RE: [amsat-bb] Fodtrack readout

["Gary Mayfield" <gary_mayfield@xxxxxxxxxxx>]

Line 36 of fodtrack.cfg 0 for South 1 for North

From: "Electronic Dep" <matronics@hotmail.com>
To: amsat-bb@amsat.org
Subject: [amsat-bb] Fodtrack readout
Date: Tue, 12 Apr 2005 09:05:20 +0000

Hi Amsats,

I've constructed a FODTRACK that works well, but I
noticed that: the "starting point" (or terminating) of bearing-rotator is
straight to SOUTH (180°), probably that is the program's default.
Is it possible to change that by 180°, in order
to terminate the rotor in the opposite direction? (terminate to NORTH).

I wondering, because if you have a Digital readout(DVM) into the Shack,
the problem with SOUTH "starting-point" is unsolved till now for me.
For example,if the reference voltage is 0 V on DVM, the antenna looking
to SOUTH (180°).
If the ref.voltage is 0.180 V, the antenna looking to NORTH (360°) !
If the ref.voltage is 0.359 V, the antenna looking to 179° SOUTH !
Exactly the opposite that the DIGITAL readout needs.

(In contrast, if the starting point is straight to NORTH, the "bearing"
is equal to DVM indication, ie 0V=0°, 0.90V=90°, 0.180V=180° etc).

Any suggestion is welcome.

Regards

John Smith
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
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