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VHF Transceiver Manual 

 

SM05 Rev 4.00 

 

Page 1-4 

Nov 26, 2003 

ENG-FORM: 800-0107.DOT 
 

CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.

 

1.4.3   

Receiver 

Specifications 

        

Sensitivity 

 

 

 

 

0.35 uV (EIA 12 dB SINAD) typical 

 

    Normally 

set 

to 

0.6 

uV 

 
Selectivity (EIA 2-signal method,    

-80 dB 

 25kHz 

channels) 

 
Spurious 

Response 

   -85 

dB 

 
Audio Output  

 

 

 

Phones-Nominal 600 ohm line output 

 

     100 

mW 

minimum 

 

     (Transformer 

coupled 

output) 

 

 

 

 

 

Speaker-Nominal 4 W into 8 ohms. 

 

     (Bridge 

output, 

DO 

NOT 

GROUND) 

1.5 

 Unit Nomenclature 

 

 

 

 

 

 

 

 

 
Tac/Com transceivers are identified by two groups of numbers.  The first defines the 
frequency band, and the second defines any optional attributes of the R/T. 
 
Part numbers: 
 

 

NT150-000 W/R  

Í

 Denotes Weight Reduced 

 

 

      

Ï

       

Ñ

 

Defines Frequency Band   

Defines Options 

 
The options currently available are as follows: 
 
 

-050   

Separate 2 channel dedicated receiver module with   

 

 

 

USFS/OAS channels installed (NT150 only). 

 
 

-060   

Separate 2 channel dedicated receiver module with user  

 

 

 

defined guard channels (Some restrictions may apply). 

 
 

-100   

Separate DF Receiver (DF100-001), which will allow NT136  

 

 

 

and NT150 transceivers to operate with NAT's TDF System. 

 
 

-EUR   

Transceiver modification to provide improved adjacent  

 

 

 

channel rejection for compliance with European  

 

 

  specifications. 

 
 -EXT 

 

Transceiver 

modification 

to allow the NT30B extended range 

 

 

 

of 33 to 50 MHz. 

 

   End 

of 

Section 

1.0 

 

Summary of Contents for NT030

Page 1: ...C COM SERIES VHF TRANSCEIVERS NT030 NT150 INSTALLATION AND OPERATION MANUAL REV 4 00 November 26 2003 Northern Airborne Technology Ltd 1925 Kirschner Road Kelowna BC Canada V1Y 4N7 Telephone 250 763 2232 Facsimile 250 762 3374 Copyright 2003 by Northern Airborne Technology ...

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Page 3: ...ORTHERN AIRBORNE TECHNOLOGY LTD Periodically NAT will release manual amendments In order to maintain the most accurate and up to date manual these amendments should be carried out immediately upon receipt and recorded on the following amendment record AMENDMENT RECORD Amendment Amend Date Date Entered Entered By ...

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Page 5: ... 4 Specifications 1 2 1 4 1 System Specifications 1 2 1 4 2 Transmitter Specifications 1 3 1 4 3 Receiver Specifications 1 4 1 5 Unit Nomenclature 1 4 2 0 Installation 2 1 General 2 1 2 2 Unpacking and Inspection 2 1 2 3 Installation Procedures 2 1 2 3 1 Warnings 2 1 2 3 2 Cautions 2 2 2 3 3 Cabling and Wiring 2 2 2 3 4 Mechanical Mounting 2 3 2 3 5 Antenna Selection Guide 2 5 2 3 6 Post Installat...

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Page 7: ...32 frequencies within 2 pages of non volatile memory any or all of which can be altered by the Tac Com system control head as needed by the operator 1 2 Purpose of Equipment These transceivers are designed to meet the difficult airborne requirements of law enforcement and public service public safety groups for tactical FM communication systems The Tac Com series of radio control heads provide a c...

Page 8: ...rational cycles This is a significant departure from many existing systems which are at design limits even with low duty cycles A wide range energy conversion power supply is used in the transceivers for 28VDC operation which significantly reduces both current consumption from the aircraft bus and waste heat generation All transceivers have the same mounting footprint RF connector and plug compati...

Page 9: ... GE Voice Guard Transcrypt Shock EIA and MIL STD 810D Dimensions 2 7 x 8 0 x 14 0 W R Version H x W x D 2 7 x 9 5 x 13 3 Weight less accessories 8 5 lbs W R Version 9 5 lbs Alternate 5 0 12 5 kHz spacing available on NT150 when used with Tac Com II controls On NT136 PAS Tac Com II provides 5 0 6 25 kHz spacing for European applications 1 4 2 Transmitter Specifications Conducted Spurious 80 dB 70 d...

Page 10: ... defines the frequency band and the second defines any optional attributes of the R T Part numbers NT150 000 W R Í Denotes Weight Reduced Ï Ñ Defines Frequency Band Defines Options The options currently available are as follows 050 Separate 2 channel dedicated receiver module with USFS OAS channels installed NT150 only 060 Separate 2 channel dedicated receiver module with user defined guard channe...

Page 11: ...anual b Verify that all items are present before proceeding and report any shortage immediately to your supplier c Complete the warranty card information and send it to NAT when the installation is complete If you fail to complete the warranty card the warranty will be activated on the date of shipment from NAT 2 3 Installation Procedures 2 3 1 Warnings ÍIMPORTANT Do not bundle any lines from this...

Page 12: ...wer to this system must be supplied from a separate breaker or fuse and not bundled to any other source to prevent inadvertent system failure A 3A slow blow fuse or breaker is suggested for all models except the NT030B which should use a 5A slow blow fuse or breaker 28 VDC Source Coax cable should be RG 58C U or similar mil grade full coverage coax cable At UHF frequencies use of double shielded R...

Page 13: ... Try to mount the transceiver close to the intended antenna location as long cable runs will dramatically increase losses to the antenna 2 3 4 2 Cabling Installation cabling MUST allow the unit to be easily withdrawn for removal Ensure an adequate service loop is allowed in the routing of the cable Do NOT bundle the RF coax cable with the channeling wires Ground the transceiver with as short a gro...

Page 14: ...ace metallic grounded material equal in radius to the height of the antenna as an absolute minimum Poor grounding will result in severe reflected power and high levels of RFI throughout the airframe Keep cable bends to a minimum at the antenna and use 90 degree elbow adapters if sharp bends are required Avoid antenna locations that will become fouled with oil water fuel or dirt as this will degrad...

Page 15: ...ong with an interface adapter from NAT RS12 020 Antennas with losses of over 6dBi dB with respect to isotropic source will dramatically reduce transmit power and receive sensitivity Special order fixed tuned narrow bandwidth single frequency whips are available from Comant Spiral wound aircraft CB whip antennas Antenna Specialist etc can also be cut down in length to produce resonant antennas with...

Page 16: ...ollowing measurements on the airframe female cable end connector i Check pin 1 and 2 for 28VDC relative to ground ii Check pins 14 and 15 for continuity to ground below 0 1 ohms iii Check pin 6 for PTT action closure to ground when keyed and pin 5 for mic connection Note that these are commonly reversed by accident and will result in transceiver keying but no modulation iv Check pins 11 and 24 for...

Page 17: ... line wattmeter and suitable frequency elements to Ensure correct antenna matching Reflected power in excess of 25 represents a serious problem and should be investigated carefully or serious RFI and system interference as well as possible radio damage may result Check that forward power is to specifications over the required band as specified for the radio in use 2 3 6 3 Diagnostic Hints Ensure a...

Page 18: ...ems are encountered Ensure that there is not any interaction with Tac Com control head operation and ADF performance Relocation or re routing of the interconnect cabling may be required if interference exists 2 3 6 5 Final Inspection Before leaving the aircraft Ensure that ALL THE MATING CONNECTORS ARE SECURELY FASTENED TO THE TAC COM CONTROL HEAD Also Ensure that the unit is securely fastened to ...

Page 19: ... NT Series Transceiver Interconnect NT150 050 403 0 1 12 N I F to NT150 050 Transceiver Interconnect NT150 403 1 T I F to NT Series Transceiver Interconnect GEVOICE GRD 403 B N I F to NT Series Transceiver GE Voice Guard Interconnect NT WR 927 0 1 10 Weight Reduced NT Series Transceiver Mechanical HS10 001 922 0 1 10 1 Radio Horiz Mounting Tray For W R Transceiver Mechanical HS20 001 922 0 1 10 2 ...

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Page 55: ...ion 3 1 General The NT Series radios can only be operated by the Tac Com Control Head All the operations of the RT are defined and manipulated by the operational features of the Control Head For details regarding Control Head and NAT RT operation see SECTION 3 0 OPERATION in the TAC COM CONTROL HEAD INSTALLATION AND OPERATION or SERVICE MANUAL End of Section 3 0 ...

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