Yaesu G-5500 User Manual - Alibra
11
Elevation Offset Null
r From the Controller panel, set the Elevation Rotator to
the “left” horizon (down, set to 0°).
r Press [O2] Ž [↵] (the letter “oh,” “2,” and “E
NTER
”) on
the computer keyboard to activate the elevation calibra-
tion routine. The computer will return AZaaaa = bbbb,
as in the previous procedure, plus ELcccc = dddd to
the right, where cccc and dddd are four-digit numbers
padded at the left with zeroes.
r Adjust the EL trimmer (located on the bottom case of
the GS-232A), so as to make the numbers cccc and
dddd are the same (again, the actual values are unim-
portant).
r Turn off the GS-232A’s POWER switch to exit the el-
evation calibration routine, then turn on the GS-232A’s
POWER switch again to turn it back on.
C
ALIBRA
TION
Elevation A-D Calibration
r From the Controller panel, set the Elevation Rotator to
full scale (180°: “right” horizon).
r Press [F2] Ž [↵] (F, 2, and E
NTER
) on the computer key-
board to activate the Control Interface’s elevation A-D
converter calibration routine. The computer will display
+aaaa+eeee, where eeee is a four-digit number which
indicates the elevation heading in degrees. For the pur-
poses of this alignment, you may ignore the (azimuth)
aaaa numbers.
r Adjust the OUT VOL ADJ potentiometer on the “E
L
-
EVATION
” (right) side of the Controller rear panel so as to
get a reading of “0180” on the computer’s display.
This reading (“180 degrees”) corresponds to the actual
beam heading you established when you pointed the
elevation rotator to the 180° position.
r Turn off the GS-232A’s POWER switch to exit the el-
evation A-D converter calibration routine, then turn on
the GS-232A’s POWER switch again to turn it back on.
G-5400B/-5600B A
Z
-E
L
R
OTATOR