Nautel NX50 User manual

NX50 Transmitter
Installation Manual
Document:NHB-NX50-INS
Issue: 6.1 2021-07-13
Status: Standard

Nautel Limited
10089 Peggy’s Cove Road
Hackett’s Cove, NS Canada B3Z 3J4
Phone: [phone] or
Toll Free: +1.877.6NAUTEL (6628835) (Canada & USA only)
Fax: [phone]
Nautel Inc.
201 Target Industrial Circle
Bangor, Maine USA 04401
Phone: [phone]
Fax: [phone]
Customer Service (24 hour support)
+1.877.628.8353 (Canada & USA only)
+1.902.823.5100 (International)
Email: [email protected]
Web: www.nautel.com
The comparisons and other information provided in this
document have been prepared in good faith based on publicly
available information. The reader is encouraged to consult the
respective manufacturer's most recent published data for
verification.
© Copyright 2019 NAUTEL. All rights reserved.

NX50 Installation Manual Table of contents
Page v
Contents
Release control record vii
Preparing for installation 1-1
Unpacking and positioning 2-1
Installing the power transformer 3-1
Connecting the station reference ground 4-1
Connecting ac power 5-1
Adjusting the spark gap 6-1
Installing audio inputs 7-1
Planning complete? 7-1
Routing cables and connecting audio inputs 7-1
Installing control/monitor wiring 8-1
Planning complete? 8-1
Routing cables 8-1
Commissioning tasks 9-1
Pre-commissioning tasks 9-1
Commissioning 9-3
Going on-air 9-7
Network Setup 9-8

NX50 Installation Manual
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Parts and tools 10-1
Contacting Nautel 10-1
Parts supplied by Nautel 10-1
Parts not supplied by Nautel 10-2
Parts ordering 10-2
Module replacement program 10-2
Tools for installation 10-3
Pre-installation / Installation assistance 11-1
Pre-installation consulting 11-1
Installation and commissioning service 11-1
Online documentation 11-3
On-site support 11-3
Training 11-3
Standard warranty 11-4
Extended warranties 11-7
List of terms 12-1

NX50 Installation Manual
Issue 6.1 2021-07-13 Page vii
Release control record
Issue Date Reason
6.0 2019-04-01 Supports release 6 of hardware (NARA53E) and
software version NX SW 4.7 or higher.
6.1 2021-07-13 Section 3: Installing the Power Transformer -
changes for wheel assembly and fuse and MOV
assembly connections.

NX50 Installation Manual
Page viii Issue 6.1 2021-07-13

NX50 Installation Manual Preparing for installation
Issue 6.1 2021-07-13 Page 1-1
Section 1: Preparing for installation
Before installing your NX50 transmitter, perform the following steps:
1. Ensure that you have performed the pre-installation tasks described in the
NX50 Pre-installation Manual.
2. Make sure that you received all the components. (Check your packing list.)
3. Inspect all crates and packages for damage. Inspect the tip and drop indicators attached to
the crates to determine if a crate has been tipped over or has been subjected to excessive
shock (see Figure 1.1).
Figure 1.1: Tip and Drop Indicators
4. Report any damage immediately to your Nautel sales representative and the carrier.
5. Move the crates as close as possible to the transmitter’s planned location.

NX50 Installation Manual Preparing for installation
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6. Unpack the crates in accordance with the instructions provided on the outside of the
crates.
• For each crate, remove the panel labeled open this side. The panel is attached
using Philips head screws.
• Remove any visible packing material, including braces, from the crate's interior.
• Remove the remaining outer plywood shell by unscrewing the outer wood panels
from the pallet under the transmitter.
7. Review any assembly notes or instructions contained inside the transmitter crates. (For
sites requiring custom configurations, the instructions provided with the transmitter
replace the instructions provided here.)
8. Gather the parts and tools you will need for installation. For a list of required tools, see
“Parts and tools” on page 10-1.
9. When you are ready to install the NX50 transmitter, follow the steps shown in
Figure 1.2 on page 1-3.
TIP When you have completed a task or step, put a check mark beside the step
number.
CAUTION:
FAILURE TO COMPLY WITH RECOMMENDATIONS MAY VOID YOUR MANUFACTURER’S
WARRANTY. FOR MORE INFORMATION, REVIEW YOUR WARRANTY DOCUMENTS.

NX50 Installation Manual Preparing for installation
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Figure 1.2: Flowchart - Installing the transmitter
Unpacking and positioning - see page 2-1
Installing the power transformer - see page 3-1
Connecting the station reference ground - see page 4-1
Installing control/monitor wiring - see page 8-1
Commissioning tasks - see page 9-1
Perform operational tasks:
“Commissioning”, “Modulation checks” and “Going on-air”, beginning on page 9-3
Connecting ac power - see page 5-1
Installing audio inputs - see page 7-1
Adjusting the spark gap - see page 6-1

NX50 Installation Manual Preparing for installation
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NX50 Installation Manual Unpacking and positioning
Issue 6.1 2021-07-13 Page 2-1
Section 2: Unpacking and positioning
To install an NX50 transmitter, perform the following tasks:
1. Lift and/or slide the transmitter cabinets off the base of their crates using mechanical
assistance (i.e., a forklift) and/or sufficient manpower. The NX50 is shipped in two
main crates - one transmitter cabinet and a transformer. Crated and uncrated weights
are shown in Table 2.1. An additional crate, which contains the ac safety interlock
switch, may also be provided. Alternatively, depending on its size, the ac safety
interlock switch may be packed in the ancillary crate for shipping.
Table 2.1: NX50 Cabinet Weights
2. Usingnecessarymechanicalassistance(forklift,etc)and/orsufficientmanpower,position
the cabinet in its final location.
3.
4. Install the ac disconnect switch in the selected location and label it TRANSMITTER
EMERGENCYON/OFFSWITCH.Verifythatthe acpower cableand conduit ortray fromthe
ac power disconnect switch reaches the entry point in the power transformer cabinet.
CAUTION:
The NX50 contains adjustable feet that allow leveling of the cabinet
in its final position. ensure the leveling feet are fully retracted (up)
before moving the NX50. failure to do so may cause damage to the
leveling feet and attached metalwork.
WARNING:
Do not attempt to move the transmitter cabinet or the transformer
unless sufficient manpower or mechanical assistance is available to
move it into position without damaging the cabinet or causing injury
to personnel.
Cabinet Crated Weight
kg (lbs)
Uncrated Weight
kg (lbs)
Transmitter 570 (1257) 467 (1030)
Power Transformer 477 (1052) 417 (919)

NX50 Installation Manual Unpacking and positioning
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5. Cover the top of the transmitter, using a plastic sheet or suitable equivalent, to prevent
debris and hardware from falling into the transmitter. Keep the sheet on the
transmitter until Section 9, “Commissioning tasks” on page 9-1.
6. The transmitter is factory configured for open loop cooling however, if you are using the
optional closed loop cooling configuration (see the NX50 Pre-Installation Manual for
details), follow the installation steps below:
• Obtain the cover plate (Nautel Part # 207-8211) packed with the ancillaries.
• Remove the nine (9) M4 screws that secure the filter brackets to the rear door and
remove the air filter and brackets (see Figure 2.1 on page 2-4).
• Install the cover plate using the screws from the previous step in place of the removed
brackets.
• Remove the top cover plate (see Figure 2.1 on page 2-4) to uncover the intake grill
necessary for the ducted incoming air
7. Openthefrontdoorofthetransmitter,removeandretainthe23M5screwsfromthehinged
filter door (see Figure 2.2 on page 2-5). Unlock and open the filter door to gain access
to the inside of the filter section.
8. If you purchased the optional key sequence interlock system, install the antenna ground
switch on top of the transmitter cabinet as follows (see Figure 2.3 on page 2-6):
• Locate the antenna ground switch (Nautel Part # 207-8320-04), and its securing
hardware, that was packed with the ancillary crate for shipping.
• Remove any protective wrapping from the antenna ground switch and position it
ontopofthetransmittercabinet,notingproperorientationandthatthealuminumrod
protrudingfromthebottomoftheantennagroundswitchmustpassthroughaclearance
hole in the transmitter cabinet.
• Temporarily remove the right-hand side cover (as viewed from the front) from the
antenna ground switch, to allow access to the securing hardware. Using the
hardware packed with the switch, secure the antenna ground switch to the top of
the cabinet using 4 sets of M6 hardware (. Secure the aluminum rod to the output plate
usinganM10 button-headcap-screw, splitwasher andflatwasher,alsopacked withthe
switch. Torque hardware to 140 in-lbs.

NX50 Installation Manual Unpacking and positioning
Issue 6.1 2021-07-13 Page 2-3
9. Install the RF output connector, which was partially disassembled for shipment, on top of
the transmitter cabinet (see Figure 2.4 on page 2-7). Alternatively, if the antenna
ground switch is installed, install the RF output connector on top of the switch (see
Figure 2.6 on page 2-9). Re-install the antenna ground switch’s right-hand side cover if
applicable.
10. Closeandlockthefilter panelandre-installthe23retainedM5screws.Closethefront door
of the transmitter. Continue with transmitter installation.
11. Verify that the RF antenna feed reaches the connector on top of the cabinet.
12. Unlock and open the rear door. Locate the arc detector assembly (A47) on the right-hand
interior wall, near the low voltage power supplies (see Figure 2.7 on page 2-10).
Remove the packing material that has been used to protect it from vibration damage
during shipping. Close the rear door.
13. Obtain four stiffener brackets [Nautel Part # 207-8296 (qty 1), 207-8296-01 (qty 1) and
207-8296-02 (qty 2)] for each transmitter cabinet from the ancillary kit. Install them on the
top of cabinet as shown in Figure 2.8 on page 2-11. Use the existing hardware that
secures the exhaust duct's grill to secure the stiffener brackets. These brackets provide
additional mechanical strength to the top of the cabinet(s).
14. Obtain the ac entry adapter plate assembly (Nautel Part # 207-8428) from the ancillary kit.
Using hardware (4 each; M6 stainless hex screws, split and plain washers) tyrapped to
assembly, install on top of cabinet as shown in
WARNING:
Take special care when removing the packing material from the arc
detector’s UV sensor so it does not receive impact shock. Do not allow
skin contact with the glass face. Wear clean gloves to ensure no oils from
your skin contact the surface of the glass.

NX50 Installation Manual Unpacking and positioning
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Figure 2.1: Installing Rear Plate and Removing Top Cover Plate - Closed Air Cooling
Remove the 9 M4 screws that
secure the filter bracket.
Use same holes and hardware
to install cover plate.
Partial Rear View
Remove top cover plate.
Partial Top View

NX50 Installation Manual Unpacking and positioning
Issue 6.1 2021-07-13 Page 2-5
Figure 2.2: Opening the Transmitter Filter Door
Remove the 23 M5 screws that
secure the hinged filter panel.
Front Door Removed for Clarity

NX50 Installation Manual Unpacking and positioning
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Figure 2.3: Installing Antenna Ground Switch
Antenna Ground Switch
Aluminum Rod
(secure to probe bracket with
Four sets of M6 hardware
(packed with antenna
ground switch)
antenna ground switch)
M8 hardware, packed with
(Nautel Part # 207-8320-04)

NX50 Installation Manual Unpacking and positioning
Issue 6.1 2021-07-13 Page 2-7
Figure 2.4: Installing RF Output Connector (3 1/8” EIA)
Standard 3 1/8” EIA
(Nautel Part # 203-6094-02)
Four sets of M6 hardware
(hex screw, split washer
and plain washer)
M8 Hex Bolt (60LG)

NX50 Installation Manual Unpacking and positioning
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Figure 2.5: Installing RF Output Connector (4 1/16” EIA)
Standard 4 1/16” EIA
(Nautel Part # 203-6094-03)
Four sets of M6 hardware
(hex screw, split washer
and plain washer)
M8 Hex Bolt (20LG)