FRWRT-138NAirborne transceiver 138 to 174 MHz

C-1000/S OPERATOR'S MANUAL INTRODUCTION This Operator's Manual contains detailed information to assist you in the proper operation of the C-1000/S Control Head. Refer to the picture on the following page as you read the operating instructions. PURPOSE OF EQUIPMENT The C-1000/S control unit is designed for use with Wulfsberg's Flexcomm communication systems. Flexcomm provides FM communications in low band VHF, high band VHF, UHF and VHF AM. Flexcomm provides total flexibility for interagency communications. The units provide channeling capability for all the FM bands plus the air traffic control band. The C-1000/S is a fully frequency-agile control unit. It provides the ability to thumbwheel control all of the authorized Flexcomm system channels. It also provides 30 programmable preset channels. And the programming capability to change any of the preset channel frequencies is built into the control unit. This built-in operator programming capability can be disabled if the user desires. Transceivers must be used only on your specifically authorized frequencies. NOTE: The C-1000/S Control Unit has shop accessible mode of operation selector switches. The configuration of the switches alters the operation of the control and the configuration must be known to properly utilize the features of the C-1000/S. Features and capabilities of the C-1000/S that may be internally enabled/disabled are: ! THUMBWHEEL LIGHTING - normally the thumbwheels are back-lit continuously for night use but may be internally disabled. ! FREQUENCY AND TONE DISPLAY - normally the display is off except when the present RCV/XMT switch is depressed either to preset channel frequency and tone information or to re-program the channel information. The display may be configured internally for the display to be on continuously. ! GUARD CHANNEL PROGRAMMING - may be internally disabled. ! PAGE A AND B CHANNEL PROGRAMMING – may be internally disabled for page A or page B channels or both. ! MANUAL SIMPLEX CHANNEL - may be internally restricted to receive only. ! CHANNEL MEMORY DISCRETE OUTPUTS – may be shop programmed with each channel to provide control of external accessory equipment. Should the operator re-program a channel without access to the internal switches, pre-programmed channel memory discrete information may be lost. If the unit has been modified for narrow/wide band operation, memory discrete number two will not be a user- defined discrete output. DESIGN FEATURES ! The C-1000/S is designed for ease of operation, maintenance and installation. ! Channel Memory retention maintained with no power applied. Some restrictions may apply with S version installations. ! All Flexcomm control units are interchangeable within the system wiring. ! Guard channel transmit frequencies and tones. ! Five Channel Memory Discrete Outputs (four when modified for narrow band); shop programmable with each channel. ! Direct/Repeat feature. ! Integral front panel lighting. FREQUENCY SELECTION AND DISPLAY Please note that the international aircraft standard is used in the frequency selection and frequency presentation of the 0.5 kHz frequencies. That is: 154.320 reads 154.320 154.3225 reads 154.322 464.325 reads 464.325 464.3275 reads 464.327 CONTROL OPERATION The following describes the operation of each operator accessible control knob, switch or indicator: ! PRESET CHANNEL SELECTORS: Allows selection of 30 channels of pre-programmed frequencies, tones and Channel Memory Discretes. ! TEST/LOAD Switch: Disables the receiver squelch, also, when activated simultaneously with the Preset switch, loads preset frequencies, tones and five Channel Memory Discretes. ! PRESET - RCV/XMT Switch: Used in conjunction with the LOAD/TEST Switch, selects either receive or transmit half of channel memory. Activates seven segment frequency and tone LED displays. ! MAIN RECEIVER Squelch Lamp: Indicates signal on Main Receiver. Dims automatically. ! GUARD RECEIVER Squelch Lamp: Indicates signal on Guard Receiver. Dims automatically. ! ON/OFF/VOLUME Control ! TONE - ON/OFF/MNL Switch: Allows manual selection of transmitted tone by way of thumbwheel TONE selectors in MNL position, allows Main and Guard tone squelches to operate in the ON position, and allows Main and Guard receiver tone squelches to be disabled in either the MNL or OFF positions. In either the OFF or MNL positions the receiver's squelches operate via their noise squelch circuitry. ! T/R SELECT Switch -MAIN/BOTH/GUARD: In the MAIN position - enables the Main Receiver only and transmits on the main channel selected. In the BOTH position - enables both the Main and Guard Receivers and transmits on either the main or guard channel (dependent on the XMTR-MN/GD switch); in the GUARD position - enables only the Guard Receiver and transmits on the selected guard channel. ! XMTR - MN/GD Switch: Selects either main channel or guard channel during transmitter operation only if the T/R-MAIN/BOTH/GUARD switch is in the BOTH position. ! XMTR Lamp: Indicates transmitter operating, dims automatically. ! RPT/DIR Switch: Selects transmitter to operate on different frequency than receiver (RPT) or same frequency as receiver (DIR) during main channel operation. Selects one of two guard channels during guard channel transmitter operation and during guard transmit channel programming. ! FREQUENCY and TONE Selectors: Internally lighted thumbwheels used in manual selection and programming of frequencies and tones. Lighting may be disabled by means of an internal switch. ! N/W SWITCH: Selects either Narrow or Wide Band operation. When N is selected and the channel selector switch is on M, an LED lights in the lower right corner of the kHz display. The LED also lights when a preset memory channel has been programmed for narrow band. PRESET CHANNEL PROGRAMMING INSTRUCTIONS Turn the equipment On by rotating the MAIN ON/OFF volume control clockwise. Aircraft or vehicle power must be available to the unit by operating the approp…

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! Page 1 Memo To: Frank Coperich From: Robert DeLong CC: Date: 06/06/00 Re: RT-138 Operation questions Dear Frank, Following are the answers to your questions regarding certification of our radio FCC ID FRWRT-138N. 1) Compliance with FAR 80.203(b): The control head for the RF-138N is design with an internal switch to disable channel programming or manual transmitter tuning. This switch is activated by the service technician to allow channel programming for system setup. Once channel programming has been completed, the switch would be deactivated. At that time, transmission is only possible on the preprogrammed channels. 2) Compliance with FAR 80.871(d): The RT-138N covers the frequency range of 138.00 to 173.9975. It is capable of semi-duplex or simplex operation. The radio is tunable in 12.5 kHz or 25 kHz steps and meets the requirements of 80.143. 3) Compliance with FAR 90.203 (e): For RT-138N operation on ground installations, channel programming is activated via an internal switch by a radio technician. After the authorized channels are programmed, programming is disabled by the internal switch before the unit is returned to operation. For operation in aircraft installations, under 90.203(h) and 90.423 the internal switch may be left in the enable position to allow programming by the pilot. Please let me know if you require additional information. Best regards, Robert DeLong Wulfsberg Electronics

ARCHIVE 1/150-040214.A.DOCREV APage 1 of 1 1 LABEL LOCATION The label location is shown on the front and side view external pictures of the unit. The Part 15 label and the FCC ID labels are affixed to the top of the box. The serial number tag, which contains the old FCC ID, will remain on the front of the unit. 2 EQUIPMENT IDENTIFICATION LABEL: THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE CONDITION THAT THIS DEVICE DOES NOT CAUSE HARMFUL INTERFERENCE.

Wulfsberg Electronics Division A Chelton Group Company RT-138 TRANSCEIVER NARROW-BAND CONVERSION Maintenance Manual Addendum Manual Number 150-040699 Revision A April 27, 2000 RT-138 NARROW-BAND CONVERSION MAINTENANCE MANUAL ADDENDUM Manual Number 150-040699Page ii27 Apr 00 Revision A Wulfsberg Electronics Division A Chelton Group Company Information in this manual is subject to change without notice. No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, without express written permission of Wulfsberg Electronics Division. Wulfsberg Electronics Division makes no warranty, expressed or implied, with regard to this manual, including but not limited to any implied warranties of merchantability, fitness for a particular purpose, and non- infringement. In addition, Wulfsberg Electronics Division makes no warranty with regard to the documentation or data contained herein. Wulfsberg Electronics Division is not liable in the event of incidental, special, consequential, or any other damages in connection with or arising from furnishing, performance, or use of this manual.  2000 Wulfsberg Electronics Division. All rights reserved RT-138 is a trademark of Wulfsberg Electronics Division. RT-138 NARROW-BAND CONVERSION MAINTENANCE MANUAL ADDENDUM 27 Apr 00Page iiiManual Number 150-040699 Revision A Wulfsberg Electronics Division A Chelton Group Company Record of Revisions Revision Number Issue Date Date InsertedBy Revision Number Issue Date Date InsertedBy A04/27/00 RT-138 NARROW-BAND CONVERSION MAINTENANCE MANUAL ADDENDUM Manual Number 150-040699Page iv27 Apr 00 Revision A Wulfsberg Electronics Division A Chelton Group Company List of Effective Pages SectionPageRevision Cover SheetA CopyrightiiA Record of RevisionsiiiA List of Effective PagesivA Table of ContentsvA List of FiguresviA 1 Introduction 1A 2 Theory of Operation 2A 3A 4A 3 Maintenance 5A 6A 4 Schematic Diagrams 7A 8A 5 Parts Listing 9A RT-138 NARROW-BAND CONVERSION MAINTENANCE MANUAL ADDENDUM 27 Apr 00Page vManual Number 150-040699 Revision A Wulfsberg Electronics Division A Chelton Group Company Table of Contents Page Section 1Introduction 1.1Overview...........................................................................................................................................1 1.2Audience...........................................................................................................................................1 1.3References.........................................................................................................................................1 Section 2Theory of Operation 2.1General..............................................................................................................................................2 2.2Operational Block Diagram...............................................................................................................2 2.3Narrow Banded Audio Board Circuit Theory...................................................................................2 2.3.1Narrow Band Gain Boost..................................................................................................................4 2.3.2Narrow Band Gain Reduction...........................................................................................................4 Section 3Maintenance 3.1Disassembly......................................................................................................................................5 3.2Test Equipment.................................................................................................................................5 3.3RT-138 Overall Performance Tests...................................................................................................5 3.3.1Transmitter Deviation Capability......................................................................................................5 3.3.2Transmitter Deviation Limiter...........................................................................................................5 3.3.3Transmitter CTCSS...........................................................................................................................5 3.4Troubleshooting................................................................................................................................5 3.4.1Audio Board Troubleshooting Procedure..........................................................................................5 3.5Alignment Procedures.......................................................................................................................6 Section 4Schematic Diagrams 4.1Assembly and Component Numbers.................................................................................................7 Section 5Parts List 5.1General..............................................................................................................................................9 RT-138 NARROW-BAND CONVERSION MAINTENANCE MANUAL ADDENDUM Manual Number 150-040699Page vi27 Apr 00 Revision A Wulfsberg Electronics Division A Chelton Group Company List of Figures Page Figure 2-1RT-138 Narrow-Band Audio Board Block Diagram.........................................................................3 Figure 2-2RT-138 Narrow-Band Audio Board Schematic Diagram..................................................................3 RT-138 NARROW BAND CONVERSION MAINTENANCE MANUAL ADDENDUM 27 Apr 00Page 1Manual Number 150-040699 Revision A Wulfsberg Electronics Division A Chelton Group Company Section 1Introduction 1.1Overview This addendum contains information pertaining to the RT-138 narrow band conversion. 1.2Audience This manual is intended for qualified aircraft avionics technicians in authorized maintenance and repair facilities. 1.3References Wulfsberg Electronics RT-138 Maintenance Manual, P/N 150-0101-000. RT-138 NARROW BAND CONVERSION MAINTENANCE MANU…

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ARCHIVE 1 150-040684.A.DOCPage 1 of 24 APPLICATIONREVISIONS REV A NEXT ASSEMBLYFINAL ASSEMBLYREVDESCRIPTIONDATEAPPROVED AINITIAL RELEASE PER DCN W Vern Wallace SH 1 DWG. NO . 150-040684 THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF WULFSBERG ELECTRONICS DIVISION, A CHELTON GROUP COMPANY. NEITHER RECEIPT NOR POSSESSION THEREOF CONFERS ANY RIGHT TO REPRODUCE, OR USE, OR DISCLOSE, IN WHOLE OR IN PART, ANY SUCH INFORMATION WITHOUT WRITTEN AUTHORIZATION FROM WULFSBERG ELECTRONICS DIVISION. APPROVALSDATE DRAWN Vern Wallace 4/26/2000 TITLE: TYPE ACEPTANCE REPORT MODEL RT-138 FCC ID: FRWRT-138N CHECKED Don Ellis 4/26/2000 ENGINEER Robert DeLong 4/26/2000 SIZE A CAGE CODE 1B7G3 DWG. NO. 150-040684 REV A ISSUED Vern Wallace 4/26/2000SCALE NONE ARCHIVE 1/150-040214.A.DOCREV APage 2 of 19 TABLE OF CONTENTS 1INTRODUCTION..............................................................................................................................4 2TEST FACILITIES............................................................................................................................4 3CERTIFICATION OF DATA.............................................................................................................5 4EXPOSITORY STATEMENTS; Paragraph 2.983 (a) - (d):..............................................................6 4.1Name of Applicant; Paragraph 2.983 (a):............................................................................6 4.2Identification of Equipment; Paragraph 2.983 (b):...............................................................6 4.3Production Quantity; Paragraph 2.983 (c):..........................................................................6 4.4Types of Emission; Paragraph 2.983 (d) (1):......................................................................6 4.5Frequency Range; Paragraph 2.983 (d) (2):.......................................................................6 4.6Power Rating; Paragraph 2.983 (d) (3):..............................................................................6 4.7Maximum Power Rating; Paragraph 2.983 (d) (4):..............................................................6 4.8DC Voltage and Current into final Amplifier; Paragraph 2.983 (d) (5):................................6 4.9Function of Semiconductors and other active devices; Paragraph 2.983 (d) (6):...............6 4.10Complete Circuit Diagrams; Paragraph 2.983 (d) (7):.........................................................6 4.11Instruction Book; Paragraph 2.983 (d) (8):..........................................................................7 4.12Tune-up Procedure at Nominal Power; 2.983 (d) (9):.........................................................7 4.13Circuitry and Devices for Determining and Stabilizing Frequency; Paragraph 2.983 (d) (10): .............................................................................................................................................7 4.14Circuits for Suppression of Spurious Radiation, Limiting of Modulation and Limiting of Power; Paragraph 2.983 (d) (11):........................................................................................7 5TEST PROCEDURES AND CONDITIONS......................................................................................7 5.1Measurement Procedures; Paragraph 2.947 (a), (b), (c):...................................................7 5.2Test Equipment; Paragraph 2.947 (d):................................................................................7 5.3Test Conditions for Transmitter Type Acceptance Test:.....................................................8 6MEASUREMENT DATA FOR TYPE ACCEPTANCE......................................................................8 6.1RF Power Output; Paragraph 2.985 (a):.............................................................................8 6.1.1Test Set-up:.........................................................................................................................8 6.1.2Power Measurements:.........................................................................................................8 6.2Modulation Characteristics; Paragraph 2.987:....................................................................8 Test setup for Frequency Response and Limiting:...........................................................................9 6.2.2Frequency Response; Paragraph 2.987 (a)........................................................................9 6.2.3Measured Frequency Response:......................................................................................10 6.3Modulation Limiting Characteristics; Paragraph 2.987 (b)................................................10 Modulation Limiting Test Setup......................................................................................................11 6.3.2Measured Standard Band Limiting....................................................................................11 6.3.3Measured Narrow Band Limiting.......................................................................................12 6.4Occupied Bandwidth; Paragraph 2.989:............................................................................12 6.4.1Occupied Bandwidth Test Procedure; Paragraph 2.989...................................................12 6.4.2Occupied Bandwidth Test Setup:......................................................................................13 6.4.3Measured Standard Band Occupied Bandwidth:..............................................................13 6.4.4Measured Narrow Band Occupied Bandwidth:.................................................................14 6.5Spurious Emissions; Paragraph 2.991, 2.993:..................................................................14 6.5.1Spurious Emissions at the Antenna Terminals; Paragraph 2.991:....................................14 6.5.2Spurious Emission Test Setup:....................................................................…

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ARCHIVE 1 150-040684.B.DOCPage 1 of 19 APPLICATIONREVISIONS REV B NEXT ASSEMBLYFINAL ASSEMBLYREVDESCRIPTIONDATEAPPROVED AINITIAL RELEASE PER DCN W 05/03/2000 Vern Wallace SH 1 DWG. NO . 150-040684 THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF WULFSBERG ELECTRONICS DIVISION, A CHELTON GROUP COMPANY. NEITHER RECEIPT NOR POSSESSION THEREOF CONFERS ANY RIGHT TO REPRODUCE, OR USE, OR DISCLOSE, IN WHOLE OR IN PART, ANY SUCH INFORMATION WITHOUT WRITTEN AUTHORIZATION FROM WULFSBERG ELECTRONICS DIVISION. APPROVALSDATE DRAWN Vern Wallace 4/26/2000 TITLE: TYPE ACEPTANCE REPORT MODEL RT-138 FCC ID: FRWRT-138N CHECKED Don Ellis 4/26/2000 ENGINEER Robert DeLong 4/26/2000 SIZE A CAGE CODE 1B7G3 DWG. NO. 150-040684 REV B ISSUED Vern Wallace 4/26/2000SCALE NONE ARCHIVE 1/150-040214.B.DOCREV BPage 2 of 19 TABLE OF CONTENTS 1INTRODUCTION .............................................................................................................................. 4 2TEST FACILITIES ............................................................................................................................ 4 3CERTIFICATION OF DATA ............................................................................................................. 5 4EXPOSITORY STATEMENTS; Paragraph 2.983 (a) - (d):.............................................................. 6 4.1Name of Applicant; Paragraph 2.983 (a):............................................................................ 6 4.2Identification of Equipment; Paragraph 2.983 (b):............................................................... 6 4.3Production Quantity; Paragraph 2.983 (c):.......................................................................... 6 4.4Types of Emission; Paragraph 2.983 (d) (1): ...................................................................... 6 4.5Frequency Range; Paragraph 2.983 (d) (2): ....................................................................... 6 4.6Power Rating; Paragraph 2.983 (d) (3): .............................................................................. 6 4.7Maximum Power Rating; Paragraph 2.983 (d) (4): ............................................................. 6 4.8DC Voltage and Current into final Amplifier; Paragraph 2.983 (d) (5):................................ 6 4.9Function of Semiconductors and other active devices; Paragraph 2.983 (d) (6): ............... 6 4.10Complete Circuit Diagrams; Paragraph 2.983 (d) (7):......................................................... 6 4.11Instruction Book; Paragraph 2.983 (d) (8): .......................................................................... 7 4.12Tune-up Procedure at Nominal Power; 2.983 (d) (9): ......................................................... 7 4.13Circuitry and Devices for Determining and Stabilizing Frequency; Paragraph 2.983 (d) (10): ............................................................................................................................................. 7 4.14Circuits for Suppression of Spurious Radiation, Limiting of Modulation and Limiting of Power; Paragraph 2.983 (d) (11):........................................................................................ 7 5TEST PROCEDURES AND CONDITIONS...................................................................................... 7 5.1Measurement Procedures; Paragraph 2.947 (a), (b), (c): ................................................... 7 5.2Test Equipment; Paragraph 2.947 (d): ................................................................................ 7 5.3Test Conditions for Transmitter Type Acceptance Test: ..................................................... 8 6MEASUREMENT DATA FOR TYPE ACCEPTANCE ...................................................................... 8 6.1RF Power Output; Paragraph 2.985 (a): ............................................................................. 8 6.1.1Test Set-up: ......................................................................................................................... 8 6.1.2Power Measurements: ........................................................................................................8 6.2Modulation Characteristics; Paragraph 2.987: .................................................................... 8 Test setup for Frequency Response and Limiting:........................................................................... 9 6.2.2Frequency Response; Paragraph 2.987 (a) ........................................................................ 9 6.2.3Measured Frequency Response: ...................................................................................... 10 6.3Modulation Limiting Characteristics; Paragraph 2.987 (b) ................................................ 10 Modulation Limiting Test Setup ...................................................................................................... 11 6.3.2Measured Standard Band Limiting .................................................................................... 11 6.3.3Measured Narrow Band Limiting ....................................................................................... 12 6.4Occupied Bandwidth; Paragraph 2.989: ........................................................................... 12 6.4.1Occupied Bandwidth Test Procedure; Paragraph 2.989................................................... 12 6.4.2Occupied Bandwidth Test Setup: ...................................................................................... 13 6.4.3Measured Standard Band Occupied Bandwidth: .............................................................. 13 6.4.4Measured Narrow Band Occupied Bandwidth: ................................................................. 14 6.5Spurious Emissions; Paragraph 2.991, 2.993: .................................................................. 14 6.5.1Spurious Emissions at the Antenna Terminals; Paragraph 2.991: ................................... 14 6.5.2Spurious Emission Te…

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