3. Check that the track bed is sufficiently level by laying a 20 in (50 cm) straight edge on the track
bed perpendicular to the rails. This straight edge should align with the centerline of the two
isolators (refer to
for location of isolator) located near the connector and the centerline of
the end isolator. Measure the distance from the track bed to the bottom of the straight edge. The
track bed should not dip more than 1.75 in (4.42 cm) below the straight edge at a distance of 5-in
(12.7 cm) from the centerline of foot block #3. Additionally, the track bed surface should be smooth
(within 0.5 in) over the lengths of the 15-in (38.1 cm) and 5 in (12.7 cm) segments (
).
Figure 2 Metal-free Zone Around Antenna
Installation Guide
7
