Vixen SPHINX SXD Mount - Manual (Page 60)

Page 61
Both the R.A. and DEC. speeds can be adjusted for
compensation.
The default values are set at 10 (1x speed) in the R.A. and
DEC..
Apply smaller compensation values for finer adjustments.
The larger the compensation values, the bigger the
motions of correction.
The values of the compensation can be set between 0 and 20 separately in the R.A. and
DEC one by one.
0 keep the celestial rate (no corrections)
1 -0.1/+0.1x of the sidereal rate
2 -0.2/+0.2x of the sidereal rate
3 -0.3/+0.3 of the sidereal rate
:
:
:
20 -2/+2 of the sidereal rate
The best suited compensation value may vary according to equipments used. Use the rate
that makes your autoguiding smooth.
When you finish the settings, choose OK and press Select to enter.
Changing the Altitude Range
The SX (Sphinx) mount is set for use in the middle latitude zone (altitude of about 35
degrees) at Vixen’s factory. If your observing site is in the lower latitude zone, below 20
degrees, or the higher latitude zone above 50 degrees, you need to alter the pre-set altitude
of the SX mount to match the latitude of your site. The range of altitude adjustment is
divided into three zones (high, middle and low latitude).
High Latitude Zone
: From 40 degrees to 70 degrees
Middle Latitude Zone : From 20 degrees to 50 degrees (Pre-set to this range.)
Low Latitude Zone
: From 0 degree to 30 degrees
(1) Remove the optical tube and the counterweights from the SX mount before you alter the
altitude of the SX mount.
(2) Loosen the altitude adjustment clamp and move the SX mount body by turning the
altitude adjustment knob to set the altitude at 35 degrees. Then, tighten the altitude
adjustment clamp.