Dataradio Gemini PD User manual

GeminiPD
Mobile Radiomodem
Installation Guide
Version 1.42
Preliminary – For Internal Use Only
The entire contents of this manual and the Radio Installation Software
described in this manual are copyright 2000 by DATARADIO Inc.
Copyright DATARADIO Inc.
April, 2001
Part no.: 120 20110-142

Table of Contents
1. PRODUCT OVERVIEW.....................................................................................................................................1
1.1 INTENDED AUDIENCE..........................................................................................................................................1
1.2 GENERAL DESCRIPTION ......................................................................................................................................1
1.2.1 Features....................................................................................................................................................1
1.2.2 Configuration...........................................................................................................................................1
1.3 FACTORY TECHNICAL SUPPORT..........................................................................................................................2
1.4 PRODUCT WARRANTY.........................................................................................................................................2
1.5 REPLACEMENT PARTS .........................................................................................................................................2
1.5.1 Factory Repair .........................................................................................................................................2
1.6 UNPACKING........................................................................................................................................................2
2. INSTALLATION..................................................................................................................................................3
2.1 PLANNING THE INSTALLATION ............................................................................................................................3
2.1.1 Overview...................................................................................................................................................3
2.1.2 Location....................................................................................................................................................3
2.1.3 Cable Path................................................................................................................................................3
2.2 WARNINGS .........................................................................................................................................................3
2.2.1 RF Radiation warning..............................................................................................................................3
2.2.2 Interference with vehicular electronics...................................................................................................3
2.2.3 Secure mounting.......................................................................................................................................4
2.2.4 Explosive environments............................................................................................................................4
2.2.5 Installation in vehicles powered by liquefied gas...................................................................................4
2.3 PHYSICAL UNIT...................................................................................................................................................4
2.3.1 Recommended tools and supplies.............................................................................................................4
2.3.2 Physical mounting of GeminiPD................................................................................................................4
2.4 ELECTRICAL INSTALLATION ................................................................................................................................5
2.4.1 Electrical requirements............................................................................................................................5
2.4.2 Routing of power cable ............................................................................................................................5
2.5 ANTENNA...........................................................................................................................................................7
2.5.1 Recommended tools and supplies.............................................................................................................7
2.5.2 Planning ...................................................................................................................................................7
2.5.3 Antenna Installation.................................................................................................................................8
2.6. COMPLETING THE PHYSICAL INSTALLATION....................................................................................................8
2.7. CHECKING OUT NORMAL OPERATION .............................................................................................................8
3. OPERATING DESCRIPTION............................................................................................................................9
3.1 FRONT & REAR PANELS......................................................................................................................................9
3.2 DTE PORTINTERFACE......................................................................................................................................10
3.2.1 RS-232 Interface Signal Levels..............................................................................................................10
4. WINRIS PROGRAM.........................................................................................................................................11
4.1 OPERATION.......................................................................................................................................................11
4.2 TO CONNECT AND START WINRIS ....................................................................................................................11
4.3 WINDOW ..........................................................................................................................................................12
4.4 FUNCTIONS.......................................................................................................................................................13
4.4.1 “Station Reset” button...........................................................................................................................13
4.4.2 Configuration to a file............................................................................................................................13
4.4.2.1 “Get” button..................................................................................................................................... 13
4.4.2.2 “Get As” button................................................................................................................................ 14
4.4.3 Configuration from a File......................................................................................................................14
4.4.3.1 “Put From” button............................................................................................................................ 14
4.4.4 Special Functions...................................................................................................................................14
4.4.4.1 Banner Field..................................................................................................................................... 14

120 20110-142 ii GeminiPD Installation Guide
4.4.4.2 Comments........................................................................................................................................ 15
4.4.4.3 Password ......................................................................................................................................... 15
4.4.5 Test Functions........................................................................................................................................15
4.4.5.1 DSR signal is High indicator............................................................................................................... 15
4.4.5.2 CTS signal is High indicator............................................................................................................... 16
4.4.5.3 Channel Selection.............................................................................................................................. 16
RSSI & Power Out Indicators.............................................................................................................................. 16
4.4.5.5 TXON tests...................................................................................................................................... 16
4.4.5.5.1 Unmodulated Carrier..................................................................................................................... 16
4.4.5.5.2 Modulated Carrier......................................................................................................................... 17
4.4.5.6 Ping Button...................................................................................................................................... 17
4.4.5.7 Ping addresses.................................................................................................................................. 17
4.4.6 Status Bar...............................................................................................................................................17
5. TROUBLE-SHOOTING AND TESTING .......................................................................................................19
5.1 EQUIPMENT REQUIRED......................................................................................................................................19
5.2 BASIC TESTS.....................................................................................................................................................19
5.3 GPS TEST.........................................................................................................................................................19
6. SPECIFICATIONS.............................................................................................................................................22
FIGURE 1 - MOUNTING PLATE AND SLOT DIMENSIONS......................................................................................................5
FIGURE 2 - BRACKET INSTALLATION ................................................................................................................................5
FIGURE 3 - DC POWER CONNECTOR................................................................................................................................6
FIGURE 4 - ANTENNA SPACING ........................................................................................................................................7
FIGURE 5 - FRONT AND REAR PANELS...............................................................................................................................9
FIGURE 6 - WINRIS WINDOW.........................................................................................................................................12
FIGURE 7 - SELECT PORT WINDOW.................................................................................................................................13
FIGURE 8 - SHOW ALL CHANNEL FREQUENCY ...............................................................................................................16
TABLE 1 - GEMINIPD LEDS INDICATIONS......................................................................................................................10
TABLE 2 - RS-232 SIGNAL LEVELS ................................................................................................................................10
TABLE 3 - CARRIER MODULATION..................................................................................................................................17
TABLE 4 - KEY LATCH INDICATIONS...............................................................................................................................18
TABLE 5 - TESTS, FULL & HALF CHANNEL UNITS..........................................................................................................20
APPENDIX 1 - "OFFICER REQUIRES ASSISTANCE" ALARM FUNCTION .......................................................................24

120 20110-142 iii GeminiPD Installation Guide
What's New in this version
History
Version 1.42 (Preliminary), April 2001
Following sections are amended to show SRRC4FSK 12.5kHz channel spacing
bit rates.
-Section 1.2.1 Features
-Table 3 Carrier Modulation
-Table 5 Tests, Full & Half Channel Units
-Section 6 Specifications
Version 1.41, March 2001
•Section 2.5 “Antenna” and Figure 4 “Antenna spacing” amended to show
FCC’s RF Exposure Guidelines for increased Duty Cycle.
Version 1.40, December 2000
•Supporting footnotes for Gemini/PD Lite model (No GPS option) added.
•Section 3.2, function of DE-9F pin 9 (Aux input) corrected and clari-
fied.
•Section 4.0, re-written to support the WinRIS program.
•Section 5.0, Table 5, step 4, values revised.
•Section 6.0, MIL Specifications limitations note added.
•Appendix 1, clarification of “Officer Requires Assistance” alarm
function added.
Version 1.32, October 2000
•Updated UHF units specifications:
-Table 3 "Carrier Modulation"
-Table 4 “Tests, Full & Half Channel Units”
-Section 6 “Specifications”.
Version 1.31, August 2000

120 20110-142 iv GeminiPD Installation Guide
•Introduction of 25.6 Kbps model. Relevant changes made to:
-Section 1.2.1 “Features”
-Table 3 “Carrier Modulation"
-Table 4 “Tests, Full & Half Channel Units”
-Section 6 “Specifications”.
-Emission designators table added to Section 6 “Specifications”.
Version 1.30, August 2000
•Power output specifications for 800MHz model added to section 1.2.1
“Features”.
•Main transceiver Output Power for 800MHz model added to:
Table 4 “Tests, Full and Half Channel Units” and minimum value edited
in the footnote.
•Title of section 4.4.4.2 edited to specify that RSSI Indicator also
serves as power meter. Note added to establish that the internal
wattmeter is not to be interpreted as a precision instrument.
•Section 4.4.4.3.1 “Unmodulated Carrier” edited to show 800MHz model
power check nominal forward wattage.
•Section 2.4.2 “Routing of Power Cable”, step no. 7, clarification of
negative wire connection.
Version 1.20, June 2000:
•LED indication explanation for the 800MHz (2% duty cycle limit) model
added as a footnote to table 1 and to section 5.3 GPS Test.
•Section 2.5 “Antenna” rewritten and now including more details con-
cerning “Planning” and has a new antenna spacing drawing.
•More details added to section 4.2 concerning starting of the WinRIS
program from MS-Windows.
•Environmental MIL spec added
•FCC Certification number added to Specifications section.
Version 1.10, March 2000:
Addition of 800MHz specifications, revision to paragraph 2.2.1 - RF Ra-
diation Warning and to paragraphs 2.5 through 2.5.3. – Antenna installa-
tion.
Version 1.0, January 2000:
First released version

120 20110-142 vGeminiPD Installation Guide

120 20110-142 vi GeminiPD Installation Guide
Definitions
The following terms are used throughout this document.
Item Definition
DCE Data Communications Equipment. This designation defines the direction (input or
output) of the various RS-232 interface signals. Modems are always wired as
DCE.
DTE Data Terminal Equipment. This designation defines the direction (input or output)
of the various RS-232 interface signals. Most user equipment, as well as PCs, are
wired as DTE.
GCU GeminiPD Control Unit board
GeminiPD High specs mobile radiomodem. PD = Parallel decode
GeminiPD Lite GeminiPD without GPS feature
HDX Half Duplex. A unit that uses separate transmit and receive frequencies, but
which may not transmit and receive simultaneously.
RS-232 Industry–standard interface for data transfer.
Simplex A unit which uses the same frequency for transmit and receive.
WinRIS Windows © Radio Installation Software. This software allows basic tests and unit
configuration.

120 20110-142 GeminiPD Installation Guide
1
1. PRODUCT OVERVIEW
This document provides the information re-
quired for the installation, operation and
verification of the DATARADIO GeminiPD
mobile radiomodem.
1.1 Intended Audience
This document is designed for use by engi-
neering design, installation, and maintenance
personnel.
1.2 General Description
GeminiPD is a mobile radiomodem aimed at
the public safety and public utility markets
to meet demand for high speed and high
throughput. It integrates all the necessary
hardware for data-only vehicular
installations up to but not including the
laptop PC and its application software.
Example of applications are:
1. Database inquiry systems.
Small number of brief messages, (usu-
ally from the mobile station) with fairly
long responses.
2. Computer-aided dispatch (CAD).
Large number of messages, (usually
from the base station) with very brief re-
sponses.
3. Automatic Vehicle Location (AVL).
Using built-in GPS receiver, determines
position, speed and direction of fleet
members.
The GeminiPD is made-up of a main
transceiver and an auxiliary receiver for
Parallel Decode (PD), a 40-Watt power
amplifier (35-Watt for 800 MHz model), a
GeminiPD Control Unit (GCU) with DSP
driven modem and an optional integrated
OEM GPS receiver. *
1.2.1 Features
•One-piece integrated design in a rugged
die-cast aluminum chassis.
•Parallel Decode (PD) technology (patent
pending) featuring dual receivers for
added decode sensitivity in multi-path
and fading environments.
•Sophisticated DSP-based modem design
provides added system performance,
fewer retries and more effective
throughput.
•Automatic channel changing for im-
proved roaming capabilities.
•Built–in, up to 16-channel flash –
EEPROM programmable synthesized
radio transceiver with automatic channel
selection.
•Models with on-air data speeds and
modulation types as follows:
-DGFSK* modulation, rates of 9600
to 19200 b/s in 12.5 or 25 kHz
channel spacing (9600 b/s maximum
in half channels).
or
-SRRC4FSK* modulation, rates of
25600 and 19200 b/s in 25 kHz or
16000 and 14400 b/s in 12.5 kHz
channel spacing.
•3 available user ports using standard
RS-232 interface via built-in multi-
plexer.
•Half-duplex or simplex operation.
•Out-of-band signaling enables transmis-
sion of GPS* reports with no effect on
system performance.
•Back-compatible with MobilPac/R
(DGFSK)* at 9600 and 19200 b/s.
1.2.2 Configuration
GeminiPD is factory configured based on
each customer network system requirements,
usually by Dataradio System Engineering.
Configuration is not changeable in the field
without notifying Dataradio.
* Networks must use common modulation, bit
and baud rates.
* The GeminiPD Lite model has no GPS.

120 20110-142 GeminiPD Installation Guide
2
1.3 Factory Technical
Support
The Technical Support departments of
DATARADIO provide customer assistance on
technical problems and serve as an interface
with factory repair facilities. They can be
reached in the following ways:
DATARADIO Inc.
5500 Royalmount Ave, suite 200
Town of Mount Royal
Quebec, Canada H4P 1H7
Technical support hours: Monday to Friday
9:00 AM to 5:00 PM, Eastern Time
phone: [phone]
fax: [phone]
Email address: [e-mail]
or
DATARADIO Corp.
6160 Peachtree Dunwoody RD., suite C-200
Atlanta, Georgia 30328
Technical support hours: Monday to Friday
8:30 AM to 5:30 PM, Eastern Time
phone: [phone]
fax: [phone]
Email address: [e-mail]
1.4 Product Warranty
Warranty information may be obtained by
contacting your sales representative.
1.5 Replacement Parts
This product is not field serviceable, except
by the replacement of a complete unit. Spe-
cialized equipment and training is required to
repair the GCU board and radio modules.
Contact Technical Support for service in-
formation before returning equipment. A
Technical Support representative may sug-
gest a solution eliminating the need to return
equipment.
1.5.1 Factory Repair
When returning equipment for repair, you
must request an RMA (Returned Material
Authorization) number. The Tech Support
representative will ask you several questions
to clearly identify the problem. Please give
the representative the name of a contact per-
son who is familiar with the problem, should
questions arise during servicing of the unit.
Customers are responsible for shipping
charges for returned units. Units in warranty
will be repaired free of charge unless there is
evidence of abuse or damage beyond the
terms of the warranty. Units out of warranty
will be subject to service charges. Informa-
tion about these charges is available from
Technical Support.
1.6 Unpacking
When ready for installation, carefully unpack
your GeminiPD kit (p/n 023 6000-001) ship-
ping carton and identify each item as listed
below:
•One GeminiPD
•Installation mounting bracket
•Power cable – 22 feet (6.7 meters)
•Small parts kit
If damage has occurred to the equipment
during shipment, file a claim with the carrier
immediately.

120 20110-142 GeminiPD Installation Guide
3
2. Installation
2.1 Planning the Installation
2.1.1 Overview
To ensure trouble-free, efficient installation,
start by inspecting the vehicle to determine
the optimum position for GeminiPD and its
antennas as well as the routing of all associ-
ated cabling and wiring.
2.1.2 Location
Often, installations in cars are done in the
trunk, underneath the back window ledge or
on the trunk floor. In vans and small trucks,
it is usually done in the back of the vehicle.
In large vehicles, it is often done in the front
cabin.
Be sure to place the GeminiPD unit in such a
way that:
•The LEDs can be seen (as an aid in
troubleshooting)
•Access to the antenna DE-9 connectors
is possible without removing the unit
•Sufficient air may flow around the unit
to provide adequate cooling
GeminiPD is not fully waterproof, therefore it
should be mounted sufficiently away from an
opened trunk lid or opened tailgate, windows
or doors to avoid exposure to rain and/or
snow. It also minimizes the chance that mate-
rial can be accidentally thrown on the unit or
of someone bumping against it.
2.1.3 Cable Path
Try to route the cables away from locations
where they would be exposed to heat (ex-
haust pipes, mufflers, tailpipes, etc.), battery
acid, sharp edges, mechanical damage or
where they would be a nuisance to automo-
bile mechanics, the driver or the passengers.
Keep wiring away from automotive com-
puter modules, other electronic modules and
ignition circuits to help prevent interference
between these components and radio equip-
ment.
Try using existing holes in firewall and trunk
wall and the channels above and below or
beneath the doors, channels through doors
and window columns that are convenient to
run cables and wires.
Whenever possible, install conduit in which
to run the cables.
2.2 Warnings
Before starting installation, review all of the
following warnings.
2.2.1 RF Radiation warning
The Federal Communications Commission
(FCC), with its action in the General Docket,
79-144, March 13, 1985, has adopted a
safety standard for the human exposure to
radio frequency electromagnetic energy
emitted by FCC-regulated equipment. Only
proper installation of the transceiver antenna
of GeminiPD as summarized in section 2.5
will result in user exposure substantially
below the FCC recommended limits.
Qualified personnel must do all antenna in-
stallations. See paragraph 2.5.2 for recom-
mended antenna positioning.
Transmissions when persons or animals out-
side the vehicle are within two feet of the
antenna may result in radio energy radiation
burns or related injuries.
2.2.2 Interference with vehicular
electronics
Certain vehicle electronic devices may be
prone to malfunction due to lack of protec-
tion from radio frequency energy present
when transmitting.
It includes, and is not limited to:
-Electronic fuel injection systems
-Electronic anti-skid braking systems
-Electronic cruise control systems

120 20110-142 GeminiPD Installation Guide
4
If the installation vehicle contains such
equipment, consult the dealer for the make
of vehicle and enlist his aid in determining if
such electronic circuits will perform nor-
mally when the radio is transmitting.
2.2.3 Secure mounting
For vehicle occupant(s) safety, mount Gem-
iniPD securely so that the unit will not break
loose in case of an accident or violent ma-
neuvers.
2.2.4 Explosive environments
Operation of vehicular radio transmitters in
explosive environments may be hazardous
and conventional safety precautions must
prevail. These include and are not limited to:
-Transmitting while fuelling the vehicle.
Do not carry fuel containers in the same
compartment as GeminiPD.
-Dynamite blasting caps may explode
when transmitting radio operation takes
place within 500 feet. Always obey the
“Turn Off Two-Way Radios” signs
posted at sites where dynamite is being
used.
If transporting blasting caps:
a) Carry the blasting caps in an appropriate
metal container having a soft cushioning
lining.
b) Suppress transmissions whenever the
blasting caps container is being loaded
or unloaded into or from the vehicle.
Check applicable local bylaws.
2.2.5 Installation in vehicles
powered by liquefied gas.
GeminiPD installations in vehicles powered
by liquefied petroleum gas with the LP-gas
container in the trunk or other sealed-off
space within the interior of the vehicle must
conform to the National Fire Protection As-
sociation Standard NFPA 58 which requires:
-Space containing radio equipment shall
be isolated by a seal from the space
containing the LP-gas container and its
fittings.
-Outside filling connections shall be used
for the LP-gas container.
The LP-gas container space shall be vented
to the outside of the vehicle.
2.3 Physical Unit
2.3.1 Recommended tools and
supplies
•Electric drill for mounting holes
•Hammer and center punch
•Tie-wraps
•Drills and circle cutters as needed ac-
cording the size of screws (or nuts and
bolts) used.
•In-line “Power meter” capable of meas-
uring forward and reflected power at the
operating frequency of the radio.
2.3.2 Physical mounting of
GeminiPD
Start by running all the cables (DC power,
PC RS-232 as well as all antennas cabling)
prior to mounting GeminiPD to assure the
feasibility of the planned cable routing. Be
sure to leave sufficient slack in each cable
so the GeminiPD may be removed from the
mounting bracket for servicing with the
power applied and the antenna attached.
GeminiPD is ready for installation.
Cautions:
•When drilling mounting
holes, be careful to avoid dam-
aging some vital part of the ve-
hicle such as fuel tanks, trans-
mission housing etc. Always
check how far the mounting
screws extend below the
mounting surface prior to in-
stallation.
•Use of drill bit stops is
highly recommended.
•After drilling, remove all
metal shavings before installing
screws.

120 20110-142 GeminiPD Installation Guide
5
•Do not overtighten self-
tapping screws.
1. Once you have found a suitable mount-
ing position for GeminiPD, hold the unit
and the unattached mounting bracket in
the proposed mounting position and
check that there is clearance behind the
unit for the heatsink, cables, etc. Check
that the position provides a large enough
flat surface that the bracket will not be
distorted when installed.
Figure 1 - Mounting plate and slot dimensions
2. Using the installation bracket as a tem-
plate, mark the four locations for drilling
(see Figure 1). Again, ensure that drilling
at the selected points is safe and will not
cause damage.
3. Indent the drilling positions with a center
punch.
4. Drill holes sized for the self-tapping
screws or for the nuts, bolts and lock
washers used.
Caution: Slightly reduce the size of the
drilled holes when using self-tapping
screws in thin metal.
Figure 2 - Bracket installation
5. Install the bracket without distorting.
6. Securely mount GeminiPD to the installed
bracket using the four supplied 8x40
black machine screws.
7. Drill any additional holes as required for
routing all cables and fit holes with
suitable grommets or bushings whenever
required.
2.4 Electrical installation
2.4.1 Electrical requirements
GeminiPD is designed to operate from a
13.8Vdc nominal car battery (negative
ground) and requires currents up to 15.0A. It
will tolerate a supply voltage range of 10.9
volts to 16.3 volts.
In vehicles with a 24 VDC electrical system
(mostly in trucks), it is essential to provide a
suitably rated 24/12 VDC converter to iso-
late the unit from the battery and protect it
against excessive voltage.
Warnings:
Application of more than 16.3 VDC
will damage GeminiPD and is not
covered by the warranty.
Always disconnect GeminiPD’s DC
power lead before connecting a
second battery, using power from
another vehicle or power boosting
(e.g. when “jump starting” the ve-
hicle).
2.4.2 Routing of power cable
1. Start by disconnecting the vehicle’s bat-
tery unless specifically prohibited from
doing so by the customer, vehicle manu-
facturer, agent or supplier.
Note:
In this event, exercise ex-
treme caution throughout
the installation and fit the
fuse only when the installa-
tion is complete.
2. The 22 feet (6.7 meters) long power ca-
ble consists of three wires attached to a
Packard Electric “Weather-Pack” con-
nector (DC power Connector).
2.5"
6.0"
1.0"
0.2"

120 20110-142 GeminiPD Installation Guide
6
The DC Power connector has:
•At position “A”, the smaller red
switch-sense wire (commonly to ignition)
•At position “B”, the blue ground wire
•At position “C”, a larger red B+ DC
power wire (MUST be unswitched)
Figure 3 - DC Power Connector
3. Place this connector at GeminiPD’s radio
power input location. Do not connect at
this time. See paragraph 2.6, “Complet-
ing the physical installation”.
4. Carefully route both the B and the C
wires to where the in-line fuse holder
will be installed, usually as close to the
vehicle’s battery as practicable. Ensure
that leads do not chafe on any metal
part(s). Secure the wires at several loca-
tions along their length.
Caution:
Use proper crimping tool.
Common pliers are NOT
acceptable.
Warning:
The DC Power lead must be
unswitched
5. Insert the negative (blue) lead into one of
the appropriate connector lug and crimp
solidly to force the metal contacts onto
the wires.
6. Repeat the step above for connecting the
red DC power lead.
7. Attach the positive lead at the battery
positive terminal. Attach the negative
wire at the vehicle end of the battery
ground cable.
If the negative cable is con-
nected directly to the battery
negative terminal, it should be
fused in case of failure of the
vehicle’s ground cable.
Ensure tight and secure connections.
8. Fasten the fuse holder and leads.
9. Carefully route the A wire to where the
connection will be made for switch
sensing.
•Connect to “Ignition” if you wish to
have GeminiPD turning ON and OFF
dependent on the vehicle’s ignition
key.
•Connect to “Accessory” if you wish
GeminiPD to be available when the
engine is not running, but still de-
pendent on the ignition key.
•Connect to a user-supplied control
switch.
•In installations equipped with a
“ChargeGuard”, connect to the con-
trolled-side of the ChargeGuard
(remembering that the DC Power
lead must NOT be switched).
10. Make appropriate connections.
Cautions:
Where scraping to bare metal was
required, and at the battery posts
where wire ends and lugs may be
exposed, apply anti-corrosion com-
pound.
Insert the fuse only when installa-
tion is complete and ready to test.
11. At the GeminiPD position, neatly coil
cable slack and attach securely.
A
B
C
IGNITION
(
Small red wire
)
GROUND
(Blue wire)
13.8VDC B+
(Fused Red wire) SEAL
(DO NOT REMOVE)

120 20110-142 GeminiPD Installation Guide
7
2.5 Antenna
To meet the FCC’s RF Exposure Guidelines,
the main transmitter antenna must be vehicle-
mounted to provide a separation distance of
50 cm or more from all persons and the an-
tenna gain must not exceed 5dB to satisfy
RF exposure requirements.
2.5.1 Recommended tools and
supplies
•circle cutter
•hole saw or
•socket punch for antenna
•Mini-UHF Crimp tool
2.5.2 Planning
Referring to Figure 4, GeminiPD commonly
uses three separate antennas:
•“T” - Main transceiver -
Constraints are Maximum Permissive
Exposure (“MPE” on the drawing) limits
of 50 cm (as per see section 2.5 above)
and omni-directional factors
•“R” - Auxiliary receiver –
Constraints are the receiver spacing of at
least 5/8 λ(wavelength) from trans-
ceiver antenna and omni-directional re-
quirements
•“G” - Global Positioning System (GPS)*
Constraints are TX spacing of at least
24-in/60.96 cm from all transmitting an-
tennas and a clear view of the sky.
For the optimum antenna spacing at the fre-
quency you are using, consult System Engi-
neering.
For installation of ground-plane dependent
antennas, the center of the metal surface
used for mounting is preferable for best
omni-directional pattern.
For ground-plane independent antennas, in-
stallation may be close to the edges of the
surface.
* The GeminiPD Lite model has no GPS.
Figure 4 - Antenna spacing
Install the antennas in one of the following
positions:
-Most preferred for all antennas: center-
line of roof. For transmitter antenna, it is
the ONLY acceptable position.
-Less preferred for receiver antenna:
trunk lid, providing distance to transmit-
ting antenna is respected whether lid is
opened or closed.
-Much less preferred, but permissible for
receiver antenna: left or right rear fend-
ers, just in back of rear window
-Least preferred, but permissible for re-
ceiver antenna: left or right front fenders,
ahead of windshield
Note: Proximity to other vehicle-mounted
antennas may cause mutual inter-
ference especially at higher fre-
quencies.
G
MPE
≥
≥≥
≥5/8λ
λλ
λ
(UHF: 18"/46cm
800MHz: 9
"
/23cm)
R
T
50cm
19.7in.
≥
≥≥
≥24in.

120 20110-142 GeminiPD Installation Guide
8
2.5.3 Antenna Installation
1. Route good quality 50-ohm coaxial ca-
bles (e.g. RG-223) from each of the se-
lected antenna positions to the position
where the GeminiPD unit is mounted.
2. Terminate the end at each of the antenna
positions with the appropriate connector
for the antenna used and make the con-
nection.
3. At the GeminiPD position, cut the three
cables to length and terminate with the
appropriate plug. For the transceiver and
the auxiliary cables, use a Mini-UHF
crimp plug using an appropriate crimping
tool. For the GPS, use a SMA connec-
tor.
4. Positively identify the transceiver mini-
UHF plug and connect to the left rear of
GeminiPD.
5. Positively identify the auxiliary receiver
mini-UHF plug and connect to the front
left of GeminiPD to the RX position.
6. Connect the SMA connector to the GPS*
position below the auxiliary connector
position.
7. Do not skip this last step, trust us; it is
an important one. To complete the in-
stallation, tie-wrap together the auxiliary
and the GPS* antenna cables at a point
about two inches in front of the unit. It
will be much easier hereafter to cor-
rectly identify which mini-UHF plug
goes where. You DO NOT want to cross
the auxiliary plug with the transceiver
plug.
2.6. Completing the
physical Installation.
To complete the physical installation and
prior to testing GeminiPD:
•Connect DC Power cable’s connector to
GeminiPD’s until you hear a click as the
two parts snap together.
•Re-check that all other connections are
secure (antennas, PC, etc.)
•Switch vehicle ignition ON.
You are now ready to check for normal op-
eration and to run the Radio Installation
Software (WinRIS) program for testing or
trouble-shooting.
2.7. Checking out Normal
operation
Check that the vehicle ignition is ON.
1. Check for proper operation of the
GeminiPD’s LEDs as per Table 1 in sec-
tion 3.1
2. Using the WinRIS program (described in
section 4) and an in-line wattmeter,
check forward & reverse power to con-
firm main antenna installation.
3. Using the WinRIS, check the RF link
with a base station that can be heard by
using the WinRIS “Ping” feature (see
paragraph 4.4.4.4).
or
If user application and its base station
are available, test the installation by
going through a normal sequence of
transmitting and receiving messages.
* The GeminiPD Lite model has no GPS.

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3. Operating Description
3.1 Front & Rear Panels
The front panel includes:
•One mini-UHF type female antenna connector for the auxiliary receiver
•One SMA type female connector for the GPS receiver (not installed on GeminiPD Lite model)
•Two LED indicators
•Three DE-9F RS232 ports
The rear panel includes:
•One mini-UHF type female antenna connector for the main transceiver
•One 3-pin pigtailed DC Power connector with ignition sense
Figure 5 - Front and rear panels
®
RX TXPWR PGM PC/SETUP
DEV-1DEV-2DEV-3
RX
GPS
Gemini/PD
6.000"
2.000"

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Table 1 - GeminiPD LEDs indications
GeminiPD LEDs indications
Power-on Sequence (LEDs are paired) Normal Operation (LEDs are independent)
PWR RX / TX Indication PWR Indication RX / TX Indication
Red Red Normalboot-up start
(10 to 27 sec.) Green* Normal readystate Off No network activity
Amber Off Then 8 seconds to
completing boot-up
Normal
Green Off Normal state Amber* 1 Pulse/sec.
Sufficient satellites
acquired byGPS Green Receiving packets
“DBA sync” allows transmit
Red Off Hardware failure Amber Receiving packets “DBA out-of-sync” prevents
transmit
Errors
Slow
Red/Green Red Software failure (firmware erased) Red Transmitting
Special
Fast
Red/Green Red Programming in progress
* For 800MHz model (using 25% dutycycle limit)
PWR lit Green / Flashing Amber = normal indication(GPS 1pulse per sec.)
PWRlitAmber/ Flashing Green = exceeded dutycycle (GPS 1pps)
3.2 DTE Port Interface
For all three ports:
DE-9 F
pin # Function
1DCD – from GeminiPD, normally asserted
2 RXD – data from GeminiPD
3 TXD – data to GeminiPD
4 DTR – to GeminiPD, handshaking
5 Ground
6 DSR – from GeminiPD, tied to VCC
through current limiting resistor
7 RTS - to GeminiPD, handshaking
8 CTS – from GeminiPD, handshaking
9 AUX - auxiliary input to GeminiPD,
(for port 2: “Officer requires assistance”
Alarm input)
It may be activated by (normally open) dry
contact pull-up to the port’s DSR output. It
may also tolerate user pull-up to external
+12 VDC (car battery), but an isolated dry
contact is preferred due to the risk of
noise-related false alarms caused by the
vehicle’s electrical system.
A +3 to +12 V signal at this pin will send a
DMP “x” (On) message to the base.
An open or ground signal will send a DMP
“y” (Off) message.
Messages are only sent when a signal
transition occurs.
See Appendix “A” on page 24 for further
details.
We recommend the use of a shielded 9-wire ca-
ble with all pins connected. These ports can be
used for unit configuration, maintenance & ad-
justment as well to connect user applications.
3.2.1 RS-232 Interface Signal Levels
In the descriptions of data signals, the following
conventions are used:
Table 2 - RS-232 Signal Levels
Term Alternates Signal level
1 asserted, spacing +3 to +15 V
OFF dropped, marking -3 to -15 V

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4. WinRIS program
The Windows Radio Installation Software
(WinRIS) program is used to:
•Check and troubleshoot GeminiPD.
•Save an existing configuration.
•Upload files for field-configuring units (Re-
quires intervention with technical support).
To run the program, you will need:
A PC or portable computer running a 32-bit MS-
Windows application:
Win ME
Win2000
Win NT
Win 9x
Note:
WinRIS does not operate under:
Win CE (embedded in PocketPC)
16-bit Windows 3.x
-
-A hard disk.
-An available COM port.
-A serial mouse, with its own driver installed
is strongly recommend however most actions
can also be done using keyboard command
4.1 Operation
This support program can be run in MS-
Windows © mode.
DO NOT have more than one copy of this pro-
gram loaded at any given time in separate win-
dows. Doing so creates COM port sharing con-
flicts and failure to run the program alone results
in unexpected transmissions.
Only left mouse button operation is supported.
Any command or selection shown in gray is ei-
ther unavailable or is awaiting another action
before activating.
Help in the program is available at all points by
pressing the F1 key. If a subject is highlighted,
the help displayed will be context sensitive.
4.2 To connect and start
WinRIS
Connect a suitable 9-conductor straight RS-232
cable, between the unit’s front-mounted
PC/Setup port and the RS-232 port of the PC or
portable computer that will be running Gem-
ini.exe program.
GeminiPD’s WinRIS program is available on
diskette, Dataradio p/n 980 03392-00n.
Refer to the WinRIS Readme.txt
file for details on how to set
MS-Windows environment, con-
nect, install and run this pro-
gram.
In summary, before starting the WinRIS when
running MS-Windows, click on “Start”, then on
"Run". Type the relevant path and variables on
the command line (or select by browsing) leading
to:
WinRIS.EXE COM[x], [speed],8,n,1
(where x is the PC COM port to be used) Of
course, the executable command may be used
alone without any variable added.
Click on “OK”.
It is also possible to create a PC desktop short-
cut icon for WinRIS:
•Start by right clicking anywhere on the
desktop,
•Select New,
•Select Shortcut and type the path as detailed
above directly on the command line (with or
without variables).
•Click Next,
•Type in an applicable name for the shortcut
icon,
•Click Next
•Select an icon (your choice) and
•Click on Finish.
Command line settings override the environment
variable, if any.

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Figure 6 - WinRIS window
4.3 Window
This program uses one main display screen only.
Placing the cursor over a Toolbar or Button gen-
erates a ScreenTip. Referring to Figure 6, start-
ing from top and moving down to the bottom, the
screen display is made up of:
•A Menu bar, containing the menu names
listed below. They give access to command
options. Unavailable commands are shown in
light gray color. Shortcut keys are listed
whenever available.
!File menu lists the:
-Put From command (Ctrl+O)
-Get command (Ctrl+S)
-Get As command
and below a command separator, the:
-Exit command
!Test menu lists the:
-Modulated command
-UnModulated command
!View menu lists the:
-Toolbar checked command
-Status bar checked command
!Help menu lists the:
-Help Topics command
and below a command separator, the:
-About WinRIS command
•A Toolbar row, located immediately below
the menu bar containing buttons (each bear-
ing an icon) for commonly used tasks as
follows:
!Put From button
!Get button
Get As button

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and to the right of a bar separator, the:
!About button and the
!Context-sensitive Help button
•An Indicator and Button bar, located im-
mediately below the Toolbar row, it contains
two circular indicators
!DSR signal is High indicator
!CTS signal is High indicator
and three buttons for commonly used tasks as
follows.
!Station Reset button
!Modulated TXON button
!Unmodulated TXON button
•AProduct field, displays product type be-
ing used after a connection to the product
has been established
•A Data section, containing the Banner plus
the Comments and Password fields and their
related Put buttons.
•A Channel(s) section, to select and activate
a channel.
•A Test section, with a Ping button and the
relevant address field.
•A Status bar, for displaying standard user-
messages. Other messages appear in dialog
window boxes or warning windows.
4.4 Functions
The WinRIS program is used to:
•Save an existing configuration from a unit to
a file.
•Take a configuration from a file and upload
it to a unit
•Check GeminiPD
•Test and/or trouble-shoot installations
4.4.1 “Station Reset” button
The Station Reset button is the only button
available when first starting the program and is
used to initiate the connection process.
•Press Station Reset.
•Enter Port and Baud rate information in the
Select Port sub-window.
Figure 7 - Select Port window
•Press OK to validate the selection (or Can-
cel to exit back to the main screen).
•All test buttons and fields are now activated.
The Station Reset button is also pressed as a last
step after doing a “Put From”. The Station Reset
button causes downloaded parameters from a file
or diskette to take effect in the connected unit.
Pressing Station Reset is not required after doing
any Comments or Password configuration change
as these have their own Put Comments and Put
Password buttons.
Station Reset does not break the connection.
4.4.2 Configuration to a file
Saving the unit’s configuration to a file allows
the user to:
•Subsequently restore the configuration.
•Safeguard a copy as documentation of the
configuration.
Note: The configuration and status files are
ASCII files and may be e-mailed or faxed to
technical support when requested to do so.
Warning:
Do not make any changes to these files. Any
changes made to the configurations MUST be
done at factory or by Dataradio system
engineering.
4.4.2.1 “Get” button
On the menu bar, select “File”, then the “Get”
command or press the “Get” button on the Tool-
bar to:
•Establish linking