ARNAV RCOM-100 User manual

ARNAV Systems, Inc.
16923 Meridian East
P.O. Box 73730
Puyallup, Washington 98375
[phone]
RCOM-100
Installation GUIDE
PART NUMBER 570-8050B
27 November 2002
Proprietary Notice
The Information contained in this document is proprietary to ARNAV Systems,
Inc., and shall not be reproduced or disclosed in whole or in part to persons not
authorized by ARNAV.

ARNAV Systems, Inc. 1Document No. 570-8050B
27 November 2002
REVISIONS
REV DESCRIPTION DATE APPROVAL
-Initial Release August
2002 LAJ
AMinor Changes 11/15/02 LAJ
BAdded Antenna Doubler 11/27/02 LAJ

ARNAV Systems, Inc. 2Document No. 570-8050B
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TABLE OF CONTENTS
1. INTRODUCTION..................................................................................................................................................3
2. OVERVIEW ............................................................................................................................................................3
3. INSTALLATION...................................................................................................................................................4
Installation Kit:............................................................................................................................................................4
Determining Mounting Locations:...........................................................................................................................4
Table 3-1 Transmit Cable Lengths...........................................................................................................................5
Table 3-2 Receive Cable Lengths.............................................................................................................................5
Securing The Mounting Tray:...................................................................................................................................6
Transmit/Receive Antenna Installation:..................................................................................................................7
Mounting the NAT PTA-12 Dialer:.........................................................................................................................9
VC28 Mounting:........................................................................................................................................................10
Route Coax Cables for Tx and Rx:.........................................................................................................................10
Wiring the RCOM-100, VC28, PTA-12: ..............................................................................................................11
Description...........................................................................................................................................................12
4. DATA PORT .........................................................................................................................................................13
Asynchronous Services:...........................................................................................................................................13
Packet Services:.........................................................................................................................................................13
5. SYSTEM TESTING..............................................................................................................................................14

ARNAV Systems, Inc. 3Document No. 570-8050B
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1. INTRODUCTION
The RCOM-100 is a Globalstar satellite telephone for aviation. It is housed in an ARINC 600 2
MCU enclosure. The RCOM-100 is designed to provide voice and data communication in an
avionics application.
The voice connection is established through a standard TIP/RING interface. The RCOM-100 can
be connected to any standard telephone handset that complies with EIA/TIA-464B and
TIA/EIA/IS-470-B.
The data connection is through the RCOM-100 data port. The data port supports two types of
data services: asynchronous data, and packet data. Asynchronous data provides the capability
of establishing a connection between a device connected to the data port, and any Hayes
compatible modem connected to the Public Switch Telephone Network. For packet data the
device connected to the data port must be able to support a PPP session over TCP/IP. This is the
typical standard used by computers for dial-up services.
The installation to the RCOM-100 consists of:
•Locating and mounting the transmit/receive antenna
•Installation of the mounting tray for the ARINC 600 2MCU box
•Locating and mounting the NAT PTA-12 Dialer
•Locating and mounting the VC28 DC-to-DC converter (14 to 28 volts for PTA-12_
•Wiring the RCOM-100 37 pin circular connector for power, tip/ring, and the data
connection port.
•Wiring the PTA-12 to the Audio Panel.
Installation Requirements:
When installing the ARNAV RCOM-100 the installer must have a working knowledge of aircraft
electronics installation, and be a holder of a FAA Repairman’s Certificate.
All installations should meet the requirements of FAA advisory circular AC43.13-1B.
2. OVERVIEW
The main tasks for this installation are listed below:
1. Check the shipped installation kit components against this manual.
2. Determine the approximate location of the RCOM-100, the transmit/receive antenna, the
PTA-12, and the VC28. Factors considered for locations are minimum and maximum
antenna coax lengths, and minimum GPS and transmit antenna separation.
3. Mount the ARINC 600 2 MCU tray.
4. Mount the transmit/receive antenna.

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5. Mount the PTA-12
6. Mount the VC28.
7. Route the coax cables for transmit and receive to the ARINC 600 2 MCU tray.
8. Create the wire harness for the RCOM-100 and PTA12.
9. TIP/RING voice communications check out.
3. INSTALLATION
Installation Kit:
ITEM
#ARNAV P/N QTY DESCRIPTION
1150-1115 4Connector, TNC
2150-2168 1Receptacle, Circular 37 Pin
3ENG-7069 1Mounting Frame Assembly, ARINC 600 2 MCU
4870-1575 1Antenna, RF Transmit/Receive Satcom
5NAT PTA-12 1NAT Phone Dialer Panel Equipment
6453-0917 1VC28 14 to 28 volt converter
7570-8050 1RCOM-100 Installation Manual
Determining Mounting Locations:
There are two basic restrictions for mounting locations. The first restriction is the distance
between the equipment mounting location and the transmit/receive antenna location. The second
restrictions is the distance allowed between the transmit antenna and any GPS antenna located
on the aircraft. The data below will help identify proper equipment and antenna locations.
Transmit/Receive antenna and equipment location:
The Transmit/Receive antenna and associated coaxial lines have a minimum and maximum
signal loss that must be adhered to. Exceeding the min/max signal strength by having an
improper coax length may cause poor performance.
The first step is to select the cable and then determine the length of cable that falls in the
min/max signal loss window. The coax selection and length will determine the distance between
the antenna and the RCOM-100.
The transmitter is at 1.6Ghz.
Transmitter Minimum Loss: 0.66db
Transmitter Maximum Loss: 1.66db
The receiver operates at 2.5Ghz.
Receiver Minimum Loss: 1.14db
Receiver Maximum Loss: 7.14db

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The tables below identify different coax cable types that can be used and shows minimum and
maximum cable lengths for that coax type. Any other quality coax type can be used as long as
the signal loss falls between the minimum and maximum db requirements.
Table 3-1 Transmit Cable Lengths
Part Number Cable
Outside
Diameter in
Inches
Bend Radius
in Inches Minimum Length in
Feet
Maximum
Length in
Feet
Cable Loss
per foot
ECS Cable
3119010.195 14.4 11 0.1513
311601 0.229 1.15 3.7 9.4 0.1768
311501 0.229 1.15 7.5 18.9 0.0877
Table 3-2 Receive Cable Lengths
Part Number Cable
Outside
Diameter in
Inches
Bend Radius
in Inches Minimum Length in
Feet
Maximum
Length in
Feet
Cable Loss
per foot
ECS Cable
311901 0.195 15.7 35.7 .2
311601 0.229 1.15 8.2 51.5 .13850
311501 0.229 1.15 10.3 64.3 .11100
GPS antenna proximity to transmit/receive antenna:
Due to potential transmit power saturation of a GPS antenna input, there must be a minimum
separation between any GPS antenna and the transmit antenna. For a typical active GPS
antenna for aviation the minimum separation should be 2 feet. For least interference between the
antennas a preferred distance between antennas is 4 feet. The preferred distance may not be
practical on aircraft installations so every effort should be made to provide the most separation
that circumstances permit.
NOTE: Some GPS antennas provide a filter prior to the pre-amp that helps provide more
rejection of non-GPS frequencies. If the GPS antenna can provide additional filtering the
separation requirement can be reduced. In any case the GPS performance must be verified
during the post-installation ground check.
When routing the coaxial cables make sure to identify the cables so they can be connected to the
proper location. There are 2 cables with TNC connectors on both ends and all appear to be the
same.
Once the antennas and RCOM-100 locations have been verified to meet the above restrictions
the installation can proceed.
For mounting location in the Cessna 180 series aircraft refer to drawing ENG-5021. The shown
locations for Antenna, and RCOM-100 comply with the requirements listed above. If the exact
locations on drawing ENG-5021 are used, the drawing also shows information for weight and
balance calculation.

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Securing The Mounting Tray:
Refer to drawings ENG-4985 and ENG-7069 in appendix A. The ENG-7069 drawing shows the
mounting tray assembly with 4 Barry Mount vibrations isolators and the mounting holes and the
screws to be used. The ENG-4985 drawing shows the RCOM-100 in the mounting tray with
dimensions. Page 2 of ENG-4985 shows the RCOM-100 center of gravity. Prepare the mounting
location to provide a good electrical bond between the mounting tray and the airframe. If the
removal of paint is required to obtain this electrical bond it should be done.
Prepare the mounting holes and secure the equipment-mounting tray. Place the RCOM-100 into
the mounting tray and secure it with the lockdown knob.
RCOM-100 and VC28 Mounting

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Transmit/Receive Antenna Installation:
Refer to SENSOR Systems drawing S67-1575-164 in Appendix A. S67-1575-164 shows the
dimensions of the antenna and mounting holes. Refer also to drawing ENG-5022. ENG-5022 is
the antenna mounting template diagram. It is scaled 1:1 so it can be used to mark hole locations
and antenna outline.
The antenna will secured through the aircraft skin at the top center of the fuselage 112.5 inches
back from the firewall.
Prepare the mounting location by drilling holes in the aircraft skin or through a mounting plate.
Installation of an antenna on the aircraft should be performed only as defined by the aircraft
manufacturer.
In addition to the location for the mounting, the aircraft surface should be prepared by removing
the paint where the antenna will attach to the skin.
Note: The bond between the airframe and the antenna needs to be 10 milliohms or less. Make
sure that this antenna has a spatial separation of 45dB between it and any GPS antennas (as
defined above).
You should note and mark on the antenna which terminal is Tx and which is Rx so that the mark
can be seen after the antenna is mounted on the airplane.
From the inside of the aircraft secure the antenna using the supplied “O-Ring” and doubler plate
(402-1575). Refer to drawing ENG-5026 showing the antenna/O-ring/skin/doubler stackup.
After antenna is secure, seal around the base of the antenna with RTV compound to keep
moisture from getting between the antenna and the aircraft skin.
The picture below show the Antenna mount from the outside the aircraft.

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Antenna Mount –Outside View

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Mounting the NAT PTA-12 Dialer:
Refer to the NAT PTA12-000 Installation and Service Manual (SM55) in Appendix B for
dimensions and mounting information.
For locating the PTA-12 refer to the picture below. The PTA-12 is mounted in the panel just
above the pilots left knee.
PTA-12 Dialer Install Location

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PTA-12 Close-Up
VC28 Mounting:
Refer to drawing ENG-5023 in appendix A. The ENG-5023 drawing shows the mounting
template for the VC28 DC-to DC converter. The template is scaled 1:1 so it can be used to mark
locations for mounting the VC28 to the airframe. The VC28 is located next to the RCOM-100
(see drawing ENG-5021). Prepare the mounting location to provide a good electrical bond
between the VC28 and the airframe. If the removal of paint is required to obtain this electrical
bond it should be done.
Prepare the mounting holes and secure the equipment.
Refer to the picture above (RCOM-100 and VC28 Mounting). The VC28 is just to the left of the
RCOM-100 and is mounted to the equipment shelf.
Route Coax Cables for Tx and Rx:
Refer to Drawing ENG-5021 to see Coax routing location. The coax pair routes from the Antenna
down the right side of the aircraft then back to the RCOM-100. Make sure the correct coax for
the Tx and Rx channels is selected and make sure they are attached to the correct antenna
terminal and RCOM-100 terminal. Refer to the tables above for coax selection. The cables have
a minimum and a maximum db loss and the Tx and Rx are at different frequencies. The cables
are not interchangeable.
As the cables are routed from the antenna to the RCOM-100, make sure that the do not interfere
with any aircraft control cables. Secure the cables to the aircraft framework so that they will not
come loose or interfere with moving objects.

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Wiring the RCOM-100, VC28, PTA-12:
Table 3-3 is the pin definition for the circular 37-pin connector. The RCOM-100 has been
designed to work with either a 28VDC aircraft or a 14VDC aircraft. TIP and RING are for EIA/TIA-
464B compatible telephone equipment. The DATA PORT shows how it should be wired up to a
DB-9 female connector, which should then plug into a DTE device.
Refer to wire diagram ENG-5024.
Refer to wire routing on drawing ENG-5021. Route wires from the back of the aircraft at the
RCOM-100 along the right side of the aircraft and below the doorframe to the area behind the
control panel where the wires connect to the audio panel and PTA-12. Assured that the cables
are secured and avoid routing near any control cables or moving surfaces.
Connect the aircraft equipment per wire diagram ENG-5024. Add a 5-amp circuit breaker for the
RCOM-100 and a 1-amp circuit breaker for the PTA-12.
The telephone audio can come from either the PTA-12 dialer as a headset microphone interface
(see NAT PTA-12 Install manual –Appendix B), or it can interface with an existing audio panel.
This install drawing shows connection to an audio panel with a Tip/Ring telephone interface. For
audio panels without the Tip/Ring telephone input, refer to the NAT PTA-12 install manual for
instructions on connecting the PTA-12 audio signals into an audio panel.

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Table 3-3 Circular 37 Pin Connector Description
PIN # Description
1DATA PORT RXD (OUTPUT) TO DB9 FEMALE PIN 2
2
3
4
5DATA PORT CTS (OUTPUT) TO DB9 FEMALE PIN 8
6DATA PORT TXD (INPUT) TO DB9 FEMALE PIN 3
7DATA PORT RI (OUTPUT) TO DB9 FEMALE PIN 9
8DATA PORT RFR (INPUT) TO DB9 FEMALE PIN 7
9POWER RETURN
10 POWER
11
12
13
14
15 RING
16 TIP
17
18
19 DATA PORT SIGNAL RETURN -TO DB9 FEMALE PIN 5
20
21
22
23
24
25 DATA PORT RLSD (OUTPUT) TO DB9 FEMALE PIN 1
26 DATA PORT DTR (INPUT) TO DB9 FEMALE PIN 4
27
28
29
30
31
32
33
34
35
36
37

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4. DATA PORT
The Data Port allows the user to connect a computer to the RCOM-100 to access data services.
There are 2 types of data services handled by the Data Port: Asynchronous, and Packet Data. In
both of these services the equipment interfacing to the RCOM-100 must be configured for 19200-
baud, 8 bits, 1 stop bit, no parity, hardware handshaking, with EIA/TIA RS-232 standard signal
levels.
The data port in the RCOM-100 is wired to a DB9 connector and is intended for use by only
approved computing devices in the aircraft. If the data port is used by an approved device, the
instructions below define the data port capabilities and requirements.
Asynchronous Services:
Asynchronous Services establishes a data connection between a computer or other device
connected to the data port, and any Hays compatible modem that is connected to the Public
Switched Telephone Network. The connection between the device and the remote modem is
accomplished by dialing from the AT command line the number of the remote modem (i.e.
ATD18883359533 <ENTER>). Once the connection is established between the 2 modems,
binary data, or ASCII data can be transmitted. Sending the “+++” followed by a delay of longer
than 1 second then the “ATH” terminates the connection.
Packet Services:
The data connection is established by the computer issuing a dialing command “ATD#777
<enter>”. This starts a PPP session using the TCP/IP protocol. Sending the “+++” followed by a
delay of longer than 1 second then the “ATH” terminates the connection.
The PPP connection using TCP/IP can be set up as a standard Windows Dial Up networking
connection or it can be part of the connecting application. In order to access data through the
Packed Services you must have an Internet service provider that allows remote connection
through a gateway. Your dial up connection must be set up as follows:
Modem Setup:
Add the RCOM-100 Qualcomm modem INF file to your computer:
Windows 98 example:
Select: Start –Settings –Control Panel –Modems
Select: Add Modem
Check: Do not detect modem; I will select it from a list
Select: Next
Select: Have Disk
Insert the supplied floppy disk into the A: drive
Make sure the A: drive is selected as the file source and select OK
The Modem will be identified as Qualcomm Globalstar Phone Modem
Select: Next
Select: the communications port on your computer that will connect to the RCOM-100
Select: Next
Select: Finish
In the Modem Properties Dialog Box –Select the new Globalstar Modem and click Properties
Change the Baud Rate to 19200 and press OK

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Dial Up Connection:
Under “My Computer” –Dial Up Networking --, Make a New Connection
Select: Qualcomm Globalstar Phone Modem
COM port connected to Data Port of RCOM-100
Baud Rate 19200
8 Bit
1 Stop Bit
No Parity
Hardware Handshaking
Phone Number = #777
Type of Dial Up Server = PPP
Allowed Network Protocols = TCP/IP
Enable Software Compression = Yes
TCP/IP Settings
Server Assigned IP Address
Specify name server addresses
Primary DNS = Provided by your internet service provider
Secondary DNS = Provided by your internet service provider
Use IP Header Compression
Use Default Gateway on Remote Network
When connecting to the “Dial Up Networking” connection you must enter your User name and
Password for your Internet Service Provider.
5. SYSTEM TESTING
Phone Test:
Using the PTA-12 with Phone capable audio panel:
Move the aircraft out of any hanger or enclosed area so the antenna has a clear view of the sky.
The RCOM-100 is taken off hook by selecting “TEL” on the audio panel. After selecting “TEL”
there will be a dial tone. Press the “Hook” switch on the PTA-12 then dial the number to place a
call.
Dial a phone number and verify that you are able to connect with the number (NOTE: This
telephone requires a full area code and number to make connection. Do not put a “1” in front of
the area code.).
After the call is complete, press “Hook” on the PTA-12 and move the audio panel selector to a
position other than “TEL” . Both the audio panel selector and the “Hook” switch on the dialer
must be off or the phone is still off hook and will not be ready for another call or an incoming call.
To receive a call a ring is heard in the pilot’s headset from the audio panel. Answer the call by
selecting “TEL” on the audio panel. To answer a call there is no interaction with the PTA-12
dialer.

ARNAV Systems, Inc. 15 Document No. 570-8050B
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Using an approved telephone handset:
Hook up a standard telephone handset to the TIP and RING signals from the 37-Pin connector.
Move the aircraft out of any hanger or enclosed area so the antenna has a clear view of the sky.
Take the phone off hook and you should get a dial tone.
Dial a phone number and verify that you are able to connect with the number (NOTE: This
telephone requires a full area code and number to make connection. Do not put a “1” in front of
the area code.).
Data Port Test:
With the aircraft out of any enclosed hanger, hook up a laptop computer to the Data Port
(Assumes that you have terminated the Data Port with a DB-9 female connector.
Using a terminal emulator program with the serial port set up for (19200,8,n, 1). You should be
able to type AT<ENTER> and get an OK back from the RCOM-100. This verifies that the data
port is wired correctly and that you can communicate with the internal Modem of the RCOM-100.
Once you have verified connection with the modem you can test the PPP connection using
TCP/IP. (Verify that you have configured the modem and dial up networking connection as
above, and that you have a working Internet Service Provider)

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Appendix A –Drawings

1
2
2
2
2
3
3
4
4
4
4
5
5
66
66
7
7
7
7
CAD GENERATED DRAWING,
DO NOT MANUALLY UPDATE
SCALE
SIZE
CAD FILE:
DWG. NO.
B
SHEET 1OF 1
REV.
RCOM-100 MOUNTING TRAY
INSTALL DIAGRAM
DATE
APPROVALS
DRAWN
CHECKED
PROJ
ENGR
ISSUED
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES
TOLERANCES ARE:
MATERIAL
FINISH
--
--
DO NOT SCALE DRAWING
ITEM
NO. PART OR
IDENTIFYING NO. NOMENCLATURE
OR DESCRIPTION
REVISION QTY
REQD
PARTS LIST
THE INFORMATION CONTAINED IN THIS DRAWING IS THE SOLE PROPERTY OF
ARNAV SYSTEMS, INC. ANY REPRODUCTION IN PART OR WHOLE WITHOUT
THE WRITTEN PERMISSION OF ARNAV SYSTEMS, INC. IS PROHIBITED.
REVISIONS
REV DESCRIPTION DATE APPROVED
ARNAV SYSTEMS, INC.
ENG-7069
DECIMAL
.XX .010
.XXX .005
.XXXX .0010
ANGULAR
.5 JR 10/08/02
11
16923 MERIDIAN EAST
PUYALLUP, WA 98373
B
ORIGINAL RELEASE
A
452-0161 MOUNTING FRAME ASSY, ATR
10/08/02
TITLE
-
2VIBRATION ISOLATOR, BARRY T22-AB-2
34
-
196-0222 #8 WASHER SS
42-246-0007 8-32 X 1/2 FHP SS 4
-
211-0805
ECO-4710 10/09/02
BGH
8-32 X 1/2 PHP201-0805 -8
246-0010 -4
7#8 COUNTERSINK WASHER SS
136-8002 -2
6#8 2IN GROUND STRAP
5

2.35 MAX.
7.75
13.14 REF.
12.64
9.00
13.00
2.65 MAX.
0.75
1.50
2.35
1.00
2.25 3.00 MAX.
14.50 MAX
(FOR HARNESS)
MOUNTING TRAY
ARNAV P/N: 452-0217 OR EQUIVALENT)
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES
DECIMALS
.XX ±0.03
TOLERANCES ANGULAR
.XXX ±0.010
MATERIAL
FINISH
DO NOT SCALE DRAWING
±0.5
APPROVALS
DRAWN BY:
CHECKED
PROJ
ENGR
ISSUED
JR 10/28/02
DATE
SCALE: 1=1
SIZE FSCM NO.
TITLE 16923 MERIDIAN EAST, PUYALLUP, WA. 98373
OUTLINE, MOUNTING TRAY/INSTALL
RCOM - 100
DWG NO.
ARNAV SYSTEMS, INC
ENG-4985
SHEET: 1 of 2
BREV
A
CONTRACT NO.
PROPRIETARY INFORMATION
ARNAV SYSTEMS INC.
May Not Be Reproduced Or
Disclosed Without Prior Written
Consent of
REVISIONS
ORIGINAL RELEASE 01/15/02 DR
LWRGH
CK
APR
DATE
DESCRIPTION
REV
-GH
FOR MOUNTING USE 8-32X3/8 PAN HEAD PHILLIPS SCREW (8 PLCS) (NOT SUPPLIED)
OUTLINE OF PLUG Tx Rx
1.64
1.41
7.591.41
VIBRATION ISOLATOR
GROUNDING STRAP
8.99
TOP OF UNIT SHOULD BE LOCATED NO CLOSER THAN
1.5 IN. FROM ADJACENT AVIONICS OR AIRFRAME
FOR VIBRATION ISOLATOR FLEX CLEARENCE
1.5 1.5
ECO-4710 10/28/02
A

1.15in.
3.7in.
7.1in.
CENTER OF GRAVITY
SCALE
SIZE
CAD FILE:
DWG. NO.
B
SHEET 2OF 2
REV
OUTLINE, MOUNTING TRAY/INSTALL
RCOM - 100
THE INFORMATION CONTAINED IN THIS DRAWING IS THE SOLE PROPERTY OF
ARNAV SYSTEMS, INC. ANY REPRODUCTION IN PART OR WHOLE WITHOUT
THE WRITTEN PERMISSION OF ARNAV SYSTEMS, INC. IS PROHIBITED.
ARNAV SYSTEMS, INC.
ENG - 4985
16923 MERIDIAN EAST
PUYALLUP, WA 98373
REVISIONS
SEE SHEET 1
A
TITLE