Software Bisque Paramount ME - Apply PEC Correction; Recorded Table Group; Copy

Paramount ME User’s Guide
70
Click Yes to save the PEC curve to the control system’s memory. The control system now
permanently stores the PEC table and can use it to reduce the effects periodic error while
tracking. If you’re using the MKS 3000, don’t forget to cycle the power on the mount
before attempting to use the periodic error corrections!
Apply PEC Correction
Please read the Important Note in the “XPeriodic Error Correction (PEC)X” section on page X65X
before continuing.
Mark the Apply PEC Correction option on the Periodic Error Correction tab of the More
Settings for Paramount ME dialog box to enable periodic error corrections. Or, from
TheSky6 Professional Edition’s main menu, click Telescope > Options > PEC > Enable to
enable periodic error corrections. Both options perform the same task.
The control system contains a parameter called the “PEC cutoff speed” that allows you to
specify the maximum tracking rate at which the PEC table will be ignored. Turning
clearing the Apply PEC Correction option effectively sets this rate to zero; that is, the PEC
table is ignored at all tracking rates.
When the PEC table is activated, corrections are not made at rates greater than twice the
sidereal tracking. Interestingly, even small corrections of three to five arcseconds cause an
audible (and somewhat annoying) variation to the otherwise smooth sounding motors at
higher tracking rates.
Recorded Table Group
Please read the Important Note in the “XPeriodic Error Correction (PEC)X” section on page X65X
before continuing.
The options in this group apply to the recorded PEC table.
Copy
The Copy button copies the PEC values to the Windows Clipboard. These units of these
values are in encoder tics. The number of entries depends on the PEC ratio computed by
the following formula:
Number of PEC table entries = 125 * PEC ratio
So, for the gear reduction system in the Paramount ME, the PEC ratio is 10 (that is, a 10:1
gear reduction before the worm) and the number of PEC table entries is 1,250.
The format of the PEC data can be viewed in Notepad (or any other ASCII text editor) by
clicking Edit > Paste. It is a simple format, each of the entries are separated by a carriage
return/line feed.