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NPX138N Series Panel Mount FM Transceiver

SM41 Installation and Operation Manual

Section 3 Rev: 1.00

Issue 4

Page 3-1

ENG-FORM: 806-0115.DOT

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

Section 3 Operation

3.1

Introduction

Information in this section consists of functional and operational procedures for the

NPX138N Panel

Mount FM Transceiver

.

3.2

General Information

In addition to the general functions that are available on other FM radios, the NPX138N has several
features that extend its capability and make it easier to use. These features include alphanumeric
channel labelling, built-in operator help, scanning, optional guard receiver, and numerous others.

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.

In addition to this manual, there is a help function built into the radio comprehensive sufficient to address
most operational questions.

Many of the front panel controls have more than one function, dependent on the operating mode of the
radio. For this reason, they have multiple labels. When the radio is in ‘Normal’ mode (

EDIT

switch in the

center ‘Off’ position), use the top label and when the radio is in ‘Edit’ mode (either ‘CH’ or ‘ST’), use the
bottom label.

3.3

Controls and Indicators

In addition to the general functions that are available on other FM radios, the NPX138N has several
features that extend its capability and make it easier to use. These features include alphanumeric
channel labelling, built-in operator help, scanning, optional guard receiver, and numerous others.

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.

In addition to this manual, there is a help function built into the radio comprehensive enough to address
most operational questions.

Many of the front panel controls have more than one function, dependent on the operating mode of the
radio. For this reason, they have multiple labels. When the radio is in ‘Normal’ mode (

EDIT

switch in the

center ‘Off’ position), use the top label; and when the radio is in ‘Edit’ mode (either ‘

CH

’ or ‘

ST

’) use the

bottom label.

The document reference is online, please check the correspondence between the online documentation and the printed version.

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Содержание NPX138N Series

Страница 1: ... 3374 Issued on the authority of Northern Airborne Technology Ltd Copyright 2010 Installation and Operation Manual NPX138N Series Panel Mount FM Transceiver SM41 ISSUE 4 01 The document reference is online please check the correspondence between the online documentation and the printed version Published on August 1 2012 ...

Страница 2: ...transceivers This equipment provides what is considered as supplemental communications and can be installed in an aircraft on a Non interference basis Installation should be performed using standard procedures applicable to aircraft radio installation to ensure that the newly installed equipment does not interfere with any other equipment in the aircraft This device complies with Part 15 of the FC...

Страница 3: ...of each page All revisions affecting sections of this manual have been incorporated into the latest issue IMPORTANT NOTICE Chelton Avionics Inc doing business as Wulfsburg Electronics Inc will be responsible for full distribution and revisions of ICA s Instructions for Continued Airworthiness ISSUE REVISION RECORD Manual Issue Number Section Revision Number Revision Description Issue Date 4 01 Sec...

Страница 4: ...ns 1 3 1 5 Unit Nomenclature 1 3 1 5 1 Narrowband Capability 1 4 1 5 2 Lighting Power 1 4 1 5 3 Special Options 1 4 1 5 4 Voice Inversion Encryption 1 4 2 Installation 2 1 Introduction 2 1 2 2 Unpacking and Inspection 2 1 2 2 1 Warranty 2 1 2 3 Continued Airworthiness 2 1 2 4 Installation Procedures 2 1 2 4 1 Warnings 2 2 2 4 2 Cautions 2 2 2 4 3 Notes 2 2 2 4 4 Cabling and Wiring 2 2 2 4 5 Antenn...

Страница 5: ...s Switch 3 6 3 7 3 Squelch Pushbutton 3 6 3 8 Channel Display 3 6 3 8 1 ID Display Line 3 6 3 8 2 RX Display Line 3 7 3 8 3 TX Display Line 3 7 3 9 Channel Editing 3 8 3 9 1 SELECT Switch 3 8 3 9 2 NEXT Switch 3 9 3 9 3 EDIT Switch 3 9 3 9 4 HELP Switch 3 9 3 10 Status Editing 3 10 3 10 1 NEXT and SELECT Switch Use 3 10 3 10 2 Status Edit Features 3 11 3 11 Tones 3 12 3 11 1 General 3 12 3 11 2 To...

Страница 6: ...PX138N Series covers a frequency range of 138 000 MHz to 173 995 MHz in 5 0 6 25 kHz increments Each of the 100 available channels can include a receive frequency and CTCSS tone transmit frequency and CTCSS tone and an alpha numeric identifier A SCAN function allows scanning of selected channels Transmit power of either 1 watt or 10 watts is selectable from the front of the NPX138N Simplex and sem...

Страница 7: ...MHz Tone capability 38 standard CTCSS tones Operating mode simplex or semi duplex 1 4 1 1 Receiver Channel increments 5 kHz 6 25 kHz Audio output 100 mW 600 Ω Balanced Unbalanced Sensitivity Main 0 5 μV max 12 dB SINAD Guard 0 5 μV max 12 dB SINAD Spurious response rejection 70 dB Adjacent channel rejection Wideband 70 dB min 25 kHz Narrowband 60 dB min 12 5 kHz Intermodulation rejection 70 dB Hum...

Страница 8: ...6 inches 194 6 mm Width 5 75 inches 146 1 mm Weight 3 0 lbs 1 4 kg Mounting Standard Dzus mounting 4 fasteners Connector type 25 pin D subminiature male pins Antenna connector BNC female 1 4 3 Environmental Specifications Operating temperature 30 C to 60 C Altitude 25 000 feet Humidity 95 Vibration DO 160C Cat M 1 5 Unit Nomenclature Variants of the NPX138N series radios are identified as follows ...

Страница 9: ... lighting power used NPX138 N 000 0 28 Vdc Lighting 1 14 Vdc Lighting 2 28 Vdc NVG NVIS A Compliant 5 5 Vdc Lighting 7 28 Vdc NVG Compatible Lighting 8 14 Vdc NVG Compatible Lighting 9 5 Vdc NVG Compatible Lighting 1 5 3 Special Options The digit in the second position of the unit suffix indicates any special options installed NPX138 N 000 0 No Special options installed 5 USFS Standard Guard 6 Cus...

Страница 10: ...signated warranty repair center or any labour to remove or re install the defective unit in the aircraft Contact Northern Airborne Technology Ltd for any questions regarding this warranty its applicability to your units and or for return authorization Northern Airborne Technology Ltd is the final arbitrator concerning warranty administration Units which have been physically damaged burned immersed...

Страница 11: ...hort wire to a clean ground not jumpered to the power ground wire connection Refer to the aircraft structural repair manual and maintenance manual for instructions and information pertinent to this installation 2 4 4 Cabling and Wiring All wire shall be selected in accordance with the original aircraft manufacturer s Maintenance Instructions or AC43 13 1B Change 1 Paragraphs 11 76 through 11 78 Un...

Страница 12: ...f 12 ft from aircraft navigation receiver antennas and a minimum of 4 feet from aircraft communications and ELT antennas Be careful not to choose separations that closely approximate or whole number multiples of the navigation or communications system wavelength Note Avoid any placement that puts antennas of like frequencies close together Bottom mounted antennas will perform best in flight but po...

Страница 13: ...nd volume levels as required b Check all transmit and receive functions Ensure the RX TX status indicator lights green when the radio is keyed to transmit and amber when receiving c Check the SCAN function Note It may not be possible to hear the received audio if the tones do not match those set in the radio To avoid any confusion tones should be set to OFF via the status edit mode during scanning...

Страница 14: ...ion Approval Test Procedure see section 2 5 and the test results documented on the record sheets 2 5 Installation Drawings DOCUMENT REV DESCRIPTION TYPE NPX138 403 0 1 50 Panel Mount Radio Interconnect 2 sheets NPX138 405 0 1 20 Panel Mount Radio Connector Map NPX138 634 0 1 10 Post Installation EMI Test Installation Approval Test Procedure NPX138 905 0 1 50 Panel Mount Radio Faceplate NPX138 922 ...

Страница 15: ...GRAMMING PORT ALT MIC KEY 16 NOTE 5 NO CONNECTION TO THIS PIN RESERVED FOR ALT MIC Hl 17 8 OTHER FEATURES FUTURE UPGRADES 6 ALL WIRES SHOULD BE 22 AWG UNLESS OTHERWISE SPECIFIED ALL UNSHIELDED WIRE SHALL CHASSIS GROUND 23 BE SELECTED IN ACCORDANCE WITH THE ORIGINAL m NOTE 10 AIRCRAFT MANUFACTURERS MAINTENANCE INSTRUCTIONS OR AC43 13 1B CHANGE 1 PARAGRAPHS 11 76 THROUGH 11 78 WIRE TYPES BNC MALE SH...

Страница 16: ...CONNECTION TO THIS PIN RESERVED FOR CHASSIS GROUND 23 CHANNEL DNI OTHER FEATURES FUTURE UPGRADES m 5 ALL WIRES SHOULD BE 22 AWG UNLESS OTHERWISE SPECIFIED ALL UNSHIELDED WIRE SHALL BE SELECTED IN ACCORDANCE WITH THE ORIGINAL BNC MALE AIRCRAFT MANUFACTURERS MAINTENANCE I3 r RG58C U r INSTRUCTIONS OR AC4J 1J 1B CHANGE 1 ANTENNA RF PARAGRAPHS 11 76 THROUGH 11 78 WIRE TYPES SHOULD BE TO MIL W 22759 AS...

Страница 17: ... 3 J 0 3 3 I I 0 __J 0 J 0 x 0 0 0 4 z __J 0 0 _ _ _J _J 0 w 0 w w x J J 0 z __J 4 f u u 4 4 0 f z w f 0 0 u 0 Cf 4 z 4 4 IX q w u f I z 0 f N 2 u __J u 4 4 IX IX w 2 w 4 I __J 0 f z N N u w u 4 l w 0 __J Cf 0 4 0 w Cf 0 w Cf SOLID CIRCLES DENOTE INTERNALLY CONNECTED GROUND PINS VIEW REAR SIDE OF AIRFRAME CONNECTOR TYPE AIRFRAME CONNECTOR IS 25 PIN D SUBMINIATURE FEMALE SOCKETS 1Confldentlal and P...

Страница 18: ...ncies indicated and selected for display If possible set up a VOR ILS ramp test set on the frequencies indicated and adjust the output until the flags are out of view The transponder and encoder should be monitored with ramp test equipment If possible set the ADF to a nearby navigation station Modulate the NPX138 transmitter on the indicated frequencies for at least 20 seconds Observe the GPS for ...

Страница 19: ...38 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 A complete discussion of all the standards of airworthiness to be applied in assessing EMI effects is beyond the scope of this document 5 Procedure A Operate the NPX138 transmitter on the following frequencies for at least 20 seconds Observe...

Страница 20: ...ransmitter on the following frequencies for at least 20 seconds Listen for any noise or detected audio signals on the VHF comm Example Bendix King KY 196A The first IF frequency is 11 4 MHz The L O is above the received frequency high side injection therefore the image frequency is 22 8 MHz above the selected frequency Set the KY 196A to 120 000 MHz and the NPX138 to 142 8000 MHz FREQUENCIES RESUL...

Страница 21: ... one in the VOR frequency range Record these values in the spaces provided in the following chart Modulate the NPX138 transmitter on the following frequencies for at least 20 seconds Listen for any noise or detected audio signals on the receiver audio look for any movement of flags or needles on the navigation display FREQUENCIES RESULTS VOR ILS 1 NPX138 PASS FAIL 108 000 162 0000 108 100 162 1500...

Страница 22: ...SULTS G S 2 NPX138 PASS FAIL 334 7 108 1 167 3500 NOTES Note For the following tests select frequencies at the top middle and bottom of the range of the NPX138 Frequency 1 ______________ Frequency 2 ______________ Frequency 3 ______________ E At a safe altitude engage the autopilot or stability augmentation system Modulate the NPX138 transmitter on the above frequencies for at least 20 seconds Obs...

Страница 23: ... for each different system such as ILS 2 GPS FMS etc Observations G List the power plant fuel and other electric instruments in the chart provided and note any anomalies that occur while transmitting Assess the results STEP SYSTEM PASS FAIL NOTES 1 Xponder Encoder 2 ADF 1 2 3 VG 4 Compass 5 Directional Gyro 6 Oil Pressure 7 Fuel Pressure 8 Oil Temp 9 Amps 10 Bus Voltage 11 Fuel 12 Ng 13 TOT 14 Tor...

Страница 24: ... FORM 634 0100 DOT CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD STEP SYSTEM PASS FAIL NOTES NOTES End of Installation Approval Test Procedure The document reference is online please check the correspondence between the online documentation and the printed version ...

Страница 25: ... AUG 07 02 MWS Bv SaNNORM GDTX OFF GD1 NPX FM TRANSCEIVER GD2 D DISP CHAN BRIGHT EDIT SO MIN 1 10 TX CH ST 0 RX SELECT NEXT 1 1 HELP CONFIDENTIAL AND PROPRIETARY TO NAT LTD DESIGNED KEH DRAWN KEH f nat NORTHERN AIRBORNE TECHNOLOGY LTD DATE APR 27 95 TITLE NPX138 PANEL MOUNT CHECKED NAT TRANSCEIVER 241 NAT SIZE CAGE CODE PART NO REV SHEET APPROVED A 3AB01 NPX138 1 50 1 2 113 FILE 905 0150 DWG DWG T...

Страница 26: ...DANCE WITH ASME Y14 5M 1994 2 WEIGHT 3 3 lbs 1 5 Kg MAX 2 7 lbs 1 23 Kg MIN CONFIDENTIAL AND PROPRIETARY TO NAT L TD TOLERANCES UNLESS DIMENSIONS DESIGNED KEH STATED OTH ERWI SE 1 N N C H Eîsct DR A W Nc K E Hç n a t N O R T H E R N A IR B O R N E _T E _ C H N O L O G Y L T D O X 0 030 rTHIRD ANGLE O XX 0 010 PROJECTION DATE APR 27 95 TITLE o xxx 0 005 AT NAT O XXXX 0002 E3 CHECKED ANGLE 0 5 DEG 0...

Страница 27: ...ode of the radio For this reason they have multiple labels When the radio is in Normal mode EDIT switch in the center Off position use the top label and when the radio is in Edit mode either CH or ST use the bottom label 3 3 Controls and Indicators In addition to the general functions that are available on other FM radios the NPX138N has several features that extend its capability and make it easi...

Страница 28: ...orial on the operation of the radio To advance through the tutorial press HELP after reading each screen To exit this initial HELP function at any time move the NEXT switch momentarily left or right 3 4 2 Initial Operating Display If Help is declined by using the NEXT switch as directed the radio will display a summary of the installed functions and current settings this feature can be disabled at...

Страница 29: ...er details on the Channel Display Brightness Control Channel Display Mode The lower row of the display contains information related to specific radio functions Normally it shows the settings for the power level and the CTCSS tones However entering the Status edit mode allows the display of other function settings See section 3 10 for further details on displaying and changing Status information Th...

Страница 30: ...el is active with radio traffic of some kind A radio that is receiving may still not produce any audio if the tones present on the receive signal do not match the tones set in the radio See section 3 11 for further details on how CTCSS tones work 3 6 3 Scan Guard TX Switch When this switch is in the SCAN position the radio will begin scanning See section 3 12 for further details on scanning When t...

Страница 31: ...ch Pushbutton The General Controls are those labelled in the above diagram and affect the over all operation of the radio The position of the EDIT switch determines the operating mode of the radio The other three controls the two center off momentary switches and the pushbutton have dual functions operating differently depending upon the selected operating mode When the EDIT switch is in the cente...

Страница 32: ... Display Line The ID line includes the channel number the channel label or name the scan list flag and the priority scan channel flag A typical ID display line might look like this 01 FORESTRY sc p1 Channel Label Scan Flags The label for each channel is an alphanumeric name that may be up to 10 characters long The channel name has no effect on radio operation and is provided for operator convenien...

Страница 33: ...uelch control The radio has several different methods by which to display the tone See section 3 11 for further details on tones 3 8 3 TX Display Line The TX line includes the channel number the transmit frequency and the transmit tone A typical TX line might look like this 01 156 8750t 91 Channel TX Freq TX Tone When the microphone is keyed the radio will transmit an FM signal that has a carrier ...

Страница 34: ...cies is not possible Only those frequencies the radio recognizes as valid are enterable and only in the fractional multiples allowed To edit channel information use the DISP switch to select the required data line for editing ID RX or TX and then enter Channel Edit mode To enter Channel Edit mode pull and lock the EDIT switch to the left CH The position or character to be edited will blink This bl...

Страница 35: ... set to and one position to the left if momentarily set to The cursor will wrap around when it reaches either end of the line The editor will change what choices are valid as the cursor moves from one character to the next Sometimes more than one character will flash This is because the only valid choices involve multiple characters such as the fractional kHz entry for a channel frequency This is ...

Страница 36: ...t switch does not change any information To edit status line data pull and lock the EDIT switch to the right ST Select Setting Display Next Function Status Edit Help 3 10 1 NEXT and SELECT Switch Use Toggling SELECT will step to the previous next available setting for the current function To advance to the next function toggle NEXT Use the SELECT switch to again choose the desired setting and cont...

Страница 37: ...nly the transmit tone but not the receive one See section 3 9 for further details on tones TONE DISP The radio permits the user to define the tone presentation to suit local operations This selection can be for the tone frequency itself truncated to whole Hz referred to as FREQ or it can be one of several codes The sequential numbers for the EIA tones are 1 38 The alphanumeric Motorola codes are r...

Страница 38: ...ate tones for each channel The operator can set different tones for receive and transmit Select if no tone is required By editing the TONE DISP status line the operator can configure the radio to display the tones using one of four different methods The four tone display modes are Tone Frequency FREQ This is the actual frequency of the tone measured in Hertz cycles second There are only three digi...

Страница 39: ...7 07 YA 88 5 8 08 YB 91 5 9 11 ZZ 94 8 10 12 ZA 97 4 11 13 ZB 100 0 12 14 1Z 103 5 13 15 1A 107 2 14 16 1B 110 9 15 17 2Z 114 8 16 18 2A 118 8 17 21 2B 123 0 18 22 3Z 127 3 19 23 3A 131 8 20 24 3B 136 5 21 25 4Z 141 3 22 26 4A 146 2 23 27 4B 151 4 24 28 5Z 156 7 25 31 5A 162 2 26 32 5B 167 9 27 33 6Z 173 8 28 34 6A 179 9 29 35 6B 186 2 30 36 7Z 192 8 31 37 7A 203 5 32 38 M1 210 7 33 41 M2 218 1 34...

Страница 40: ... U S Forest Service contracts for example where the tones are needed only to open the repeater and serve no RX squelch function 3 12 Scanning tc 1 4 10 Scanning 3 12 1 General Scanning is an automatic internal function that rapidly samples a selected group of channels It is very useful for checking radio traffic on one or more channels while still working a home or monitor channel When scanning is...

Страница 41: ...PX138N channel can be designated as a PRIORITY channel and or a LIST channel The appropriate scan flags will appear after the channel name on the ID line p1 and or sc Any or all of the channels can be in the scan list for LIST SCANNING but only one channel can have the Priority designation Use the status edit mode to select both the priority channel and the SCAN MODE Use the channel edit mode to t...

Страница 42: ... a faint tick when occurring during other reception If there is activity on the designated p1 channel the radio will re channel to that frequency regardless of activity on other channels The radio will return to the home channel 2 3 seconds after activity on the priority channel has ceased LIST PRIORITY Scanning In this mode both LIST and PRIORITY features are combined so that the radio checks lis...

Страница 43: ...witch into the CH position b Turn on the radio The Lock EDIT switch OFF for Norm OP message should appear c Press the HELP button The PASSWORD message should appear d Although there is no cursor on the screen use the SELECT and NEXT controls to enter the configuration mode password which is IAC Be sure to use the NEXT switch after entering the last character The Config Mode screen should appear e ...

Страница 44: ...ST FREQ 138 150 Sets the lower limit in MHz for frequency editing All NPX138N radios can be selected to either option CHANS INST 20 40 60 80 100 The number of channels available in the radio Does NOT include guard channels TX TIME OUT 000 030 060 090 240 The time in seconds the Transmitter is allowed to be active for one continuous period Intended to prevent stuck mic conditions from damaging the ...

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