Nautel NX3, Installation Manual

Page: 16 / 70

NX5/NX3 INSTALLATION MANUAL UNPACKING AND POSITIONING
PAGE 2.2.6 VERSION 3.1 2021-04-22
7. If you are using a closed air cooling configuration (see the NX5/NX3 Pre-Installation Manual for
details):
 Obtain the cover plate (Nautel Part # 212-5052) that was packed with the NX5/NX3
ancillaries.
 Loosen the four (4) quarter-turn fasteners that secure the filter bracket to the rear door and
remove the filter bracket (see
Figure 2.2.5 on page 2.2.7 ).
 Install the cover plate in its place and tighten its quarter-turn fasteners.
 Remove the cover plate from the top of the NX5/NX3 (see Figure 2.2.5 on page 2.2.7 ) and
attach the user-provided air intake duct.
8. Verify that the ac power cable from the ac power disconnect switch is long enough to reach
through the entry point at the top or bottom of the NX5/NX3, to the transformer’s primary
terminals at the bottom of the NX5/NX3.
9. Install the RF output connector as follows (see Figure 2.2.6 on page 2.2.8 or Figure 2.2.7 on page
2.2.9 ):
NOTE
: The RF output connector for an NX5/NX3 can be configured for an 1-5/8 inch or 7/8 inch EIA
connector. An output connector kit for the predetermined connector is provided with the ancillaries. The
user must provide the appropriate inner male (bullet) connector and field flange connector to complete
the RF output connector.
 Obtain the appropriate output connector kit (Nautel Part # 212-6200 for 1-5/8 inch or Nautel
Part # 212-6200-01 for 7/8 inch), which was packed with the ancillary crate. Install the output
cup, spacer plate and stud plate as shown in
Figure 2.2.6 on page 2.2.8 (1-5/8 inch EIA) or
Figure 2.2.7 on page 2.2.9 (7/8 inch EIA), using hardware provided in the kit.
 Install the user-provided inner male (bullet) connector in the RF output cup and install the
user-provided field flange on top of the stud plate. Secure using provided hardware. RF feed
cable installation is completed later in this manual.
10. Verify that the RF feed cable reaches the RF output connector on the top of the NX5/NX3.
11. Remove the rear door’s securing screws and open the rear door. Locate the arc detector assembly
(A24) (see Figure 2.2.8 on page 2.2.10 ) and remove the protective packing material that was added
to prevent shipping damage. Close and secure the rear door.