Aeroflex GPS-101-2 User manual

Global Positioning Simulator
Operation Manual
1002-1004 -200
Issue-4
GPS-101-2
EXPORT CONTROL WARNING: This document contains controlled
technology or technical data under the jurisdiction of the Export
Administration Regulations (EAR), 15 CFR 730-774. It cannot be
transferred to any foreign third party without the specific prior
approval of the U.S. Department of Commerce Bureau of Industry and
Security BIS). Violations of these regulations are punishable by fine,
imprisonment, or both.
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OPERATION MANUAL
GLOBAL POSITIONING SIMULATOR
GPS-101-2
PUBLISHED BY
Aeroflex
COPYRIGHT ©Aeroflex 2009
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or
transmitted in any form or by any means, electronic, mechanical, photocopying, recording or
otherwise without the prior permission of the publisher.
Original Printing: Feb 1/97
Issue-2 Aug 1/03
Issue-3 Aug 1/04
Issue-3 Feb 1/09
10200 West York / Wichita, Kansas 67215 U.S.A. / [phone] / FAX [phone]

OPERATION MANUAL
GPS-101-2
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Electromagnetic Compatibility:
For continued EMC compliance, a double shielded and properly terminated external interface cable
must be used with this equipment when interfacing with the COMM 1, COMM-2 and AUX I/O
Connectors.
For continued EMC compliance, all external cables must be shielded and 3 meters or less in
length.
Nomenclature Statement:
In this manual the GPS-101, GPS-101 Test Set, Unit, Test Set, Global Positioning Simulator or
GPS-101 Global Positioning Simulator refers to the GPS-101-2 Global Positioning Simulator.

OPERATION MANUAL
GPS-101-2
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OPERATION MANUAL
GPS-101-2
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SAFETY FIRST: TO ALL OPERATIONS PERSONNEL
REFER ALL SERVICING OF UNIT TO QUALIFIED TECHNICAL PERSONNEL. THIS UNIT CONTAINS NO
OPERATOR SERVICEABLE PARTS.
WARNING: USING THIS EQUIPMENT IN A MANNER NOT SPECIFIED BY THE ACCOMPANYING
DOCUMENTATION MAY IMPAIR THE SAFETY PROTECTION PROVIDED BY THE EQUIPMENT.
CASE, COVER OR PANEL REMOVAL
Removing the Chassis Assembly from the Case Assembly exposes the operator to electrical hazards that
can result in electrical shock or equipment damage. Do not operate this Test Set with the Chassis Assembly
removed from the Case Assembly.
SAFETY IDENTIFICATION IN TECHNICAL MANUAL
This manual uses the following terms to draw attention to possible safety hazards, that may exist when
operating this equipment.
CAUTION: THIS TERM IDENTIFIES CONDITIONS OR ACTIVITIES THAT, IF IGNORED, CAN RESULT IN
EQUIPMENT OR PROPERTY DAMAGE (E.G., FIRE).
WARNING: THIS TERM IDENTIFIES CONDITIONS OR ACTIVITIES THAT, IF IGNORED, CAN RESULT IN
PERSONAL INJURY OR DEATH.
SAFETY SYMBOLS IN MANUALS AND ON UNITS
CAUTION: Refer to accompanying documents. (This symbol refers to specific CAUTIONS
represented on the unit and clarified in the text.)
AC OR DC TERMINAL: Terminal that may supply or be supplied with AC or DC voltage.
DC TERMINAL: Terminal that may supply or be supplied with DC voltage.
AC TERMINAL: Terminal that may supply or be supplied with AC or alternating voltage.
SWITCH ON/OFF (Push-Push): Power to the device is connected ON or disconnected OFF.
EQUIPMENT GROUNDING PRECAUTION
Improper grounding of equipment can result in electrical shock.
USE OF PROBES
Check specifications for the maximum voltage, current and power ratings of any connector on the Test Set
before connecting it with a probe from a terminal device. Be sure the terminal device performs within these
specifications before using it for measurement, to prevent electrical shock or damage to the equipment.
POWER CORDS
Power cords must not be frayed, broken nor expose bare wiring when operating this equipment.
USE RECOMMENDED FUSES ONLY
Use only fuses specifically recommended for the equipment at the specified current and voltage ratings.
INTERNAL BATTERY
This unit contains a Sealed-Lead Battery, serviceable only by a qualified technician.
CAUTION: SIGNAL GENERATORS CAN BE A SOURCE OF ELECTROMAGNETIC INTERFERENCE (EMI) TO
COMMUNICATION RECEIVERS. SOME TRANSMITTED SIGNALS CAN CAUSE DISRUPTION
AND INTERFERENCE TO COMMUNICATION SERVICES OUT TO A DISTANCE OF SEVERAL
MILES. USERS OF THIS EQUIPMENT SHOULD SCRUTINIZE ANY OPERATION THAT RESULTS
IN RADIATION OF A SIGNAL (DIRECTLY OR INDIRECTLY) AND SHOULD TAKE NECESSARY
PRECAUTIONS TO AVOID POTENTIAL COMMUNICATION INTERFERENCE PROBLEMS.

OPERATION MANUAL
GPS-101-2
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OPERATION MANUAL
GPS-101-2
TABLE OF CONTENTS
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TABLE OF CONTENTS
TITLE CHAPTER/SECTION
Title Page
Copyright Page
Statements
Safety Page
List of Effective Pages
Table of Contents
Introduction
Chapter 1
Section 1 - Description 1-1
Section 2 - Operation 1-2
Section 3 - Specifications 1-3
Section 4 - Shipping 1-4
Section 5 - Storage 1-5
Appendix A - I/O Connectors and Pin-Out Tables
Appendix B - NAV Data and Almanac Information
Appendix C - Auxiliary Equipment
Appendix D - Metric/British Imperial Conversion Table with Nautical Distance Conversions
Appendix E - Abbreviations
Index
Battery/Voltage Instructions

OPERATION MANUAL
GPS-101-2
TABLE OF CONTENTS
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OPERATION MANUAL
GPS-101-2
INTRODUCTION
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INTRODUCTION - GPS-101-2 GLOBAL POSITIONING SIMULATOR
This manual contains operating instructions for testing GPS receivers. It is strongly recommended
that personnel be thoroughly familiar with the contents of this manual before attempting to operate
this equipment.
Refer all servicing of the GPS-101-2 Test Set to qualified technical personnel.
ORGANIZATION
This manual is divided into five sections as follows:
CHAPTER 1 - OPERATION
Section 1 - DESCRIPTION (general description and functional capabilities)
Section 2 - OPERATION (installation; controls, connectors and indicators; performance
evaluation; operation, remote operation)
Section 3 - SPECIFICATIONS
Section 4 - SHIPPING
Section 5 - STORAGE

OPERATION MANUAL
GPS-101-2
INTRODUCTION
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OPERATION MANUAL
GPS-101-2
1-TABLE OF CONTENTS
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CHAPTER ONE
GPS-101-2 TEST SYSTEM
OPERATION MANUAL
TABLE OF CONTENTS
TITLE CHAPTER/SECTION/SUBJECT PAGE
SECTION 1 - DESCRIPTION 1-1
1. General Description and Capabilities 1-1-1 1
1.1 General 1-1-1 1
1.2 System Operation 1-1-1 1
1.3 Functional Capabilities 1-1-1 1
SECTION 2 - OPERATION 1-2
1. Installation 1-2-1 1
1.1 Power 1-2-1 1
1.2 Safety Precautions 1-2-1 1
1.3 AC Power Requirements 1-2-1 2
1.4 Battery Charging 1-2-1 2
1.5 Display Control 1-2-1 2
1.6 Menu Settings 1-2-1 2
1.7 Almanac Warning 1-2-1 2
1.8 Setting Date and Time 1-2-1 3
1.9 Operation Interface 1-2-1 4
1.10 External Cleaning 1-2-1 5
2. Controls, Connectors and Indicators 1-2-2 1
2.1 Front Panel 1-2-2 1
2.2 Rear Panel 1-2-2 2
3. Performance Evaluation 1-2-3 1
4. Operation 1-2-4 1
4.1 Main Menu 1-2-2 1
4.2 External Input Operation 1-2-3 3
4.3 Information Screens 1-2-4 6
5. Remote Operation 1-2-5 1
SECTION 3 - SPECIFICATIONS 1-3
SECTION 4 - SHIPPING 1-4
1. Shipping Test Sets 1-4-1 1
1.1 Information 1-4-1 1
1.2 Repacking Procedure 1-4-1 1
SECTION 5 - STORAGE 1-5
1. Storing Test Sets 1-5-1 1

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GPS-101-2
1-TABLE OF CONTENTS
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OPERATION MANUAL
GPS-101-2
1-LIST OF ILLUSTRATIONS/TABLES
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LIST OF ILLUSTRATIONS
TITLE CHAPTER/SECTION/SUBJECT PAGE
Direct Connect Testing 1-2-1 4
Antenna Testing 1-2-1 4
GPS-101-2 Front Panel 1-2-2 1
GPS-101-2 Rear Panel 1-2-2 2
Modulation Input 1-2-4 5
Repacking Procedure 1-4-1 2
LIST OF TABLES
TITLE CHAPTER/SECTION/SUBJECT PAGE
Specified Fuse Ratings 1-2-1 2
Remote Commands 1-2-5 1

OPERATION MANUAL
GPS-101-2
1-LIST OF ILLUSTRATIONS/TABLES
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OPERATION MANUAL
GPS-101-2
1-1-1
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SECTION 1 - DESCRIPTION
1. GENERAL DESCRIPTION AND CAPABILITIES
1.1 GENERAL
The GPS-101-2 Global Positioning Simulator
provides for installation and functional bench
testing of global positioning system (GPS)
receivers.
The GPS-101-2 simulates one of many specific
global positioning satellites. Selected specific
satellite vehicle (SV) signals transmitted with
selected navigation (NAV) data test patterns
are used to verify the operational integrity of
GPS receivers.
1.2 SYSTEM OPERATION
Most GPS receivers operate by receiving the
coarse acquisition (C/A) encoded signals on
the L1 (1575.42 MHz) channel. The receiver
uses the C/A encoded signal to calculate the
distance from each specific satellite.
The combined 50 Hz NAV data and C/A
encoded satellite signals contain satellite
position and information accuracy. The full
navigation message contains 25 data frames,
each having 1500 bits of information and
includes an almanac for the receiver data
base. The full navigation message takes about
12.5 minutes to transmit.
The almanac data base in the GPS receiver
maintains position information on all the
satellites for any given time. From the last
acquired position and using the almanac data
base, the GPS receiver selects three (two
dimensional positioning) or four (three
dimensional positioning) of the best satellites
known to be in view at the current time. After
the receiver starts tracking the three or four
selected satellites, position is calculated using
the received information.
1.3 FUNCTIONAL CAPABILITIES
The GPS-101-2 has the following functional
capabilities:
●Generates GPS signals on the L1 channel
(1575.42 MHz) frequency.
●Provides adjustable RF output level from
-85 to -145 dBm in 1 dB steps (to verify
system and/or receiver sensitivity).
●Offsets Doppler frequency as selected (no
shift, -4 or +4 kHz).
●Simulates one of 32 global positioning
satellites or one of five ground stations by
transmitting the selected phase modulated
C/A code (Gold Code) signal identifying the
particular satellite or ground station.
●Provides selectable preset 50 Hz NAV data
test patterns.
●Allows uploading and downloading of
almanac data. Refer to Appendix B.
●Provides adjustable date and time. (The
GPS-101-2 has the current date and time
[UTC] loaded initially at the factory.)
●Operates on battery power for
approximately six hours.

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OPERATION MANUAL
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SECTION 2 - OPERATION
1. INSTALLATION
1.1 POWER
The GPS-101-2 is powered by an internal
battery. The battery charging circuit enables
the operator to recharge the battery anytime
the unit is connected to ac power. The
GPS-101-2 can operate continuously on ac
power for servicing and/or bench tests.
The internal battery is equipped to power the
GPS-101-2 for six to eight continuous hours of
use. When the battery needs recharging, the
ON Indicator illuminates red.
The GPS-101-2 conserves battery power with
the Battery Saver function. The Battery Saver
function shuts off the GPS-101-2 after
15 minutes without key or control activity when
operating on battery power.
Battery Saver Function:
STEP PROCEDURE
1. Press PWR Key to activate GPS-101-2
(ON Indicator illuminates).
2. Press SETUP Key. Continue pressing
SETUP Key, as needed, to display
System Setup Menu.
Setup: System
3. Press SELECT Key to enter Battery
Saver Submenu field.
Setup: System
Battsaver: Yes
4. Turn SLEW/STEP Control to select Yes
to activate Battery Saver function or No
to deactivate Battery Saver function.
1.2 SAFETY PRECAUTIONS
Two important safety precautions must be
observed during installation and operation.
Aeroflex assumes no liability for failure of
customer to comply with the safety precautions
outlined in this manual:
●Installation/operating personnel should not
attempt to install or operate the GPS-101-2
without first reading and complying with the
instructions contained in this manual. All
procedures contained in this manual must
be performed in exact sequence and
manner described.
●The ac power cable is equipped with a
standard three-prong plug and must be
connected to a properly grounded three-
prong receptacle.
WARNING: DO NOT USE A THREE-
PRONG TO TWO-PRONG
ADAPTOR PLUG. DOING SO
CREATES A SHOCK
HAZARD BETWEEN THE
CHASSIS AND ELECTRICAL
GROUND.
●Due to potential for electrical shock within
the Test Set, the Case Assembly must be
closed when the Test Set is connected to
an external power source.
●Battery replacement and internal
adjustments must only be performed by
qualified service technicians.

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1.3 AC POWER REQUIREMENTS
The GPS-101-2 operates over a voltage range
of 100 to 120 VAC at 60 Hz or 220 to 240 VAC
at 50 Hz, according to the internal Line Supply
Voltage Select Switch setting (only serviceable
by a qualified technician). Refer to
Battery/Voltage Instructions. The specified
fuse ratings are listed in 1-2-1, Table 1.
CAUTION: FOR CONTINUOUS
PROTECTION AGAINST FIRE,
REPLACE ONLY WITH FUSES
OF THE SPECIFIED VOLTAGE
AND CURRENT RATINGS.
INPUT VOLTAGE F1 AND F2 FUSES
100 to 120 VAC 1.0 A, 250 V
Fast Blo (Type F)
(Aeroflex: 5106-4501-000)
(Bussman: AGC1)
220 to 240 VAC 0.5 A, 250 V
Fast Blo (Type F)
(Aeroflex: 5106-0000-016)
(Bussman: AGC1/2)
Specified Fuse Ratings
Table 1
1.4 BATTERY CHARGING
The battery charger operates whenever ac
power is applied to the Test Set. When
charging, the battery reaches a full charge in
approximately half the discharge time
(≈4 hours from a full discharge). The CHARGE
Indicator illuminates red when operating in
maximum charge mode (battery at <80%). The
CHARGE Indicator illuminates green when
operating in trickle charge mode (battery at
≥80%).
The battery should be charged every three
months (minimum) or disconnected (only by a
qualified technician) for long term inactive
storage periods of more than six months.
Charging Battery:
STEP PROCEDURE
1. Verify GPS-101-2 is OFF.
2. Connect supplied ac power cable to AC
INPUT Connector. (CHARGE Indicator
illuminates.)
3. Allow four to six hours for full battery
charge or until CHARGE Indicator
illuminates green.
NOTE: The GPS-101-2 can be used
while charging the battery.
1.5 DISPLAY CONTROL
Because of varying preferences and
environmental considerations, the GPS-101-2
provides back light and contrast controls for
the LCD:
●Press BACK LT Key to set LCD back light
On or Off. (Off increases battery run time.)
●Press CONTRAST Key to decrease
contrast (makes characters lighter on
display).
●Press CONTRAST Key to increase
contrast (makes characters darker on
display).
1.6 MENU SETTINGS
The GPS-101-2 saves current settings for all
data fields, except date and time, when
powered down. Date and time fields are
continually updated by the internal real time
clock (RTC) and changes are only saved by
the user. Refer to para 1-2-1.8. On power up,
the GPS-101-2 restores the saved settings for
all Menu fields. The GPS-101-2 also returns to
the last screen used before the previous power
down.
1.7 ALMANAC WARNING
The GPS-101-2 displays alternating warning
screens when the internal almanac might be
out of date:
WARNING: Almanac
May Be Expired
Contact IFR at
1-800-835-2350
CAUTION: USING THE GPS-101-2 WITH AN
OUTDATED ALMANAC MAY
CAUSE THE GPS RECEIVER TO
FAIL MOMENTARILY IN
LOCATING SATELLITES OR
SHOW SYMPTOMS OF
PRODUCT FAILURE.
Refer to Appendix B when the almanac warning
appears.

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1.8 SETTING DATE AND TIME
The GPS-101-2 provides two different times
and dates, real time and current session time.
When received from the factory, the GPS-101-
2 has the current Coordinated Universal Date
and Time (UTC) loaded as the internal real
time clock (RTC) reference. Upon power up,
the internal real time clock (RTC) accurately
updates the current date and time from the
RTC reference. Some GPS receivers may
require local time or other time zones for
testing. The user can adjust the current
session time without changing the RTC
reference.
Date Function:
NOTE: Steps 1 through 8 provide date
settings for current session only.
Steps 9 and 10 store date settings as
new RTC reference.
STEP PROCEDURE
1. Press PWR Key to activate GPS-101-2
(ON Indicator illuminates).
2. Press SETUP Key. Continue pressing
SETUP Key, as needed, to display Date
Setup Menu.
Setup: Date
3. Press SELECT Key to enter Month
Submenu field.
Setup: Date
Mar 3 2008 MON
4. Use SLEW/STEP Control to set month
(Jan to Dec).
5. Press SELECT Key to enter Date
Submenu field.
6. Turn SLEW/STEP Control to set date
(1 to 28, 29, 30 or 31; depending on
month).
7. Press SELECT Key to enter Year
Submenu field.
STEP PROCEDURE
8. Turn SLEW/STEP Control to set year
(1980 to 2050). (The weekday
automatically adjusts to new settings.)
9. Press SELECT Key to enter Date Set
Submenu field.
Setup: Date
Set: Use Spinner
10. Turn SLEW/STEP Control (Spinner) to
save current date settings.

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Time Function:
NOTE: Steps 1 through 8 provide time
settings for current session only.
Steps 9 and 10 store time settings as
new RTC reference.
STEP PROCEDURE
1. Press PWR Key to activate GPS-101-2
(ON Indicator illuminates).
2. Press SETUP Key. Continue pressing
SETUP Key, as needed, to display Time
Setup Menu.
Setup: Time
3. Press SELECT Key to enter Hour
Submenu field.
Setup: Time
11:06:37 (UTC)
4. Use SLEW/STEP Control to set hour
(00 to 23).
5. Press SELECT Key to enter Minute
Submenu field.
6. Turn SLEW/STEP Control to set minute
(00 to 59).
7. Press SELECT Key to enter Second
Submenu field.
8. Turn SLEW/STEP Control to set second
(00 to 59).
9. Press SELECT Key to enter Time Set
Submenu field.
Setup: Time
Set: Use Spinner
10. Turn SLEW/STEP Control (Spinner) to
store current time settings as new
internal RTC reference.
1.9 OPERATION INTERFACE
There are no special connections or
requirements to interface the GPS-101-2 with
the GPS receiver to be tested.
NOTE: The GPS receiver is also referred to
as the Unit Under Test (UUT).
Direct Connection
Refer to 1-2-1, Figure 1.
●Use RF cable to connect RF OUT
Connector to UUT Receive Connector.
●Conduct GPS Receiver Test Operation
according to 1-2-4.
UUT
01007006
Direct Connect Testing
Figure 1
Antenna Coupler Connection
Refer to 1-2-1, Figure 2.
●Use RF cable to connect RF OUT
Connector to Antenna Coupler Connector.
●Cover UUT Antenna with Antenna Coupler.
ANTENNA COUPLER
UUT ANTENNA
01007007
Antenna Testing
Figure 2