PPC-1000 Rev.1.0
22 of 29
User
Manual
© DOK Ltd (Mm-wave Division of ELVA-1 ltd), 2005-2006. All rights reserved.
For mainlobe, the AGC voltage at Tuning panel has to be closely to the value in Passport for
such distance. For sidelobe, the AGC voltage at Tuning panel will differ (will be higher)
compare to the value in Passport for such distance for a value of about 1 Volt.
Second, as result of the successful alignment you have three minimums of AGC voltage when
scan the line of sight horizontally (see schemas below). If you have only two minimums, it
means you missed the mainlobe.
The alignment procedure is as following:
1.
Start slowly moving both
radios within a line of sight,
trying to get a first contact
of at least sidelobes.
Pay attention to AGC
voltage, and look for a
voltdrop.
•
When got a voltdrop of AGC voltage, immediately stop moving of both radios (say
“STOP” to your partner, working at another radio).
•
Have another radio static; very slowly scan your radio horizontally closely to the point
of first contact.
•
Check how many voltdrops you will get when do scanning horizontally. If this will be 3
minimums, the central one is mainlobe. If you got only two minimums, it means you
missed the mainlobe. Try to stop the antenna horizontally at center of the virtual arc
between two AGC voltage minimums, then slowly scan the antenna vertically to find
mainlobe.
Look for a voltdrop
of AGC voltage
Scan the line of sight
for two
radios until the first contact
of sidelobes.
Stop movement of both radios
at this point, then begin
a precise alignment
by one radio only to get to
mainlobe. Then repeat for
another radio.
simultaneously
