KVH Industries TracVisionM7 用户手册
17
Follow these steps to set the antenna’s linear LNB
to the correct skew angle for your selected
satellite and vessel position.
to the correct skew angle for your selected
satellite and vessel position.
a. Using HyperTerminal or KVH Flash Update
Wizard, type SKEWANGLE then press
Enter. Note the reported skew angle.
TIP: The SKEWANGLE command provides the
correct skew angle for the currently selected satellite
only. If a pair of satellites is installed, you might wish
to set an average skew instead. To find the average
skew, select the second satellite then enter the
SKEWANGLE command again to get the second
satellite’s skew angle. Add the two skew angle
numbers together and divide by two to get the average.
correct skew angle for the currently selected satellite
only. If a pair of satellites is installed, you might wish
to set an average skew instead. To find the average
skew, select the second satellite then enter the
SKEWANGLE command again to get the second
satellite’s skew angle. Add the two skew angle
numbers together and divide by two to get the average.
b. Turn off and unplug the receiver(s) and
disconnect antenna power at the switchplate.
c. Remove the antenna’s radome, if you
installed it earlier in Step 7f.
d. Locate the LNB on the back of the antenna’s
e. Loosen the two wing screws on the LNB
choke feed. These wing screws secure the
LNB in place.
f. Adjust the LNB clockwise or counter-
clockwise until the skew arrow on the LNB
points to the skew angle that you noted in
Step 14a (see Figure 28).
Step 14a (see Figure 28).
g. Tighten the wing screws to secure the LNB.
h. Reinstall the radome (as explained in
Steps 7f-g on page 9).
CAUTION
Disconnect power from the antenna and the
receivers before you adjust the LNB. The
antenna’s moving parts can cause injury.
Wing
Screws
Reflector
LNB
Figure 27: Wing Screws Securing the LNB to the Reflector
0˚ Skew
Positive
Skews
Skews
Negative
Skews
0
10
20
40
50
70
80
30
90
60
50
10 20
30
40
60
70
80
90
5
5
15
15
25
35
45
25
35
45
55
65
75
85
55
65
75
85
LNB
SKEW
Choke Feed
Figure 28: LNB Skew Angle Adjustment
Be sure to keep the LNB fully inserted into the
choke feed to ensure optimum performance.
IMPORTANT!
Set the LNB Skew Angle
(Linear only)
14