Modeling Parameter NE (Axes Non Perpendicularity 

204 

{+ }0..65535 

at the Equator), in seconds of arc. 

Modeling Parameter IH (Index Error in Hour Angle), 

205 

{+ }0..65535 

in seconds of arc. 

Modeling Parameter ID (Index Error in Declination), 

206 

{+ }0..65535 

in seconds of arc. 

Modeling Parameter FR (Mirror Flop/Gear Play in 

207 

{+ }0..65535 

RA), in seconds of arc. 

Modeling Parameter FD (Mirror Flop/Gear Play in 

208 

{+ }0..65535 

Declination), in seconds of arc. 

Modeling Parameter CF (Counterweight & RA axis 

209 

{+ }0..65535 

Flexure), in seconds of arc. 

Modeling Parameter TF (Tube Flexure), in seconds of 

211 

{+ }0..65535 

arc. 

Set Safety Limit to the actual (hour angle/east or west) 

220 

position. The Get function delivers only a hash mark. 

Feature Port Status. 4 bits (0..15) can be used for 

311 

0..15(63) 

setting input/output bits, 6 bits (two additional pure 

input bits, 0..63) are available for input.  

RA tracking rate divisor. The RA timer runs at 1.5 

MHz, using this divisor the tracking rate can be 

411 

256..65535 

adapted to the (mount dependent) speed of an object to 

be tracked.  

DEC tracking rate divisor. For DEC, no special timer 

412 

{+ }0..65535 

is available, the divisor refers to the number of RA 

steps to be done for one step in DEC.  

65535 

Reboot the Gemini controller software. 

Using the native commands:

The Identification tag is interpreted as an integer value, leading zeros are ignored.  

The checksum for the native commands is calculated by a bytewise XOR 

operation of the transmitted characters, including the Get/Set command sign ('<', 

'>'). The highest significant bit of the result is cleared (modulo 128 operation) and 

64 is added.  

Undefined Id's are ignored in Set operations. For Get operations, only a hash mark 

will be returned.  

In Debug Mode, the expected and the received checksum are displayed whenever 

a discrepancy is detected. The command with the wrong checksum will not be 

executed. 

Gemini Users Manual 

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