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Calibrating NEW *Touch Memory* Device.                    HOME

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This is the procedure I used after replacing *touch memory* that was in service since 1993,  device #  DS1992L F5.

1/ The first thing you need to do is using the *front* panel encoder, regardless if you have the  S1-100 from US Digital, or as I used a 256 counts per revolution device from a TS-850. I suggest this should be done right away.

2/  Hold down the AZ Switch on the front panel of the control box. Rotate the built-in Encoder for a display of  *0*  (Zero), now carefully rotate the encoder until you reach 360Deg and count every turn made, in my case it is 130.5 rotations for AZ.

3/ Now when you replace the *touch memory* use these same numbers to do a complete calibration as if you were rotating the Dish/Array 360 degrees......Works Great.

4/  EL is a bit different.  All you really care about is deriving 1800 Quadrature pulses for 360 degree calibration. You can NOT use the screen display since it will not do beyond 179.99 on the display.

NOTE:   The Inclinometer is called T2-7200, and how they do this is by counting the rising and falling edge of both the "A " & "B" pulse train, there  1800 X 4 = 7200.

If you are using the S1-100 then you know that 18 full rotations are required for front panel calibration.

I my case, since my front panel device is 256 counts.   1800/256 = 7.03 rotations, I settled for exactly 7 rotations the using *corrections* file in F1EHN to adjust the difference, in fact I did not have to touch it since you are only using 90 degrees on EL, that slight difference/error did not show up.

I strongly recommend that you determine the rotation required for your AZ be done NOW, hi hi.

Regards & Good EME,    Darrell  

Regards & Thanks, Darrell -- VE9DW on EME.

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