Honeywell RTA-44DM2 Users Manual

Honeywell

MAINTENANCE MANUAL

RTA-44D VHF DATA RADIO SYSTEM

TO:	Holders of RTA-44D VHF Data Radio System Maintenance Manual, I.B. 1144-1.

REVISION NO. 5

to

MAINTENANCE MANUAL, I.B. 1144-1

Covering
Date of Original Publication	Sep/93
Date of Revision No. 1	Jul/95
Date of Revision No. 2	Nov/95
Date of Revision No. 3	Sep/97
Date of Revision No. 4	Feb 01/00
Date of Revision No. 5	Mar 01/02

INSTRUCTIONS:

1.This revision is a completely revised reissue of I.B. 1144-1, which contains the information printed in the original manual and all subsequent revisions. The manual was extensively revised to reflect the latest manufacturing configurations and up-to-date information.

2.Discard the original issue and all previous issues of this publication, and replace with Revision Number 5, dated Mar 01/02.

3.A bar in the left-hand column indicates where changes were made in this latest revision.

4.Revision stripes are applied where data has changed.

5.Discard this information page after completion.

I.B. 1144-1

23-20-02

Honeywell

System

Maintenance Manual

RTA-44D

VHF Data Radio System

Honeywell

CAGE Code 97896

I.B. 1144-1	T-1
23-20-02	Sep/93
	Rev 5: Mar 01/02

Honeywell

NOTE

IF ANY UNUSUAL OR SPECIAL SERVICE PROBLEMS ARISE, CONTACT HONEYWELL AIRLINES AND AVIONICS PRODUCTS CUSTOMER SUPPORT DEPARTMENT.

PROPRIETARY NOTICE

This document contains proprietary information and such information may not be disclosed to others for any purpose, nor used for manufacturing purposes without written permission from Honeywell International, Inc.

	23-20-02	PN-1
		No Date

Honeywell

MAINTENANCE MANUAL

RTA-44D VHF DATA RADIO SYSTEM

REVISION NO. 5

Mar 01/02

REVISION HIGHLIGHTS

Pages that have been revised are listed below, together with the highlights of the revision.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

PAGE NUMBER	DESCRIPTION OF CHANGE
T-1	Updated Title Page format to current standards.
RH-1/RH-2	Updated Revision Highlights pages for Revision No. 5.
LEP-1/LEP-2	Updated "List of Effective Pages" for this revision.
1	Added reference to Mode 2 functionality of VDR.
2	Added -2000 and -2051 units to RTA-44D VHF Data Radio System
	Components table, Figure 2.
3	Added reference to -2000 and -2051 units in Related Publications table,
	Figure 4.
4	Added reference to VDR Mode 2 functionality and made corrections to
	Configurations Available table, Figure 5.
5	Added Mode 2 VDR functionality to RTA-44D VHF Data Radio Features table,
	Figure 6.
6	Added VDR Mode 2 units to Leading Particulars listing, Figure 7.
7	Changed number of pages in Figure 7.
8	Changed number of pages in Figure 7.
8.1	Added 750 Digital Mode to Leading Particulars table, Figure 7.
8.2	Added ARINC 429 Input Labels table, Figure 7.1
8.3/8.4	Added ARINC 429 Output Labels table, Figure 7.2
9	Added -2000 and -2051 units to Environmental Certification table, Figure 8.
10	Restructured Paragraph 4 to preserve logical order.	Figure 11 moved to
	Figure 10.
11	Restructured Paragraph 4 to preserve logical order.	Figure 10 moved to
	Figure 10.1.
12	Restructured Paragraph 4 to preserve logical order.	Figure 13 moved to
	Figure 11. Added VDR Mode 2 to primary modes of operation listing.
13	Added Auxiliary Processor Module to System Component Description.
14	Added VDR Mode 2 Units (-2000 and -2051) Internal Architecture Diagram,
	Figure 13. (This replaced old Figure 13, which moved to become 11.)
16	Added reference to Production Test Mode (PTM) Tool Quantum Line Tester to
	I/O Section discussion. Added Basic Theory of Operation of Auxiliary
	Processor Module paragraph.
17/18	Adjusted formatting to accommodate added Theory of Operation of Auxiliary
	Processor Module paragraph.
I.B. 1144-1	23-20-02	RH-1
		Mar 01/02

	Honeywell
	MAINTENANCE MANUAL
	RTA-44D VHF DATA RADIO SYSTEM
101	Added VDR Mode 2 Units, (-2000 and -2051) "Normal Screen" diagram to
	Figure 101. Corrected screen nomenclature for consistency.
102	Updated LCD Control Flow by adding CMU PORT STATUS page to Figure
	101.1
103	Corrected screen nomenclature for consistency.
106	Corrected screen nomenclature for consistency.
107	Added explanation of numeric/alpha notation to display screens.
109	Moved text from page 110 to page 109 to accommodate Figures 114.1 and
	114.2.
110	Added new Failure pages from VDR Mode 2 units (-2000 and -2051), as
	Figures 114.1 and 114.2. Corrected screen nomenclature for consistency.
111	Added "Tuning Port Status Page" Screen for VDR Mode 2 units (-2000 and
	-2051) as Figure 116.1.
112	Added Valid Data Examples of "Tuning Port Status Page" Screen (-2000 and
	-2051) as Figure 116.2.
113	Added "Discrete Input Status Page 4" Screen for VDR Mode 2 units (-2000
	and -2051) as Figure 119.1.
114	Eliminated Figure 122.
115	Updated discussion of Previous Flight Legs Failure data. Corrected screen
	nomenclature for consistency.
116	Corrected "Previous Flight Legs Failures Data Page" Screen, Figure 125.
202	Added mention of maximum cable loss specification.
203	Added mention of ARINC specification for ground path resistance.
204	Updated Radio Connector Determinants Table, Figure 201, Sheet 3.
205	Updated Radio Connector Determinants Table, Figure 201, Sheet 4
206	Updated Radio Connector Determinants Table, Figure 201, Sheet 5
207	Updated Radio Connector Determinants Table, Figure 201, Sheet 6
209	Added Software On Board Loadable Instructions.
210	Added Software On Board Loadable Instructions.
211	Added Software On Board Loadable Instructions
212	Added Software On Board Loadable Instructions
213	Added Software On Board Loadable Instructions
214	Added "Normal Mode" Screen for VDR Mod 2 units (-2000 and -2051), Figure
	203.1.
215	Text moved from previous revision to accommodate new data on previous
	pages and correction to "Test Complete, Failures" Screen, Figure 206 .
216	Text moved from previous revision to accommodate new data on previous
	pages .
217/218	Text moved from previous revision to accommodate new data on previous
	pages and Figure 207 updated.
219/220	Text moved from previous revision to accommodate new data on previous
	pages and Figure 208 updated.
I.B. 1144-1	23-20-02	RH-2
		Mar 01/02

Honeywell

MAINTENANCE MANUAL

RTA-44D VHF DATA RADIO SYSTEM

RECORD OF REVISIONS

REV.	REVISION	DATE	BY		REV.	REVISION	DATE	BY
NO.	DATE	INSERTED			NO.	DATE	INSERTED

Complete through

Revision No. 5

I.B. 1144-1 RR-1

23-20-02	No Date

Honeywell

MAINTENANCE MANUAL

RTA-44D VHF DATA RADIO SYSTEM

RECORD OF REVISIONS

	REV.	REVISION	DATE	BY		REV.	REVISION	DATE	BY
	NO.	DATE	INSERTED			NO.	DATE	INSERTED

I.B. 1144-1 RR-2

23-20-02	No Date

Honeywell

MAINTENANCE MANUAL

RTA-44D VHF DATA RADIO SYSTEM

RECORD OF TEMPORARY REVISIONS

T.R.		DATE	BY	DATE	BY
NO.	DATE	INSERTED		REMOVED

Complete Through

Temporary Revision 23-5

I.B. 1144-1 RTR-1

23-20-02	Mar 01/02

Honeywell

MAINTENANCE MANUAL

RTA-44D VHF DATA RADIO SYSTEM

RECORD OF TEMPORARY REVISIONS

	T.R.		DATE		DATE
	NO.	DATE	INSERTED	BY	REMOVED	BY

I.B. 1144-1 RTR-2

23-20-02	Mar 01/02

Honeywell

MAINTENANCE MANUAL

RTA-44D VHF DATA RADIO SYSTEM

		LIST OF EFFECTIVE PAGES
SUBJECT	PAGE	DATE	SUBJECT
Title Page	*T-1	Mar 01/02
Proprietary	PN-1	No Date
Notice
Revision	*RH-1	Mar 01/02
Highlights	*RH-2	Mar 01/02
Record of	RR-1	No Date
Revisions	RR-2	No Date
Record of	RTR-1	Mar 01/02
Temporary	RTR-2	Mar 01/02
Revisions
List of	*LEP-1	Mar 01/02	Maintenance
Effective	LEP-2	Blank	Practices
Pages
Table of	TC-1	Mar 01/02
Contents	TC-2	Blank
Introduction	INTRO-1	Mar 01/02
Description	0	Mar 01/02
and Operation	1	Mar 01/02
	*2	Mar 01/02
	*3	Mar 01/02
	*4	Mar 01/02
	*5	Mar 01/02
	*6	Mar 01/02
	*7	Mar 01/02
	*8	Mar 01/02
	*8.1	Mar 01/02
	*8.2	Mar 01/02
	*8.3	Mar 01/02
	*8.4	Blank
	*9	Mar 01/02
	*10	Mar 01/02
	*11	Mar 01/02
	*12	Mar 01/02
	*13	Mar 01/02
	*14	Mar 01/02
	15	Mar 01/02
	*16	Mar 01/02
	*17	Mar 01/02
	18	Blank
Fault Isolation	*101	Mar 01/02
	*102	Mar 01/02
	*103	Mar 01/02
	104	Mar 01/02
I.B. 1144-1		23-20-02

PAGE	DATE
105	Mar 01/02
*106	Mar 01/02
*107	Mar 01/02
108	Mar 01/02
*109	Mar 01/02
*110	Mar 01/02
*111	Mar 01/02
*112	Mar 01/02
*113	Mar 01/02
*114	Mar 01/02
*115	Mar 01/02
*116	Mar 01/02
201	Mar 01/02
*202	Mar 01/02
*203	Mar 01/02
*204	Mar 01/02
*205	Mar 01/02
*206	Mar 01/02
*207	Mar 01/02
208	Mar 01/02
*209	Mar 01/02
*210	Mar 01/02
*211	Mar 01/02
*212	Mar 01/02
*213	Mar 01/02
*214	Mar 01/02
*215	Mar 01/02
*216	Mar 01/02
F*217	Mar 01/02
F 218	Blank
F*219	Mar 01/02
F*220	Blank

LEP-1/LEP-2

Mar 01/02

Honeywell

MAINTENANCE MANUAL

RTA-44D VHF DATA RADIO SYSTEM

				TABLE OF CONTENTS
Paragraph/Title																																Page
DESCRIPTION AND OPERATION	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	1
FAULT ISOLATION	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	- 101
MAINTENANCE PRACTICES	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	201

I.B. 1144-1 TC-1/TC-2

23-20-02	Mar 01/02

Honeywell

MAINTENANCE MANUAL

RTA-44D VHF DATA RADIO SYSTEM

INTRODUCTION

This manual, I.B. 1144-1 (23-20-02), contains information covering description and operation, installation, and flight-line checkout procedures for the Honeywell International, Airlines and Avionics Products RTA-44D VHF Data Radio System

I.B. 1144-1 INTRO-1

23-20-02	Mar 01/02

Honeywell

MAINTENANCE MANUAL

RTA-44D VHF DATA RADIO SYSTEM

RTA-44D VHF Data Radio

Figure 1

I.B. 1144-1	Page 0
	Mar 01/02

Honeywell

MAINTENANCE MANUAL

RTA-44D VHF DATA RADIO SYSTEM

DESCRIPTION AND OPERATION

1.General

This section contains descriptive information covering the RTA-44D VHF Data Radio (VDR) System and lists other components required for system operation. The RTA-44D VHF Data Radio (VDR) is illustrated in Figure 1.

A.Purpose of Equipment

The RTA-44D VHF Radio (VDR) System is an airborne VHF Communications Transceiver designed to provide voice and data communication between on-board aircraft systems, to other aircraft systems, and to ground-based systems.

The VDR is designed to Aeronautical Radio Incorporated (ARINC) 716 Airborne VHF Communications Transceiver and ARINC 750 Airborne VHF Data Radio Specifications, Radio Technical Commission for Aeronautics (RTCA) documents number DO-186a Minimum Operational Performance Standards (MOPS) for Airborne Radio Communications Equipment Operating within the Radio Frequency Range 117.975 - 137.000 Megahertz and number DO-207 MOPS for Devices that Prevent Blocked Channels Used in Two-Way Radio Communications Due to Unintentional Transmissions, and European Organization for Civil Aviation Equipment (EUROCAE) ED-23B Minimum Performance Specification for Airborne VHF Communications Equipment Operating in the Frequency Range 117.975 - 137.000 MHz.

The VDR is fully interchangeable with the earlier ARINC 716 RTA-44A VHF Communications Transceiver for backward compatibility.

In an Aircraft Communications Addressing and Reporting System (ACARS), the VDR is a simple transceiver with an analog interface to the ACARS Management Unit (MU) or a MSK modem.

In Mode 2, the VDR contains a D8PSK modem and a digital high speed ARINC 429 link to the MU/CMU/ATSU per Mode 2 functionality in ARINC 750-3.

The VDR system requires an antenna for its RF inputs and outputs, a control head or radio management panel, an audio input source and output sink for its analog voice functions, and an ACARS MU, CMU or ATSU for its digital control and data functions. The VDR system may also be connected to a Central Maintenance Computer (CMC) or Central Fault Display System (CFDS) to transfer maintenance data.

Depending upon the selected mode, the VDR operates with the following equipment:

•an ARINC 597, 724, or 724B ACARS MU,

•an ARINC 604 and Airbus Industrie ABD-0048C Centralized Fault Display Interface Unit (CFDIU),

•an ARINC 716 voice audio input source and output sink,

•an ARINC 716 voice frequency control source,

•an ARINC 758 CMU or ATSU.

•an antenna.

B.Equipment Part Numbers

Components of the RTA-44D VHF Data Radio System supplied by Honeywell are listed in Figure 2. The figure lists the currently available components of the system, along with part numbers and equipment type numbers.

I.B. 1144-1	23-20-02	Page 1
		Mar 01/02

Honeywell

MAINTENANCE MANUAL

RTA-44D VHF DATA RADIO SYSTEM

		EQUIPMENT		Honeywell
		TYPE NUMBER	EQUIPMENT DESCRIPTION	PART NUMBER
		RTA-44D	Airborne VHF Data Radio (VDR) capable of VHF	064-50000-0101
		VHF Data Radio	COM (ARINC 716, EUROCAE ED-23B) voice and
			analog data processing through digital signal pro-
			cessing (DSP) over a frequency range of 118.000
			to 136.975 MHz with 25-kHz channel spacing. The
			VDR contains 8.33-kHz channel spacing capability
			per ARINC 716, Supplement 8. VDR is also capa-
			ble of RTCA DO-207 "stuck mike" detection with-
			out warning tone. Complies with DO-178B.
			Capable of interfacing CMC per ARINC 604.
			Capable of data recording and loading from the
			front of the unit, and software loading from the rear
			connector through an ARINC 615 data loader.
			The VDR contains an RS-232 port on the front
			panel for ease of maintenance. Meets DO-160C
			lightning protection and 200-ms power interrupt
			transparency requirements. Meets HIRF require-
			ments and ICAO Annex 10 requirements (RTCA
			DO-186a).
			Same as -0101, except added new software to	064-50000-0110
			adjust squelch when 8.33-kHz channel spacing is
			selected.
			Same as -0101, except "stuck mike" detection	064-50000-0202
			emits a 1-khz interrupted warning sidetone during
			last five seconds of 35-second transmission.
			Capable of interfacing CFDS per ARINC 604 and
			Airbus Industrie ABD-0048C.
			Same as -0202, except capable of interfacing	064-50000-0303
			CFDS in accordance to McDonnell Douglas soft-
			ware requirements (replaces ABD-0048C imple-
			mentation).
			Same as -0202, except it adds Mode A functional-	064-50000-0505
			ity per ARINC 750-3.
			Same as -0110, except it adds Mode A and Mode 2	064-50000-2000
			functionality specified in ARINC 750-3 and meets
			DO-160D requirements.
			Same as -0505, except it adds Mode 2 functionality	064-50000-2051
			specified in ARINC 750-3 and meets DO-160D
			requirements.

RTA-44D VHF Data Radio System Components

(Honeywell Supplied)

Figure 2

I.B. 1144-1	23-20-02	Page 2
		Mar 01/02

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MAINTENANCE MANUAL

RTA-44D VHF DATA RADIO SYSTEM

C.Equipment Required but Not Supplied

Figure 3 lists equipment required for the RTA-44D VHF Data Radio System, but not supplied by Honeywell.

		EQUIPMENT	DESCRIPTION
		Power Source	DC power supply of 27.5 volts.
			Receive - 1 ampere, Transmit - 7 amperes (at stated input voltage.)
		Audio Distribution System	Audio system with an input impedance of 200 to 10,000 ohms.
		Control Panel	Provides remote control of frequency selection for 25-kHz or 8.33-kHz
			channel spacing system operation (serial digital, ARINC 429-7 and
			ARINC 716, Supplement 8), power on/off, volume, and squelch in con-
			formance to ARINC 716.
		MU/CMU/ATSU	Provides control and data source/sink when operating in the 750 data
			mode.
		3 MCU Unit Mount	Provides a means of mounting RTA-44D VHF Data Radio in the aircraft.
		VHF Antenna	Capable of receiving and transmitting VHF signals over a frequency range
			of 118.000 through 136.975 MHz.
		Microphone	150-ohm impedance microphone (either carbon or transistor) operating
			from approximately 16-volt power supply.
		Cables and Connectors	Necessary connectors and cables as shown in RTA-44D VHF Data Radio
			System Interwiring Diagram, Figure 208.
			Equipment Required but Not Supplied
			Figure 3

D.Related Publications

Figure 4 lists the publications covering the RTA-44D VHF Data Radio and test procedure supporting the system.

				HoneywelI	ATA
				IDENTIFICATION	IDENTIFICATION
		PUBLICATION		NUMBER	NUMBER
		RTA-44D VHF Data Radio		I.B. 1144A-2	23-20-36
		Part Numbers 064-50000-0101, -0110 and -2000
		Component Maintenance Manual
		RTA-44D VHF Data Radio		I.B. 1144A-3	23-20-38
		Part Numbers 064-50000-0202, -0303, -0505 and -2051
		Component Maintenance Manual
		Related Publications
		Figure 4

I.B. 1144-1	23-20-02	Page 3
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MAINTENANCE MANUAL

RTA-44D VHF DATA RADIO SYSTEM

2.Configurations Available

Figure 5 lists the available configurations of the RTA-44D VHF Data Radio and the features contained in each configuration. Figure 6 contains a brief description of each feature.

						FEATURES
						COMPATIBILITY			Mode	Mode
						INTERFACE		8.33-kHz	A	2
								CHANNEL
	Honeywell							SPACING
	PART			STUCK
	NUMBER	BASIC	FAULT	MIKE		BOEING
	064-50000	UNIT	MEMORY	ALARM	ACARS	CMC	CFDS
	-0101	X	X		X	X		X
	-0110	X	X		X	X		X
	-0202	X	X	X	X		X1	X3
	-0303	X	X	X	X		X2	X
	-0505	X	X	X	X		X1	X	X
	-2000	X	X	X	X	X4	X4	X	X	X
	-2051	X	X	X	X		X1	X	X	X

1 = Airbus CFDS interface software.

2 = McDonnell Douglas CFDS interface software.

3 = All -0202 hardware capable. 02/02 software required for squelch adjustment for 8.3-kHz channel spacing. 4 =On Board Loadable Dependent.

RTA-44D VHF Data Radio, Configurations Available

Figure 5

		FEATURE	DESCRIPTION
		Basic Unit	Airborne solid-state VDR is capable of receiving and transmitting ARINC
			716 voice and ARINC 716 data over a frequency range of 118.000 to
			136.975 MHz with 25-kHz channel spacing. Channel spacing capability
			of 8.33-kHz per ARINC 716, Supplement 10 is available as well as RTCA
			DO-207 "stuck mike" detection. Complies with DO-178B software
			requirements and enhanced BITE requirements of Airbus, Boeing, and
			McDonnell Douglas.
			RTA-44D VHF Data Radio Features
			Figure 6
			Sheet 1 of 2
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			Honeywell
			MAINTENANCE MANUAL
			RTA-44D VHF DATA RADIO SYSTEM
		FEATURE	DESCRIPTION
		Basic Unit (Continued)	Capable of data recording and loading from the front of the VDR, and
			software loading from the rear connector through an ARINC 615 data
			loader. Contains an RS-232 port on the front panel for ease of
			maintenance. Meets RTCA DO-160C lightning protection and 200 ms
			power interrupt transparency requirements. Meets HIRF requirements
			and ICAO Annex 10 requirements (RTCA DO-186a). Front panel LCD
			displays unit's characteristics (part number, serial number), BITE
			status with fault location help pages, line maintenance values with help
			pages, and software data loading help screens.
		Fault Memory	A nonvolatile, single-chip fault memory that allows the recording of
			faults associated with a particular flight leg. Sixty-four flight legs are
			available with each flight leg made up of a flight-leg information header
			containing a fault record section for recording ten airborne faults and
			three ground faults. When all flight legs have been used, the oldest
			flight leg shall be reused.
		Stuck Microphone Alarm	After the VDR detects that the microphone is in the transmit (keyed)
			position for a time duration longer than 30 seconds, a 1 kHz
			interrupted tone (½ second on, ½ second off) is emitted for five
			seconds via the audio/sidetone output. After a total of 35 seconds, the
			VDR turns off the transmitter and the 1 kHz interrupted sidetone. To
			reactivate the transmitter, the microphone push-to-talk button must be
			released and then rekeyed.
		ACARS Compatible	The VDR ensures proper processing of the ACARS messages.
		CMC Interface	The VDR interfaces fault memory and BITE data between the VDR
			and line maintenance Centralized Maintenance Computer (CMC) for
			the purpose of extracting maintenance information and initiating tests.
			Designed to conform with ARINC 429 interfaces and ARINC 604
		CFDS Interface	requirements.
			The VDR interfaces fault memory and BITE data between the VDR
			and line maintenance Centralized Fault Display Interface Unit (CFDIU)
			for the purpose of extracting maintenance information and initiating
			tests. Designed to conform with ARINC 429 interfaces, ARINC 604
			and Airbus Industrie ABD-0048C or McDonnell Douglas software
			requirements.
		8.33-kHz Channel	The VDR is capable of 8.33-kHz channel spacing to meet the
		Spacing Capability	European narrow-band (8.33-kHz) VHF voice communications
			systems. The narrow-band mode of operation is limited to voice
			communications.
		Mode A	The Mode A VDR contains an ACARS MSK modem and a digital high
			speed ARINC 429 link to the MU/CMU/ATSU per the Mode A
			functionality specified in ARINC 750-3.
		Mode 2	The Mode 2 VDR contains a D8PSK modem and a digital high speed
			ARINC 429 link to the MU/CMU/ATSU per Mode 2 functionality in
			ARINC 750-3. The Mode 2 VDR meets DO-160D requirements.
			RTA-44D VHF Data Radio Features
			Figure 6 (Sheet 2 of 2)
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MAINTENANCE MANUAL

RTA-44D VHF DATA RADIO SYSTEM

3.System Leading Particulars

A.Unit Specifications

Figure 7 lists the leading particulars for the RTA-44D VHF Data Radio System.

	CHARACTERISTICS	DESCRIPTION
	General - Overall VDR
	Form Factor	3 MCU (ARINC 600)
	Dimensions	Refer to outline drawing, Figure 207.
	Weight	9.6 LBS., (4,4Kg) Maximum
	General - Overall VDR
	Power Requirements	27.5 Vdc nominal (+10%, -20%)
		1.0A - Receive (-0101, -0110, -0202, -0303 and -0505)
		1.5A - Receive (-2000 and -2051)
		7.0A - Transmit (All Units)
	Temperature
	Operating	-55°C to +70°C (-67°F to +158°F) (-0101, -0110, -0202, -0303 and -0505)
	Storage	-15°C to +70°C (5°F to 158°F)	(-2000 and -2051)
		-65°C to +85°C (-85°F to +185°F) (All Units)
	Cooling	ARINC 600
	Humidity	Zero to 95%
	Altitude	To 15,240 meters (50,000 feet)
	Warm-up period	None; stable operation after power application.
	Frequency Control	ARINC, 429 Mark, 33 (Serial Digital)
	Frequency Range	118.000 MHz to 136.975 MHz
	Channel Spacing	25-kHz and 8.33-kHz
	Frequency Stability	±0.0005%
	Duty Cycle	Continuous operation from -55°C to +70°C with ARINC 600 cooling.
	Certification	TSO C37d Class 3 and 5 and C38d Class C and E;
	-0101, -0110, -0202, -0303 and
	-0505 Units	DO-160C Categories
		/A2D2/ZCA/MNB/XXXXXXAAAZZUZ/XXE2/XX
		DO-186a, DO-178B, DO-207 AND EUROCAE ED-23B
	-2000, -2051 Units	TSO C37d Class 3 and 5 and C38d Class C and E;
		DO-160D Categories
		[(A2)(D2)Z]BAB[RB1]XXXXXXZAAZCRRL[A2C2]XXA
		DO-186a, DO-178B, DO-207 AND EUROCAE ED-23B
	General - Analog Voice/Data	Less than 50 milliseconds to stabilize on a new channel frequency.
	Channel Changing Time
	Transmit to Receive Recovery	Less than 50 milliseconds after transmission to provide 90% of its output
		at an input level of 10 µV modulated 30% at 1000 Hz.
		Leading Particulars
		Figure 7 (Sheet 1 of 4)
	I.B. 1144-1	23-20-02	Page 6
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MAINTENANCE MANUAL

RTA-44D VHF DATA RADIO SYSTEM

	CHARACTERISTICS	DESCRIPTION
	Analog Voice Receiver	Greater than 6 dB SINAD for -107 dBm signal modulated
	Sensitivity
		30% at 1000 Hz.
	Selectivity
	25-kHz Channel Spacing	±8-kHz at 6 dB bandwidth, ±17-kHz at 60 dB bandwidth.
	8.33-kHz Channel Spacing	±2.78-kHz at 6 dB bandwidth, ±7.365-kHz at 60 dB
		bandwidth.
	Cross Modulation	Meets requirements of ARINC 716, Section 3.6.4.
	AGC	Within 3 dB with inputs from 5 µV to 100,000 µV and not
		more than 6 dB with inputs from 5 µV to 500,000 µV.
	Audio Output	40 milliwatts maximum into a 600 ±20% ohm resistive
		load, factory set at 10 mW at 1000 Hz.
	Audio Output Frequency Response	Within 6 dB from 300 to 2500 Hz.
	Audio Output Harmonic Distortion	Total harmonic distortion will not exceed 5% with
		1000 µV input signal modulated 30% at 1000 Hz.
	Audio Output Regulation	No more than 2 dB voltage change from a 10 mW
		reference level into 600 ohms for resistive load
		variations between 450 ohms to 2400 ohms, and no
		more than 6 dB voltage change for resistive load
		variations between 200 ohms and 20k ohms.
	Voice Phase Shift Limit	Audio output does not depart from that of the
		positive-going modulation envelope at the receiver input
		by more than -30° to +120° with a 1000 µV input signal
		modulated 30% at 1000 Hz and an output level adjusted
		for 40 milliwatts into a 600-ohm resistive load.
	Undesired Responses	80 dB
	Input Impedance	50 ohms, nominal
	Analog Voice Transmitter
	Output Power	25 watts (nominal)
	Harmonic and Spurious Emission	Any harmonics of the desired frequency is attenuated at
		least 60 dB below the desired carrier level and any other
		emission will be attenuated at least 118 dB below the
		carrier level.
		Leading Particulars
		Figure 7 (Sheet 2 of 4)

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		Mar 01/02

Honeywell

MAINTENANCE MANUAL

RTA-44D VHF DATA RADIO SYSTEM

		CHARACTERISTICS	DESCRIPTION
		Analog Voice Transmitter (Con’t)
		Transmitter Modulation Frequency	Flat within 6 dB from 300 Hz to 2500 Hz.
		Response
		Audio Distortion	6% maximum for 30% modulation and 10% maximum
			for 90% modulation with a 0.5 volt input and a
			modulating frequency from 300 Hz to 2500 Hz.
		Modulation Level	90% modulation minimum for an input level of 0.25 volts
			rms at 1000 Hz.
		Analog Data Receiver
		Gain SELCAL/Output	0.6 volts rms minimum with a 2 µV signal modulated
			30% at 1000 Hz into a 600-ohm load.
		Frequency Response SELCAL	±2.5 dB from 312 Hz to 1200 Hz (post detection
		Output	response with respect to 1000 Hz is ±4.5 dB from
			300 Hz to 6600 Hz).
		Distortion SELCAL Output	4.5% maximum with an input signal of 1000 µV
			modulated 30% at 1000 Hz and a level adjusted to
			provide 0.5 volts into a 600-ohm load.
		AGC Attack Time SELCAL Output	Reaches 90% of its steady-state value within
			30 milliseconds maximum after the step application of an
			RF carrier of 1000 µV modulated 30% at 1000 Hz.
		AGC Decay Time SELCAL Output	Reaches 90% of its steady-state value within
			45 milliseconds maximum after the receiver input of
			1000 µV modulated 30% at 1000 Hz is step reduced to
			10 µV.
		Analog Data Transmitter
		Modulation Level Data Input	70% modulation minimum for a frequency of 1000 Hz at
			a -10 dBm level.
		Frequency Response Data Input	Flat within 5.5 dB from 600 Hz to 6600 Hz.
		Distortion Data Input	9.5% maximum distortion at modulation level up to 90%
			over frequency range of 600 Hz to 6600 Hz.
			Leading Particulars
			Figure 7 (Sheet 3 of 4)

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