Nat NPX138N Series Installation And Operation Manual
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Nat NPX138N Series Installation And Operation Manual

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Installation and Operation Manual
NPX138N Series
Panel Mount FM Transceiver
SM41
ISSUE 4.01
Published on
August 1, 2012
Northern Airborne Technology Ltd.
1925 Kirschner Road
Kelowna, BC, Canada.
V1Y 4N7
Telephone (250) 763-2232
Facsimile (250) 762-3374
Issued on the authority of Northern Airborne Technology Ltd.
Copyright 2010
The document reference is online, please check the correspondence between the online documentation and the printed version.

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  • Page 1 Installation and Operation Manual NPX138N Series Panel Mount FM Transceiver SM41 ISSUE 4.01 Published on August 1, 2012 Northern Airborne Technology Ltd. 1925 Kirschner Road Kelowna, BC, Canada. V1Y 4N7 Telephone (250) 763-2232 Facsimile (250) 762-3374 Issued on the authority of Northern Airborne Technology Ltd.
  • Page 2 SM41 Installation and Operation Manual IMPORTANT INFORMATION FOR AVIONICS INSTALLATION FACILITIES The NPX138N Series Panel Mount FM Transceivers are supplied without TSO certification, as no such standard presently exists for airborne VHF-FM radio transceivers. This equipment provides what is considered as “supplemental”...
  • Page 3 NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual Prepared By: Checked By: Certification: Approved By: The status of this installation and operation manual is controlled by issue shown on the title page. The status of each section is controlled by revision shown in the footer of each page. All revisions affecting sections of this manual have been incorporated into the latest issue.

  • Page 4: Table Of Contents

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual Table of Contents Section Title Page Description Introduction Product Description Design Features Specifications 1.4.1 Electrical Specifications 1.4.2 Physical Specifications 1.4.3 Environmental Specifications Unit Nomenclature 1.5.1 Narrowband Capability 1.5.2 Lighting Power 1.5.3...

  • Page 5: Section Title Page

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual Section Title Page Operation Introduction General Information Controls and Indicators Initial Operation 3.4.1 Power-up Help 3.4.2 Initial Operating Display Display Function Controls 3.6.1 Main RX (Receive) Volume Control 3.6.2 RX/TX Status Indicator 3.6.3...

  • Page 6: Description

    The NPX138N Series panel mount FM transceiver is a stand-alone radio designed for the single mission user. It provides all the features needed to satisfy FM communications within the VHF-FM high band.

  • Page 7: Specifications

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual Specifications 1.4.1 Electrical Specifications Input power 28 Vdc nominal Current consumption 0.5 A receive/2.0 A transmit (typical) 0.8 A receive/3.0 A transmit (max.) Panel lighting 28 Vdc, 14 Vdc or 5 Vdc dependent on model 25 mW @ 600 Ω, adjustable.

  • Page 8: Physical Specifications

    -30 C to +60 C Altitude 25,000 feet Humidity Vibration DO-160C Cat. M Unit Nomenclature Variants of the NPX138N series radios are identified as follows: Narrowband Capability NPX138 N - 000 Encryption Special Options Lighting Power Section 1 Rev: 1.00...

  • Page 9: Voice-Inversion Encryption

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual 1.5.1 Narrowband Capability {tc "1.6.1 Narrowband Capability "} The letter N after the NPX138 designation indicates the capability for narrowband selection in addition to wideband. If this part of the name is blank, the unit has wideband capabilities only.

  • Page 10: Installation

    Section 2 Installation Introduction Information in this section consists of unpacking and inspection procedures, installation procedures, post-installation checks and installation drawings for the NPX138N Series Panel Mount FM Transceiver. Review all notes, warnings and cautions. Unpacking and Inspection Unpack the equipment carefully and locate the warranty card. Inspect the unit visually for damage due to shipping and report all such claims immediately to the carrier involved.

  • Page 11: Warnings

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual 2.4.1 Warnings WARNING: High volume settings can cause hearing damage. Set the headset volume control to the minimum setting prior to conducting tests, and slowly increase the volume to a comfortable listening level.

  • Page 12: Antennas

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual permit the unit to be removed from the panel for easy access to all side adjustments. Do NOT mount the unit until all adjustments have been performed. Maintain wire segregation and route wiring in accordance with the original aircraft manufacturers Maintenance Instructions.

  • Page 13: Post-Installation Checks

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual 2.4.7 Post-Installation Checks 2.4.7.1 Voltage/resistance checks Do not attach the NPX138N until the following conditions are met. Check the following: P101 pins <12> and <13> for +28 Vdc relative to ground.
  • Page 14 NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual 2.4.8 Post Installation EMI Test The purpose of this test is to identify any interference that the NPX138N may cause with existing aircraft systems. The NPX138N should be tested in accordance with the Installation Approval Test Procedure (see section 2.5), and the test results documented on the record sheets.
  • Page 15 The document reference is online, please check the correspondence between the online documentation and the printed version.
  • Page 16 The document reference is online, please check the correspondence between the online documentation and the printed version.
  • Page 17 The document reference is online, please check the correspondence between the online documentation and the printed version.
  • Page 18 INSTALLATION APPROVAL TEST PROCEDURE NAT Part #: NPX138 Description: Panel Mount Radio Document #: NPX138\634-0 Rev: 1.10 Post Installation EMI Test The purpose of this test is to identify any interference that the NPX138 may cause with existing aircraft systems.
  • Page 19 NPX138 Installation Approval Test Procedure Results If the installed system passes all of the applicable EMI tests, then no further action is required. If interference is observed, then the interference must be assessed against the appropriate standards of airworthiness for the system in question. For example: it is permissible for a VFR certified GPS to lose navigation capability while the NPX138 is transmitting, providing that it recovers properly and promptly, but it is not permissible for an IFR Approach certified GPS to be affected in the same way.
  • Page 20 NPX138 Installation Approval Test Procedure Determine if the image frequency for the VHF Comm falls within the range of the NPX138 unit. If so, select a set of frequencies that will cause the NPX138 to be set as close as possible to the image frequency. Any one of the many possible sets will suffice.
  • Page 21 NPX138 Installation Approval Test Procedure Determine if the image frequency for the VOR/ILS Nav falls within the range of the NPX138 unit. If so, select two sets of frequencies that will cause the NPX138 to be set as close as possible to the image frequency. Choose one set in the localizer frequency range, and one in the VOR frequency range.
  • Page 22 NPX138 Installation Approval Test Procedure Modulate the NPX138 transmitter on the following frequencies for at least 20 seconds. Look for any movement of flags or needles on the navigation display. FREQUENCIES RESULTS G/S #1 NPX138 PASS FAIL 334.7 (108.1) 167.3500 FREQUENCIES RESULTS G/S #2...
  • Page 23 NPX138 Installation Approval Test Procedure Perform a coupled ILS approach to the aircraft's certified limits. Modulate the NPX138 transmitter on the above frequencies for at least 20 seconds. Observe any effect on the autopilot. Repeat for each different system such as ILS #2, GPS, FMS etc.
  • Page 24 NPX138 Installation Approval Test Procedure STEP SYSTEM PASS FAIL NOTES NOTES: End of Installation Approval Test Procedure Rev. 1.10 Apr 19, 2004 Page 7 of 7 E NG-FORM: 634-0100.DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD. The document reference is online, please check the correspondence between the online documentation and the printed version.
  • Page 25 The document reference is online, please check the correspondence between the online documentation and the printed version.
  • Page 26 The document reference is online, please check the correspondence between the online documentation and the printed version.

  • Page 27: Operation

    For ease of use and operability, Northern Airborne Technology Ltd uses the same control layout and operating system in the NPX138N series of radios as it does in its popular Tac/Com family of radio control heads.

  • Page 28: Initial Operation

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual Initial Operation{tc "1.4.2 Initial Operation"} 3.4.1 Power-up Help Turn the NPX138N on by rotating the main volume control clockwise, away from the ‘Off’ detent position. The software revision number will briefly display, followed by a screen presenting an option for use of the on-line Help system, as shown below.

  • Page 29: Display

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual Display{tc "1.4.3 Display"} Channel Info Status Info Brightness Control Channel Display Mode The diagram above shows a typical radio display in ‘Normal’ operating mode. The upper row of the display contains information related to the currently selected channel.

  • Page 30: Main Rx (Receive) Volume Control

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual 3.6.1 Main RX (Receive) Volume Control Set this rotary control to the furthest counterclockwise position (past the ‘Off’ detent) to turn ‘off’ the radio. Rotating it clockwise will turn ‘on’ the radio. To increase the volume of the main receiver, turn this knob clockwise;...

  • Page 31: General Controls - Normal Operating Mode

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual The rotary knob independently sets the guard RX volume. In most models, there is no ‘Off’ detent position. On most NPX138N models, even with the guard RX volume set completely counterclockwise, the operator will still hear activity on the guard channel (at the preset minimum level).

  • Page 32: Brightness Switch

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual 3.7.2 Brightness Switch The BRIGHT switch controls the brightness of the radio display. Momentarily press it to the right ‘+’ to increment the display brightness by one level and to the left ‘−’ to decrement by one level. There are seven brightness levels from which to select.

  • Page 33: Rx Display Line

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual 3.8.2 RX Display Line The RX line includes the channel number, the receive frequency and the receive tone. A typical RX line might look like this: 156.8750r Channel RX Freq.

  • Page 34: Channel Editing

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual Channel Editing{tc "1.4.7 Channel Editing"} Editing is the general term for changing any information stored in the NPX138N radio. There are two basic types of editing, all selectable from the front panel of the radio. These are ‘Channel editing’ (CH) and ‘Status editing’...

  • Page 35: Next Switch

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual The selection choices string together as if in a circle, and the operator FREQUENCY EDITING moves through this circle with the SELECT switch. Depending on which WHILE IN CHANNEL EDIT way the operator sets the SELECT switch (+ or −), the editor will move...

  • Page 36: Status Editing

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual 3.10 Status Editing{tc "1.4.8 Status Editing"} There is simply not enough room on the compact front panel of the NPX138N radio to fit a switch for every radio function. The solution for this is the use of status lines to display and control features that do not require immediate accessibility via the front panel.

  • Page 37: Status Edit Features

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual 3.10.2 Status Edit Features The STATUS EDIT features currently implemented in NPX138N are as follows: • TX MODE There are two modes possible: DUPLEX (repeater) operation, and SIMPLEX (direct) operation.

  • Page 38: Tones

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual 3.11 Tones{tc "1.4.9 Tones"} 3.11.1 General The tone system used by the NPX138N radio is a Continuous Tone-Coded Squelch System (CTCSS), as defined by an Electronic Industries Association (EIA) standard. The radio adds these tones to the normal signal modulation (such as voice) to uniquely identify or select a particular radio or group of users.
  • Page 39 NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual Table 1 below shows the four different display options for each of the available tones. Tone Frequency (Hz) 1-38 WCODE MCODE 67.0 71.9 74.4 77.0 79.7 82.5 85.4 88.5 91.5...

  • Page 40: Turning Tones On And Off

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual 3.11.3 Turning Tones On and Off The NPX138N radio also has the capability to have tones enabled or disabled globally. By editing the TONES status line, the operator can set all the tones ON, OFF or to TX ONLY.

  • Page 41: Scan Operation

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual 3.12.2 Scan Operation Activate scanning by moving the SCAN/NORM/GD TX toggle switch to the SCAN position. The ‘home’ channel is the channel that the radio was on before scanning was activated.

  • Page 42: Wideband/Narrowband Operation

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual stops, and then wait for a 2-3 second latency period to permit the operator to reply. If there is no further activity, the radio will continue through the list, and then start over. When scanning is turned off, the radio resumes normal operation on the home channel (the one set before scanning began).

  • Page 43: Configuration Mode

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual 3.14 Configuration Mode{tc "1.4.12 Configuration Mode"} This mode of operation is not required for normal operation and is intended to aid in servicing and radio set-up. Various firmware functions of the radio can be set via this mode.

  • Page 44: Configuration Option Table

    NPX138N Series Panel Mount FM Transceiver SM41 Installation and Operation Manual 3.14.2 Configuration Option Table FEATURE VALID OPTIONS COMMENTS STATUS DISPLAY ON, OFF Determines whether or not the radio status lines ON POWER-UP are displayed on power-up. EXT. DATA PAD...

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