Celestron NexStar 80SLT Manual del protocolo de comunicación - Página 2
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GOTO precise AZM-ALT
Sync
To Sync to an object via serial commands, the user should center a known object in an eyepiece. Then the Sync serial
command should be sent, using the celestial coordinates (RA and DEC) for that object. This causes future GOTO or
Get Position commands to use coordinates relative to the Sync'd position, improving pointing accuracy to nearby
objects. (we probably don't need to mention "from the planetarium package" since it also improves pointing accuracy if
they GoTo objects via the hand control.) The format for the RA/DEC positions in the Sync command is identical to the
GOTO RA/Dec command.
Command Function
Sync RA/DEC
Sync precise RA/DEC
Tracking Commands
The following commands retrieve or set the tracking mode.
Depending on the mount type, following tracking modes are available:
0 = Off
1 = Alt/Az
2 = EQ North
3 = EQ South
Note: On the CGE and Advanced GT hand control versions 3.01 through 3.04 the value for EQ North is 1 and EQ
South is 2. This has been corrected to match the other models in current hand control versions.
Command Function
Get Tracking Mode
Set Tracking Mode
Slewing Commands
The following commands allow you to slew (move) the telescope at fixed or variable rates.
For variable rates, multiply the desired rate by 4 and then separate it into a high and low byte. For example if the
desired tracking rate is 150 arcseconds/second, then:
trackRateHigh = (150 * 4) \ 256 = 2, and
trackRateLow = (150 * 4) mod 256 = 88
For fixed rates, simply use a value from 1-9 (or 0 to stop) to mimic the equivalent hand control rates.
Note: in most configurations, issuing the slew commands will override (or conflict with) the tracking mode of the
mount. Hence it is always best to disable tracking first using the Tracking Commands, issue the slew command, then
re-enable tracking. The main exception to this is when tracking equatorially - the fixed rate slews at 1 or 2 will not
override tracking. This can be useful to simulate autoguiding.
Note: on GT models, the fixed rate slews at rate 9 move at 3 degrees per second instead of the maximum rate.
"b12AB0500,40000500"
PC Command
"S34AB,12CE"
"s34AB0500,12CE0500"
PC Command
"t"
"T" & chr(mode)
"#"
2.2+
Hand
Applies to
Control
Versions
Response
"#"
4.10+
"#"
4.10+
Hand Control
Response
chr(mode) & "#"
"#"
Applies to
Versions
2.3+
1.6+