Garmin SL30 NAV, SL30 COMM User Manual



Apollo

Model SL30 NAV/COMM

Installation Manual

August 2003
560-0404-03a

 2003 Garmin AT, Inc. All rights reserved.
Printed in the USA

No part of this document may be transmitted, reproduced, or copied in any form or by any means
without the prior written consent of Garmin AT, Inc. Due to Garmin AT’s commitment to
constantly improve the quality and performance of our products, information contained in this
document is subject to change without notice.

Garmin AT, Inc. and Apollo are registered trademarks of Garmin AT, Inc.

Garmin AT, Inc. 2345 Turner Rd. SE
PO Box 13549 Salem, OR 97302
Salem, OR 97309 USA

Phone [phone]

800.525.6726
In Canada 800.654.3415
Fax: [phone]

HISTORY OF REVISIONS

Revision Date Description

-- 11/16/99 Initial release (EN6278).
01 2/10/00 Added interface wiring diagrams, refined post installation

checkout procedures.

02 8/2/01 New mounting tubes, dual SL30’s, DST info to Apollo GX (EN

6949). SW Version 1.2
03 2/21/02 Added helicopter environmental qualification information.
03a 8/26/03 Changed logo and added JTSO information.

IMPORTANT NOTE

“The conditions and tests required for TSO approval of this article are minimum performance
standards. It is the responsibility of those desiring to install this article on or within a specific
type or class of aircraft to determine that the aircraft operating conditions are within TSO
standards. The article may be installed only if further evaluation by the applicant documents
an acceptable installation and is approved by the Administrator.” Follow installation
recommendations as noted in AC20-67B, Airborne VHF Communications Equipment

Installations.

Source: FAA TSO-C34e, TSO-C36e, TSO-C37d, TSO-C38d, TSO-

C40c, TSO-C66c, and TSO-C128.

ORDERING INFORMATION

To receive additional copies of this publication, order part # 560-0404-03a, Apollo SL30
NAV/ COMM Installation Manual.

REFERENCE PUBLICATIONS

Following are other publications referenced in this guide.

Apollo SL30 NAV/ COMM Operation Manual, order part # 560-0403-xx.

NOTES

Table of Contents

TABLE OF CONTENTS

SECTION 1 - INTRODUCTION ................................................................................................ 1

BOUT THIS MANUAL ..................................................................................................................... 1

A
A

POLLO SL30 DESCRIPTION ............................................................................................................ 1

FEATURES ........................................................................................................................................ 2

GENERAL FEATURES ..................................................................................................................................................2

NAVIGATION RADIO FEATURES .................................................................................................................................2

COMM RADIO FEATURES ...........................................................................................................................................3

PHYSICAL SPECIFICATIONS ........................................................................................................................................3

NAV RADIO PERFORMANCE SPECIFICATIONS ...........................................................................................................3

COMM RADIO PERFORMANCE SPECIFICATIONS..........................................................................................................3

SYSTEM INTERFACES........................................................................................................................ 4

NAVIGATION RECEIVER .............................................................................................................................................4

COMM TRANSCEIVER.................................................................................................................................................4

SERIAL INTERFACE ....................................................................................................................................................4

REGULATORY COMPLIANCE............................................................................................................. 4

UNPACKING THE EQUIPMENT ........................................................................................................... 5

PACKAGE CONTENTS ....................................................................................................................... 5

OTHER REQUIRED MATERIALS......................................................................................................... 6

SPECIAL TOOLS REQUIRED............................................................................................................... 6

LICENSE REQUIREMENTS ................................................................................................................. 7

SECTION 2 - INSTALLATION.................................................................................................. 9

PRE-INSTALLATION INFORMATION................................................................................................... 9

INSTALLATION OVERVIEW ............................................................................................................... 9

INSTALLATION CONSIDERATIONS..................................................................................................... 9

MOUNTING CONSIDERATIONS....................................................................................................................................9

MINIMUM SYSTEM CONFIGURATION..........................................................................................................................9

EQUIPMENT MOUNTING ................................................................................................................. 10

MOUNTING TUBE INSTALLATION .............................................................................................................................10

UNIT INSERTION.......................................................................................................................................................12

UNIT REMOVAL .......................................................................................................................................................12

LECTRICAL CONNECTIONS ........................................................................................................... 14

E

POWER .....................................................................................................................................................................14

AVIONICS OUTPUTS .................................................................................................................................................14

SERIAL INTERFACE ..................................................................................................................................................14

SPEAKER AND HEADPHONE OUTPUTS ......................................................................................................................14

MICROPHONE INPUTS...............................................................................................................................................15

TRANSMIT KEY INPUT..............................................................................................................................................15

INTERCOM SELECTOR SWITCH .................................................................................................................................15

REMOTE FLIP/FLOP INPUT........................................................................................................................................15

ANTENNA INSTALLATION AND CONNECTIONS ............................................................................... 15

COMM AND NAV ANTENNAS....................................................................................................................................15

USE OF SPLITTER AND COMBINER............................................................................................................................16

EQUIPMENT INTERFACE ................................................................................................................. 17

L

IMITATIONS ON USING A COMPOSITE SIGNAL .............................................................................. 33

LIMITATIONS ON DISTANCE, SPEED, AND TIME INFORMATION....................................................... 33

OST INSTALLATION CHECKOUT.................................................................................................... 33

P

MOUNTING / WIRING CHECK ...................................................................................................................................33

Apollo SL30 Installation Manual

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Table of Contents

SETUP AND CHECKOUT............................................................................................................................................ 33

FINAL SYSTEM CHECK ............................................................................................................................................ 37

INSTRUCTIONS FOR CONTINUED AIRWORTHINESS ..........................................................................40

SECTION 3 - SPECIFICATIONS .............................................................................................41

ELECTRICAL ...................................................................................................................................41

PHYSICAL .......................................................................................................................................41

ENVIRONMENTAL ...........................................................................................................................41

AVIONICS OUTPUTS ........................................................................................................................42

NAV RECEIVER PERFORMANCE .....................................................................................................43

VOR ....................................................................................................................................................................... 43

LOCALIZER.............................................................................................................................................................. 43

GLIDESLOPE ............................................................................................................................................................44

OBS RESOLVER ...................................................................................................................................................... 44

COMPOSITE OUTPUT................................................................................................................................................ 44

COMM RECEIVER PERFORMANCE ...................................................................................................45

COMM TRANSMITTER PERFORMANCE.............................................................................................45

INTERCOM PERFORMANCE ..............................................................................................................46

CONTROL INPUTS............................................................................................................................46

ANTENNA REQUIREMENTS..............................................................................................................46

COMM ANTENNA..................................................................................................................................................... 46

NAV ANTENNA....................................................................................................................................................... 46

SERIAL INTERFACE .........................................................................................................................47

REAR CONNECTOR PINOUT.............................................................................................................47

SECTION 4 - LIMITATIONS ...................................................................................................49

INSTALLATION ................................................................................................................................49

COMPUTATION RATES ....................................................................................................................49

OPERATIONAL.................................................................................................................................49

APPENDIX A - TROUBLESHOOTING ..................................................................................51

CONTACTING THE FACTORY FOR ASSISTANCE................................................................................52

APPENDIX B - PERIODIC MAINTENANCE ........................................................................53

VOR CHECKS .................................................................................................................................53

QUIPMENT CALIBRATION..............................................................................................................53

E

REFERENCE OSCILLATOR (COMM ONLY) ................................................................................................................ 53

CLEANING THE FRONT PANEL.........................................................................................................53

APPENDIX C - ENVIRONMENTAL QUALIFICATIONS...................................................55

APPENDIX D - ACCESSORIES ...............................................................................................57

ROM GARMIN AT, INC. .................................................................................................................57

F

APPENDIX E - SERIAL INTERFACE SPECIFICATIONS .................................................59

I

NPUT COMMANDS..........................................................................................................................59

OUTPUT MESSAGES ........................................................................................................................59

ATA FORMAT................................................................................................................................60

D
D

EFAULT MESSAGE OUTPUT ..........................................................................................................60

MESSAGE FORMATS........................................................................................................................60

ii Apollo SL30 Installation Manual

Table of Contents

MESSAGE DEFINITIONS .................................................................................................................. 61

INPUT MESSAGES.....................................................................................................................................................61

REMOTE VOR LIST..................................................................................................................................................62

REMOTE LOCALIZER LIST ........................................................................................................................................64

REQUEST DATA OUTPUT..........................................................................................................................................66

SET ACTIVE VOR/LOC FREQUENCY AND RECEIVER FUNCTION .............................................................................67

SET STANDBY VOR/LOC FREQUENCY AND RECEIVER FUNCTION ..........................................................................67

SET STANDBY COMM FREQUENCY AND TRANSCEIVER FUNCTION.........................................................................68

SET ACTIVE COMM FREQUENCY AND TRANSCEIVER FUNCTION............................................................................68

SET NAV AUDIO MODE...........................................................................................................................................69

SET OMNI-BEARING SELECT (OBS) VALUE.............................................................................................................69

DME SENSOR INPUT................................................................................................................................................70

OUTPUT MESSAGES........................................................................................................................ 70

RESET STATUS .........................................................................................................................................................70

CDI, GSI, AND RELATED FLAGS..............................................................................................................................71

DECODED OBS SETTING ..........................................................................................................................................72

RADIAL FROM ACTIVE VOR....................................................................................................................................72

RADIAL FROM STANDBY VOR ................................................................................................................................72

DECODED STATION IDENTIFIER................................................................................................................................73

COMMUNICATIONS ERROR.......................................................................................................................................73

NAV RECEIVER STATUS..........................................................................................................................................74

NAV AUDIO MODE .................................................................................................................................................74

NAV MICROCONTROLLER SOFTWARE VERSION......................................................................................................75

NAV DSP SOFTWARE VERSION ..............................................................................................................................75

ADC DATA OUTPUT ................................................................................................................................................75

COMM TRANSCEIVER STATUS..................................................................................................................................76

COMM SOFTWARE VERSION.....................................................................................................................................76

Apollo SL30 Installation Manual

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Table of Contents

LIST OF TABLES

TABLE 1 - PACKAGE CONTENTS........................................................................................................5

TABLE 2 - COMM INTERFACE CONNECTOR PINOUT ........................................................................47

ABLE 3 - REAR PANEL CONNECTOR PINOUT .................................................................................48

T
T

ABLE 4 - TROUBLESHOOTING GUIDE ............................................................................................51

TABLE 5 - DATA OUTPUT REQUESTS ..............................................................................................66

LIST OF ILLUSTRATIONS

FIGURE 1 - SL30 FRONT PANEL ........................................................................................................2

IGURE 2 - FULL STACK MOUNTING TUBE SPACING.......................................................................11

F

FIGURE 3 - CAM LOCK POSITIONING...............................................................................................12

F

IGURE 4 - MOUNTING FRAME ASSEMBLY .....................................................................................13

IGURE 5 - CABLE ROUTING ...........................................................................................................13

F
F

IGURE 6 - REAR COAX CONNECTOR ASSEMBLY ...........................................................................16

FIGURE 7 - SL30 COMM WIRING DIAGRAM ....................................................................................18

FIGURE 8 - SL30 COMM TYPICAL AUDIO PANEL CONNECTIONS ....................................................19

FIGURE 9 - SL30 NAV POWER AND AUDIO CONNECTIONS ............................................................20

FIGURE 10 – SL30 TO APOLLO GX50/60 CONNECTIONS ................................................................20

FIGURE 11 - SL30 - GX50/60 - MX20 CONNECTIONS ....................................................................21

FIGURE 12 - SL30 NAV TO MID-CONT MD200-306/307...............................................................22

FIGURE 13 - SL30 NAV TO MID-CONT MD200-302/303 CONNECTIONS .......................................23

FIGURE 14 - SL30 NAV AND ACU TO MID-CONT MD200-306/307..............................................24

FIGURE 15 - SL30 NAV TO STEC IND-351A CONNECTIONS ........................................................25

FIGURE 16 - SL30 NAV TO BENDIX/KING KN72/203/204/208/208A/209/209A WIRING .............26

FIGURE 17 - SL30 NAV TO BENDIX/KING KI202/206/525A/KPI552 WIRING...............................27

FIGURE 18 - SL30 NAV TO SANDEL DISCRETE CONNECTIONS.......................................................28

FIGURE 19 - SL30 NAV TO SANDEL SN3308 CONVERTER CONNECTIONS .....................................29

FIGURE 20 - SL30 TO SPERRY RD 550A AND RD650 WIRING .......................................................30

IGURE 21 - SL30 TO COLLINS 331A-6P, 331A-9G, AND PN-101 WIRING ....................................31

F
F

IGURE 22 - SL30 TO CENTURY NSD 360A AND NSD 1000 WIRING.............................................32

FIGURE 23 - UNIT DIMENSIONS.......................................................................................................42

iv Apollo SL30 Installation Manual

Introduction

SECTION 1 - INTRODUCTION

ABOUT THIS MANUAL

This manual describes the installation of the Apollo SL30 Nav/Comm units. It is intended for
use by persons certified by the Federal Aviation Administration (FAA) to install aircraft
navigation devices. It includes installation and checkout procedures for the SL30 unit to
standards described in FAA advisory circulars AC 20-67B (for Comm).

Section 1

Section 2

Section 3

Section 4

Appendix A

Appendix B

Appendix C

Appendix D

Appendix E

Provides an introduction to the Apollo SL30 unit. TSO certification information
is also included in this section.

Includes installation and checkout procedures.

Includes complete specifications.

Includes limitations for the equipment and installation.

Includes troubleshooting information.

Includes periodic maintenance requirements.

Includes the environmental qualification form.

Includes information on accessories.

Includes serial data specifications.

APOLLO SL30 DESCRIPTION

The Apollo SL30 includes a 760-channel VHF Comm transceiver and 200-channel
VOR/LOC/GS navigation receiver with DME display.

The Apollo SL30 is a member of the Apollo slimline series which includes the SL10/15
Audio Selector Panels, SL40 Comm, SL50 GPS, SL60 GPS/Comm, and SL70 Transponder.

Apollo SL30 Installation Manual

1

Introduction

Figure 1 - SL30 Front Panel

FEATURES

GENERAL FEATURES

• 32 character high-intensity alphanumeric LED display

• Sunlight readable full alphanumeric display

• Automatic display intensity

• Back-lit buttons

• 200 channel memory (stored alphabetically)

• Remote frequency flip-flop input pin

NAVIGATION RADIO FEATURES

• 200 channel Nav with solid state DSP technology

• VOR/Localizer and Glideslope receivers

• Built-in VOR/Localizer converter

• Frequency range: VOR 108.00 – 117.95 MHz

Localizer 108.00 – 111.95 MHz
Glideslope 328.60 – 335.40 MHz

• Digitally decoded OBS setting

• Manual selection of back course approach

• Automatic display of station ID by decoding Morse code

• Interfaces to most CDI (w/resolver), HSI, and autopilot systems

• VOR receiver displays To or From radial of the active channel

• VOR monitor displays From radial of the standby channel

• Back course annunciator output

• LOC enable annunciator output

2 Apollo SL30 Installation Manual

Introduction

• Internal RF diplexor

• Active and standby flip/flop frequencies

• DME tuning and data display

COMM RADIO FEATURES

• 760 communications channels

• Frequency range 118 to 136.975 MHz

• Active and standby flip/flop frequencies

• Volume control

• Tunes to National Weather Service broadcasts

• Transmit status indicator

• Frequency monitor function (listens to standby while monitoring active)

• Emergency channel menu

• Squelch test function

• Stuck Mic time-out

• 12 watt audio amplifier

• Includes two-place VOX intercom

PHYSICAL SPECIFICATIONS

• 1.3"(H) x 6.25" (W) x 10.5" (D)

• Weight 2.25 lbs. (unit only)

• Depth 11.452 inches (29.09cm) behind panel, including mounting frame and connectors

NAV RADIO PERFORMANCE SPECIFICATIONS

• Input voltage range 10 to 40 VDC

• Operating temperature range –20ºC to +55ºC

• Certified TSO C34e/JTSO C34e (Glideslope receive)

• Certified TSO C36e/JTSO C36e (ILS Localizer receive)

• Certified TSO C40c/JTSO 2C40c (VOR receive)

• Certified TSO C66c/JTSO 2C66b (DME display)

COMM RADIO PERFORMANCE SPECIFICATIONS

• Input voltage range 10 to 40 VDC

• Operating temperature range –20ºC to +55ºC

• Transmit power 8 watts (Carrier Power)

• Certified TSO C37d/JTSO 2C37e (Comm transmitting)

• Certified TSO C38d/JTSO 2C38e (Comm receiving)

• Certified TSO C128/JTSO 2C128 (stuck mic)

Apollo SL30 Installation Manual

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Introduction

SYSTEM INTERFACES

NAVIGATION RECEIVER

The SL30 can be installed in several configurations based upon individual requirements. This
includes with or without an external course deviation indicator. The CDI may be discrete,
serial, or composite.

COMM TRANSCEIVER

For standalone installations, the Comm requires connections to:

• a standard Comm antenna

• a microphone (or microphones)

• a speaker or headphone

• power input

These items may be installed dedicated to the SL30 Comm, or by connection to an audio
panel. The system can be configured to mix the NAV audio with the Comm audio if no
external audio panel is used.

SERIAL INTERFACE

• DME – Distance Measure Equipment

• SL/GX – GPS products

• MX – Multi-Function Display

REGULATORY COMPLIANCE

The Apollo SL30 is designed and tested to meet the following TSOs/JTSOs:

FAA TSO-C37d/JTSO 2C37e for Comm transmit
FAA TSO-C38d/JTSO 2C38e for Comm receive
FAA TSO-C128/JTSO 2C128 for unintentional transmission (stuck mic)
FAA TSO-C34e/JTSO C34e for ILS Glideslope receive
FAA TSO-C36e/JTSO C36e for ILS Localizer receive
FAA TSO-C40c/JTSO 2C40c for VOR receive
FAA TSO-C66c/JTSO 2C66b for DME display

The Apollo SL30 complies with the FCC requirements specified in:

CFR 47, Part 87, Aviation Services, Subpart D, Technical Requirements

The Apollo SL30 complies with the FCC requirements specified in:

CFR 47, Part 15, Radio Frequency Devices, Subpart B, Unintentional Radiators

The Apollo SL30 software is designed and tested to RTCA/DO-178B, level C and ED-12B,
level C.

Note: Unauthorized changes or modifications to the SL30 may void the
compliance to required regulatory agencies and authorization for continued
equipment usage.

4 Apollo SL30 Installation Manual

Introduction

UNPACKING THE EQUIPMENT

Carefully unpack the equipment. Visually inspect the package contents for any evidence of
shipping damage. Retain all shipping containers and packaging material in case reshipment is
necessary.

PACKAGE CONTENTS

As shipped from the Garmin AT factory, the Apollo SL30 package includes most items
necessary for installation other than supplies normally available at the installation shop, such
as wire and cable ties, and required input and output equipment. The standard items included
in the package are listed in Table 1.

Part # Description Qty
430-6040-3xx SL30 NAV/COMM 1

Install kits Part number: 424-2006-300
162-1575 15-pin d-sub connector shell 1

162-1577 37-pin d-sub connector shell 1
162-1008 Right angle coax plug 2
202-0001 Cable tie 2
204-0037 Edge grommet 6"
204-2100 Shoulder bushing 4
221-0400 4-40 x 1/4 SS pan head Phillips machine screw with lock

washer
224-0404 4-40 x 1/4 SS flat head Phillips machine screw 4
245-0027 Crimp contact for d-sub, 20 to 24 awg wire 50
310-5181-xx or

310-5197-xx
310-5192-xx Connector mounting plate 1
998-0048 3/32 hex driver 1
Manual kits Part number: 564-0064-300 -4xx

560-0403-xx SL30 User’s Manual 1
560-0404-xx SL30 Installation Manual 1
561-0262-xx SL30 Quick Reference Guide 1
Accessories

115-0007 NAV signal splitter/combiner Optional
S712-0007-012 Internal 3 amp slow blow fuse Optional

Mounting frame

NOTE: Only 310-5197-xx is qualified for helicopter use.

Note: Package contents may vary depending on how the unit is ordered.

Table 1 - Package Contents

8

1

Apollo SL30 Installation Manual

5

Introduction

OTHER REQUIRED MATERIALS

The SL30 is intended for use with standard aviation accessories. External devices required for
various installations are listed below. Depending upon the installation, this will include items
such as:

• back course annunciator

• a CDI or HSI

• a Comm antenna

• NAV antenna

• NAV antenna splitter (if dual SL30)

• a microphone(s)

• a speaker or headphone

• audio panel

SPECIAL TOOLS REQUIRED

Crimp Tool

A crimp tool meeting MIL specification M22520/1-01 and a positioner/locater are required to
ensure consistent, reliable crimp contact connections for the rear 15-pin and 37-pin
connectors. These tools are available from:

For pin P/N 245-0022

Astro Tool Corp. Phone [phone]
21615 SW TV Highway Fax [phone]
Beaverton, OR 97006

Crimp tool: Astro Tool part #615708
Positioner: Astro Tool part #616356

For pin P/N 245-0027

ITT Cannon Phone [phone]
1851 E. Deere Ave. Fax [phone]
Santa Ana, CA 92705-6500

Insertion tool: ITT part # 274-7006-000 (Desc. CIET-20HD)
Regular duty Crimp tool: ITT part #995-0001-585 (Desc. M22520/1-01)
Regular duty Locator tool: ITT part #995-0001-244 (Desc. TH25)
Heavy duty Crimp tool: ITT part #995-0001-584 (Desc. M22520/2-01)
Heavy duty Locator tool: ITT part #995-0001-604 (Desc. M22520/2-08)

6 Apollo SL30 Installation Manual

Introduction

LICENSE REQUIREMENTS

An aircraft radio station license may be required for operation of the SL30 Comm transmitter
once installed in the aircraft. An application must be submitted on FCC Form 404, Form 605
or later revised application, which may be obtained from the FCC in Washington, DC, or any
of its field offices. Procedures for applications are in CFR 47, Part 87, Aviation Services,
Subpart B, Applications and Licenses.

Apollo SL30 Installation Manual

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Introduction

NOTES

8 Apollo SL30 Installation Manual

Installation

SECTION 2 - INSTALLATION

This section describes the installation of the SL30 including mounting, wiring, and
connections. A post installation check-out procedure is included at the end of this section.

PRE-INSTALLATION INFORMATION

Always follow good avionics installation practices per FAA Advisory Circulars (AC) 43.13­1B, 43.13-2A, and AC 20-67B, or later FAA approved revisions of these documents.

Follow the installation procedure in this section as it is presented for a successful installation.
Read the entire section before beginning the procedure. Perform the post installation check­out before closing the work area in case problems occur.

INSTALLATION OVERVIEW

A successful installation should start with careful planning including determination of
mounting location for the SL30, antenna mounting, connections to microphones, speakers,
and headphones, cable routing, and other required modifications. Once the mounting location
has been determined, prepare the mounting frame for installation. It may be easier to complete
the wiring harness and attach the connectors to the mounting frame before installing the
mounting frame.

INSTALLATION CONSIDERATIONS

MOUNTING CONSIDERATIONS

The SL30 is designed to mount in the avionics stack in the aircraft instrument panel within
easy view and reach of the pilot. The standard package includes a mounting frame for ease of
mounting, connections, and service of the unit. Allow an additional one-inch clearance to the
rear of the mounting frame for connectors and cables.

For typical installations, the SL30 does not require external cooling. When mounting the unit,
leave a clearance of 1/8 to 1/4 inch between avionics to allow for air circulation.

MINIMUM SYSTEM CONFIGURATION

VFR Installation

VFR installation need only include an SL30 with power, audio, and antenna connections.
Without an external CDI, no glideslope information is obtainable. However, the unit will
maintain full VOR and Localizer functionality including an internal CDI display.

IFR VOR/LOC Installation

IFR installation requires:

• SL30

• External CDI/HSI indicator that meets the following criteria:

1. The course deviation indicator shall have an input impedance of 1 k ohm ± 10% and a

deflection sensitivity of 150 mV ± 10% for full scale deflection.

2. The valid flag shall have an input impedance of 1 k ohms ± 10%.

Apollo SL30 Installation Manual

9

Installation

3. The valid flag sensitivity shall be 125 mV ± 10% for the flag to leave the stop and

260 mV ± 10% maximum for flag to be fully concealed.

4. The To/From flag shall have an input impedance of 200 ohms ± 10% and a sensitivity

of ± 40 mV ± 15% at 25oC with flag fully in view.

5. The OBS resolver should be compatible with a standard 6-wire OBS interface:

H ...........Reference output high

C............Reference output low

D ...........S1 COS input high

E............S3 COS input low

F ............S4 SIN input high

G ...........S2 SIN input low

Any electrical zero crossing will work because the SL30 will calibrate out any errors.

Glideslope Installation

Glideslope installation requires:

• SL30

• External non-numeric glideslope indicator that meets the following criteria:

1. The glideslope deviation shall have an input impedance of 1 k ohm ± 10% with a

deflection sensitivity of 150 mV ± 10% for full scale deflection.

2. The glideslope valid flag shall have an input impedance of 1 k ohm ± 10%.

3. The glideslope valid flag sensitivity shall be 125 mV ± 10% for the flag to leave the

stop, and 260 mV ± 10% maximum for flag to be fully concealed.

Helicopter Requirements

The SL30 is qualified for helicopter installation with certain mount tube and SL
configurations (see Section 4 – Limitations).

EQUIPMENT MOUNTING

Once the cable assemblies have been made, attach the 15- and 37-pin d-sub and coaxial cable
connectors to the rear connector mounting plate and the mounting frame as illustrated in
Figure 4 and Figure 5. Route the wiring bundle as appropriate. The rear connector plate
should be attached to the mounting frame before installing the frame in the instrument panel.
The rear connector plate can be used to tie down the cable assemblies. Use the supplied edge
guard to protect the cable from sharp edges. Connect the shield grounds directly to the
connector mounting plate.

Once the cable assemblies are complete and the connectors are attached to the mounting
frame, install the mounting frame assembly in the instrument panel as illustrated in Figure 2.
Be sure to use low-profile head screws in the side of the mounting frame so the unit will slide
in and out freely. Attach the front of the mounting frame to the instrument panel. Use support
brackets to attach the rear of the frame to the aircraft.

MOUNTING TUBE INSTALLATION

Care must be taken when installing the mounting tube to ensure you can properly insert and
secure the unit. There must be a minimum vertical spacing of 0.040 inches between units to
prevent interference with the cam locking mechanisms. Mounting tubes with clearance

10 Apollo SL30 Installation Manual

Installation

dimples help maintain the proper clearance. The mounting tube must be installed with the
clearance dimples pointing up.

The mounting tube should be flush to the instrument panel and allow sufficient clearance for the
back of the bezel of the unit to mount flush to the mounting tube. Sufficient clearance must exist
in the instrument panel opening to allow ease of insertion and removal of the unit. If the back

of the unit bezel does not mount flush to the mounting tube, the connector may not
engage fully.

Figure 2 - Full Stack Mounting Tube Spacing

Secure the mounting tube to the instrument panel structure. Mounting screw heads must not
protrude into the mounting tube. Be sure to use the appropriate screws so the unit will slide in
and out freely. The screws attaching the mounting tube to the instrument panel structure must
not interfere with the insertion of the unit. Failure to prevent interference will result in
damage to the unit or prevent its insertion. Take care that the mounting tube is not distorted
when it is attached to the instrument panel and structural supports. Shims may be necessary to
properly install the mounting tube. If the mounting tube is distorted out of square, the unit may
either bind when being inserted or the cam lock may not engage.

Apollo SL30 Installation Manual

11

Installation

UNIT INSERTION

Position the cam lock as shown below. The front lobe of the cam should be vertical. The cam
lock mechanism should be fully unscrewed (turned counter-clockwise). Slide the unit into the
frame. Turn (clockwise) and carefully hand-tighten (4 in-lb max.) the cam lock mechanism
using only the 3/32" hex driver provided in the installation package. Using a larger tool than
the one provided makes it easy to exceed the allowable torque on the cam lock resulting in
damage to the unit. The unit will be pulled into the frame securing the unit and the connectors
when fully engaged. Do NOT overtighten. The back of the bezel must be flush to the
mounting tube. If the cam lock is hard to turn or the unit does not seat fully, the unit is
probably binding and the mounting tube should be checked.

Figure 3 - Cam Lock Positioning

UNIT REMOVAL

To remove the unit from the mounting frame, turn the screw counter-clockwise with the hex
driver to unscrew the cam lock mechanism. The unit will begin to pull away from the
mounting tube. Turn the screw until slight resistance is felt and then pull the unit from the
frame. Do not exert excessive turning force at the end of the cam lock travel or the unit
may be damaged. With the cam lock fully disengaged, pull the unit straight out holding onto
the sides of the bezel. It is not recommended that you pull the unit out by the rotary knobs. No
special extraction tools are required, if the mounting tube is properly installed.

12 Apollo SL30 Installation Manual

Installation

Figure 4 - Mounting Frame Assembly

Figure 5 - Cable Routing

Apollo SL30 Installation Manual

13

Installation

ELECTRICAL CONNECTIONS

The SL30 installation kit includes 15- and 37-pin d-sub shells and crimp contacts. The crimp
contacts are specified for 20 to 24 awg wire. Make the crimp connections with a crimp tool as
specified on page 6. All wires should be 20 to 24 AWG unless otherwise specified. Wiring
diagrams are included in this section.

POWER

The SL30 requires two power connections, one for the Nav side of the unit, the other for the
Comm. Make the power connections to the unit using 20 awg wire.

The Comm power input is internally fused at 7 amps. A separate 5 amp circuit breaker or
fuse should be installed for downline overload or short circuit protection.
The NAV internal fuse is 3 amps. A separate 2 amp circuit breaker or fuse should be installed
for downline overload or short circuit protection.

Note: Circuits should be protected in accordance with guidelines in AC 43.13-1B,
chapter 11, section 4.

Warning

When connecting power to the unit, reversing the polarity of the connection will
blow the internal fuse. The internal fuse requires replacement at the factory or
factory authorized repair center.

AVIONICS OUTPUTS

The SL30 includes a complete avionics interface for resolvers, CDI/HSI indicators, autopilot,
and back course annunciator. These outputs are to be connected as appropriate for the
particular installation. The CDI/HSI outputs may be connected to a dedicated CDI or HSI or
to a shared indicator using an appropriate switching relay, such as an Apollo ACU. The
avionics outputs available are listed in the Avionics Outputs specification on page 42.
Connect the annunciator outputs as necessary.

SERIAL INTERFACE

The SL30 includes an RS-232 serial port for making optional connections. The serial port can
be used for connecting to:

• Resolvers, indicators, or electronic flight instruments that accept serial data

• GX series units for Comm/NAV frequency transfers from the database

• MX20 to display VOR data on a map and database interface

• RMI/DME control box allows DME tuning, DME display, and OBI output

When making connections to the SL30, use a three conductor shielded cable. Make RxD,
TxD, and signal ground connections to the 37-pin connector. Connect the shield(s) to the rear
of the mounting frame on the connector plate. The shield leads must be < 1.25 inches.

Complete serial interface specifications are included in Appendix E – Serial Interface
Specifications.

SPEAKER AND HEADPHONE OUTPUTS

Connect the speaker and headphones to the output pins on the rear connector.

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Installation

MICROPHONE INPUTS

Microphone input connections should be made using a twisted pair shielded cable. Attach the
signal ground to the mic ground pin on the rear connector and connect the shield to the rear
connector plate.

TRANSMIT KEY INPUT

The TxKey input on the rear connector must be pulled low to ground to enable the
transmitter. This input should be connected to a microphone or yoke mounted momentary
push button switch.

INTERCOM SELECTOR SWITCH

The SL30 includes a voice activated intercom function that can be enabled by an external
control switch. This is an optional connection.

When making connection for the intercom selection, connect the intercom selection input to a
remote mounted normally open switch (an alternate action switch can be used). Connect the
other terminal of the switch to ground. The intercom function is enabled when the input is
pulled low to ground.

REMOTE FLIP/FLOP INPUT

The SL30 includes a remote flip/flop input. This is an optional input that can be connected to
a remote mounted (such as on the yoke) momentary push button switch which pulls the input
low to ground. The remote flip/flop input will only toggle the Comm frequencies when Comm
frequencies are displayed and will only toggle NAV frequencies when NAV frequencies are
displayed.

ANTENNA INSTALLATION AND CONNECTIONS

COMM AND NAV ANTENNAS

The SL30 requires a standard 50Ω vertically polarized Comm antenna and a horizontally
polarized NAV/VOR/Localizer/Glideslope antenna. Follow the antenna manufacturer’s
installation instructions for mounting the antennas. The Comm antenna should be a standard
Comm antenna that operates on Comm frequencies between 118.00 and 137.000 MHz. The
NAV antenna should be a VOR/Localizer/Glideslope NAV antenna that receives VOR
frequencies between 108 and 117.95 MHz, and localizer frequencies between 108 and 112
MHz and glideslope information between 328.6 and 335.4 MHz.

The NAV and Comm antennas should also be mounted as far apart as practical from the ELT
antenna, preferably one on top and the other on the bottom of the aircraft fuselage. Some
ELTs have exhibited re-radiation problems generating harmonics that may interfere with GPS
signals. This can happen when the Comm (SL40 or any other Comm) is transmitting on
certain frequencies such as 121.15 or 121.175 MHz, which may cause the ELT output circuit
to oscillate from the signal coming in on the ELT antenna coax.

The antenna coax cable should be made of RG-142B or a comparable quality 50Ω coax.
Assembly instructions for the rear coax connector are included in Figure 6.

Apollo SL30 Installation Manual

15

Installation

Step 1.

0.031

Clamp Nut

Slit 1/4" (2X)

0.125

0.375

- Slide clamp nut over coax.

- Strip coax as illustrated.

- Cut two 1/4" slits in jacket 180
degrees apart.

Step 2.

Step 3.

Assembly instructions for right angle connector part #162-1008

Braid Clamp

Cap

Solder Center
Conductor

- Slide braid clamp over end of coax and
under the braid.

- Insert coax with braid clamp into
connector and tighten clamp nut securely.

- Solder the center conductor of the coax
to the contact as illustrated.

- Attach the cap and secure tightly.

Figure 6 - Rear Coax Connector Assembly

USE OF SPLITTER AND COMBINER

The SL30 is the smallest, most advanced NAV/Comm unit on the market. Its size dictates
room for only one Comm antenna input and one NAV antenna input. It incorporates an
internal diplexor circuit. This means that the input VHF signal must not strip the glideslope
(330 MHz) signal from the NAV (108 MHz) signal. Do not install an external diplexor.

It is recommended that a single VOR/Localizer/Glideslope antenna be used for the
installation. Most VOR/LOC-only antennas will still provide an adequate glideslope signal
for the Apollo SL30 to operate normally. In rare cases, it may be necessary to combine
antenna signals. When the signals are combined, the systems overall performance may be
slightly degraded, but the glideslope signal may increase to an acceptable level.

Dual Antennas

If separate VOR and glideslope antennas are used on the aircraft, a splitter/combiner must be
used.

VOR/LOC Antenna

GS Antenna

1

Splitter/

Combiner

2

S

SL30 NAV Input

16 Apollo SL30 Installation Manual

Installation

Dual SL30s

If dual SL30s are installed in the aircraft, a splitter must be used.

VOR/LOC/GS Antenna

Splitter/

S

Combiner

1

2

SL30 #1

SL30 #2

Dual Antennas and Dual SL30s

If dual SL30s and separate VOR and glideslope antennas are installed in the aircraft, a
combiner and a splitter must be used.

VOR/LOC Antenna

GS Antenna

1

Splitter/

Combiner

2

SS

Splitter/

Combiner

1

2

SL30 #1

SL30 #2

Installations should use an appropriate splitter/combiner, such as the Mini-Circuits ZFSC-2­1B BNC, available as an option under the Garmin AT part number 115-0007. This unit has
been fully environmentally qualified for use with single and dual SL30 installations.

EQUIPMENT INTERFACE

Figure 12 through Figure 22 illustrate typical equipment configurations. SL30 installation is
not limited only to equipment shown. The installer must ensure each article interfaced to the
SL30 meets the interface specification listed in this manual.

Apollo SL30 Installation Manual

17

Installation

Figure 7 - SL30 Comm Wiring Diagram

18 Apollo SL30 Installation Manual

Installation

Figure 8 - SL30 Comm Typical Audio Panel Connections

Apollo SL30 Installation Manual

19