Yaesu G-5500 User Manual - Alibra
12
C
ALIBRA
TION
G-5500 A
Z
-E
L
R
OTATOR
Azimuth Offset Null
r Before calibrating the Rotator, check to see that the GS-
232A’s DIP switch (switch 5)is set to the “ON” posi-
tion.
r From the Controller panel, set the Rotator fully counter-
clockwise (set to 0°).
r Press [O] Ž [↵] (the letter “oh”, and “E
NTER
”) on the
computer keyboard to activate the azimuth calibration
routine. The computer display should show AZaaaa =
bbbb returned from the Interface Board, where aaaa
and bbbb are four-digit numbers padded at the left with
zeroes.
r Adjust the AZ trimmer (located on the bottom case of
the GS-232A) while watching the computer display, until
the four-digit numbers aaaa and bbbb are the same
(the precise values are not important).
r Turn off the GS-232A’s POWER switch to exit the azi-
muth calibration routine, then turn on the GS-232A’s
POWER switch again.
Azimuth A-D Calibration
r From the Controller panel, set the Azimuth Rotator fully
clockwise (to the right).
r Press [F] Ž [↵] (F and E
NTER
) on the computer keyboard
to activate the Control Interface’s azimuth A-D converter
calibration routine. The computer’s display should show
+aaaa, where aaaa is a four-digit number which indi-
cates the azimuth heading in degrees.
r Adjust the OUT VOL ADJ potentiometer on the “A
ZI
-
MUTH
” (left) side of the Controller rear panel so as to get
a reading of “0450” on the computer’s display. This
reading (“0450: 360 degrees + 90 degrees”) corre-
sponds to the actual beam heading you established when
you pointed the azimuth rotator fully clockwise.
r Turn off the GS-232A’s POWER switch to exit the azi-
muth A-D converter calibration routine, then turn on the
GS-232A’s POWER switch again.