© Opticstar Ltd 2019
Confirming the Working State of the Encoders
– Test C
You can use a terrestrial target to confirm that the encoders are functioning correctly, this can be
done during the day. First ensure that the telescope is reasonably level.
Select a target and use the left and right arrow keys to centre it. Hold the MODE key down for 5
sec to bring up the alternate menu. Then go to the Alt/Az screen and note the AZ value.
Now use the left and right arrow keys to slew a full 360 degrees until the target is re-centred. If the
handset display still reads the
‘same’ AZ value, the encoder is functioning as expected. High
magnification or a cross-hair eyepiece will help but is not required.
Now level the OTA using a spirit level and note the Alt value.
Use the up and down arrow keys to slew the OTA upwards until it is has moved 90 degrees; check
that with bubble level or inclinometer. If the handset display reads ~90 degrees the encoder is
functioning as expected.
Completing Tests A, B & C
If you have successfully completed tests A, B and C as outlined earlier in this document, it is
highly unlikely that there is something wrong with the telescope itself.
It is most likely that issues are related to power, the handset, firmware or simply user error. The
next step would be to ensure that:
1.
The telescope receives enough power.
2.
The handset cable socket on the handset and telescope panel are in good order with all wires
in position running parallel to each other.
3.
The handset cable has been fully inserted and has clicked in place at either end i.e. handset &
telescope.
4.
You use the latest firmware i.e. A4S4 at the time of writing (17
th
, October 2019).
5.
Check that all user settings are correct.
