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1. MOUNTING
1-3
Assembling the antenna unit
The antenna unit consists of the antenna radiator and the antenna unit chassis, and they
are packed separately. Fasten the antenna radiator to the antenna unit chassis as follows:
1. For the XN20AF, XN24AF, attach two guide pins to the underside of the antenna
radiator.
2. Remove the waveguide cap from the radiator bracket. The cap may be discarded.
3. Coat the waveguide flange with anticorrosive sealant as shown below.
Anticorrosive sealant
10 mm
O-ring Waveguide cap
5 mm
Hole for
a guide pin
Hole for
a guide pin
Coating the waveguide flange with anticorrosive sealant
4. Coat fixing holes for the antenna radiator with anticorrosive sealant.
5. Grease the O-ring and set it to the O-ring groove of the radiator flange.
6. Set the antenna radiator to the radiator bracket.
7. Coat hex bolts M8x40 (for XN-20AF or XN-24AF) or hex bolt M8x35/ flat washer/spring
washer (for XN-12AF) with anticorrosive sealant and use them to loosely fasten the
antenna radiator to the antenna unit chassis.
8. Remove two guide pins (inserted at step 1), and then tighten fixing bolts.
CAUTION
Be sure to remove the guide pins.
Injury may result if the guide pins loosen
and fall.