Nautel NX400, Installation Manual

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NX400 Installation Manual Installing audio inputs
Issue 1.0 2017-06-30 Page 8-1
Section 8: Installing audio inputs
This section describes how to route audio input wiring to the NX400’s exciters.
Planning complete?
1. Make sure you have read and fully understood the audio input options described in the
NX400 Pre-installation Manual before proceeding.
2. Make sure the audio input wires are long enough to allow routing through the top of the
transmitter cabinet and down to the exciter panel.
Routing cables and connecting audio inputs
1. Route all audio cables from their audio sources to the top of the NX400’s control cabinet
(cabinet 1). Two possible entry holes are provided to accept audio input wiring (see
Figure 8.2 on page 8-3 ).
2. Punch the appropriate size hole in the desired audio entry plate as follows:
– Remove the left-hand or right-hand entry plate (see Figure 8.2 on page 8-3 ) from the top
of the cabinet. Each is secured using two M4 screws and has a pre-cut, centered 1/4-inch
diameter hole.
– Use a chassis punch tool (e.g., Greenlee, etc.) to punch the desired size hole in the entry
plate. Make sure the audio input cables will pass safely through the hole. If necessary, you
can remove the plate completely to gain access to a smaller, rectangular hole.
– Install a conduit termination on the entry plate, if desired.
– Re-install the entry plate on top of the transmitter using two M4 screws.
3. Obtain two ferrite toroids (one each of Nautel Part # LXP44 and LXP38) from the ancillary kit.
4. Pass all audio input cables through the ferrite toroids obtained in Step 3 . If practical, wires
should pass through a minimum of two times (two turns) (see Figure 8.1 on page 8-2 ).
Position the ferrite toroids just outside, or just inside, the audio input entry hole.
5. Route the audio input cables through the selected entry hole and toward the exciter panel
(A11), located behind the front door (see Figure 8.3 on page 8-4 ). If possible, install exciter
mating connectors after passing cables through the entry hole. Route all wiring from the top
of the cabinet to the hinged side of the exciter panel to allow the panel to open.