Lacerta M-Gen User Manual page 49

Guiding parameters page (RA and DEC: 3/5 and 4/5)
5.1.10.3
The next two pages have the same items, one page is for the RA and
one for the DEC axis' parameters. These settings are independent for the
axes. These parameters define the guiding behaviour of an axis. The
parameters can be experienced with time and should be only trimmed
later for some fix guiding configurations.
The items for an axis:

Num
: (decimal, 1...99) profile
The number of frames (or star positions) that should be averaged before a new
correction signal is calculated and sent to output. With this item it is possible to lower
the correction frequency or to increase the effective integration time.
For the RA axis this value is generally 1 causing no averaging and calculating
correction signal after each new frame. For the DEC axis the averaging may be used,
because there must be only low and constant drifts here. Averaging avoids chasing the
seeing on DEC.
Disabling DEC axis:
On DEC only, this value can be set to zero. Doing so You tell
the guider ignore this axis. Calibration will do run only for RA
axis, DEC vector is set by rotating the RA result vector 90
dergees right and so giving always 100% ortho. value.
If DEC is disabled, it is indicated as shown here. The DEC drifts are not shown but are
still being measured.

tol.
: (real, 0.01 ... 9.99 pixel) profile
Abbreviation for "tolerance". This is a threshold value in both directions to the center
(zero drift) that means an interval in which the device handles the drift with
'tolerance'. There are more modes of behaviour inside the tolerance interval, which is
described later.

aggr.
: (decimal, 1...200 %) profile
Abbreviation of "aggressivity". This is a scalar factor that multiplies the calculated
correction signal's length. This item trims the guiding "strength", avoids oscillation
and compensates other anomaly (a wrong calibration) if set carefully.
At manual guiding parametrization (no calibration data is present) this allows the User
to set RA correction signal lengths according to the objects DEC coordinate. That's
why the value is allowed to be over 100%.
Note: with calibration, using long exposure time (over 1 second) the typical value is
70-100%, using shorter correction frequency requires to lower this value to overcome
oscillation around the zero drift point. Be careful not to chase the seeing, use as much
integration time as many Your mount's tracking error allows.

mode
: (decimal, 0...2) profile
Some different guiding policy is available, this can be given by this item. These are:
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