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JRC NTG337-EL0 Instruction Manual: Finely Adjusting The Direction

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6.7.3. Finely Adjusting the Direction

Step 1: Horizontal direction
As shown in Figure 6-36, loosen the hexagonal socket head bolts (a) and (b) securing the
mounting bracket and swing the antenna left or right. Adjust the antenna direction so that the
receive level indicates the maximum value, and finger-tighten the bolts (a) and (b).
Step 2: Vertical direction
As shown in Figure 6-37, loosen the hexagonal socket head bolts (c), (d), and (e) securing the
mounting bracket and tilt the antenna up or down. Adjust the antenna direction so that the
receive level indicates the maximum value. Tighten the bolts at a point showing the maximum
receive level (tightening torque: 8.5N•m). Tighten the bolts (c), (d), and (e) and make sure that
the point showing the maximum receive level is maintained. This concludes the procedure for
vertical-direction adjustment.
Step 3: Horizontal direction
Finely adjust the horizontal direction by slightly loosening the bolts (a) and (b) again. Once
again, locate the point where the receive level reaches the maximum value and hold that point.
Finally, tighten the bolts (a) and (b) (tightening torque: 8.5N•m) while making sure that the
point showing the maximum receive level is maintained. This concludes the procedure for
horizontal-direction adjustment.
The figures show examples of horizontal polarization setup.
(a)
(b)
Figure 6-36 Finely Adjusting the Horizontal Direction
Note :
When adjusting the antenna direction
When adjusting the direction, you might mistakenly take the antenna's side lobe as
the maximum receive level. For fine adjustment, therefore, you should move the
antenna some more after the receive level has reached the maximum value to make
sure that you have not caught a side lobe.
(e)
Figure 6-37 Finely Adjusting the Vertical Direction
6-92
(c)
(d)

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