Setup Procedure
Perform Compass Offset
OceanTRx
TM
4-500 Installation and Operations Manual
7-13
Enter the 'naked-eye' estimate in the
Offset
field.
If the data latency (in seconds) is known, enter the latency in the
Latency
field. If
the latency is not known, leave the factory default setting of 0.060 seconds.
Click
OK
and then click
[V]
on the keyboard and press
Enter
to save.
3. Determine the antenna
nominal
azimuth:
Point the antenna to the desired satellite.
Write down the antenna’s azimuth as it appears in the
Antenna Target
window of
the
Operation Screen
. This will serve as your nominal azimuth. See the following
figure:
Figure
7-14: Antenna Target Window
4. Determine the antenna
actual a
zimuth:
Using Manual Mode (see
Section
on page 8-6), change the
antenna’s azimuth orientation until it points to the satellite.
The required amount of movement depends on the accuracy of your initial estimate
(a typical estimate will fall within ±10
°
).
NOTE: Use the Spectrum Analyzer Screen to determine when you are locked onto the satellite
(see Section
9.1 Once the satellite is acquired, set the antenna to Step-Track Mode (see
Section
8.1.4 Step-Track Mode on page 8-4).
5. Determine the azimuth deviation. This is the difference between the nominal azimuth
and the antenna’s actual azimuth.
You can use one of the following methods:
Observing the graphic
Az/El Deviation
window on the
Operation Screen
calibrated up to ±5
°
.
Figure
7-15: Az/El Deviation Window
Running the
Graphic Data Logger
, which records azimuth deviation as a
parameter of the Antenna Step Track subgroup (see
on page 9-10).
