_Pre_Limit 88.6 88.5 88.4 88.4 88.5 89.0 88.4 88.5 88.4
El_Zenith_Final_Limit 89.7 89.4 89.45 89.4 89.47 89.45 89.4 89.6 89.4
El_Zenith_Hard_Stop # # # # # # # # #

*The rocker arm on antenna 4 is not installed in the standard azimuth, which needs to be fixed.

**The El_Lower_Limit is the limit above which there can be no collisions between antennas, regardless of what pads are populated. This value has not been determined, nor whether such a value even exists. Thus this limit switch can and should be ignored in the SCB software (at least for now). The tscb2 command to do so is 'pad -c off'.

encoders.conf values

Last update 2003/07/09 2003/07/22 2003/10/04 2002/12/20 2002/07/19 2002/11/07 2003/07/17 2003/12/19
Antenna Quantity 1 2 3 4 5 6 7 8
azimuth offset 149972 36802 2449831 102799 -37895 155117 -34753 -1141827
reverse 0 0 0 0 0 0 0 0
elevation offset 0 976 -106887 6980 11384 0 -4098726 3428627
reverse 1 1 1 0 0 1 1 1

Last modified: Fri Feb 16 13:44:24 2007