Avionics
GPS-101 GPS Satellite Simulator
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• Verify operational integrity of GPS
receivers quickly
• Selectable Satellite Vehicle (SV) and
Navigation (NAV) Data
• Adjustable RF levels from -85 dBm to
-145 dBm in 1 dB steps
• Doppler control allows the operator to
select a positive or negative carrier frequency shift of approximately 4 kHz
• Stored GPS Almanac with real time clock
• Direct connect to receiver or via antenna
coupler
• Battery operated portability
Aeroflex is a leader in the design, manufacture
and marketing of Avionics test systems.
The IFR GPS-101 Global Positioning Simulator
provides accurate and repeatable testing of
Global Positioning Satellite (GPS) receivers. The
GPS-101 achieves this testing capability by simulating a Global Positioning Satellite and generating a specific Satellite Vehicle (SV) and
Navigation (NAV) data pattern. Coupled with
remotely loaded GPS almanac information and
RF levels/frequency control, the GPS-101 provides a portable test solution for verifying the
operational integrity of GPS systems.
The GPS-101 verifies the operational integrity of:
• An integrated GPS receiver - antenna system (e.g. a hand
held unit) with built-in test modes accessible by transmitting special satellite (SV) numbers and navigational (NAV)
data word that will cause an indication or received signal
strength.
• An installed GPS receiver with remote antenna system.
• Any GPS receiver or installation capable of indicating that
a single satellite with appropriate navigation data was
detected.
Operation
The GPS-101 provides dedicated front panel keys for all primary
functions. Selected parameters are displayed on a wide viewing
angle, high contrast, backlit LCD display.
MODE KEYS
RF LVL
The RF level can be adjusted from -85 to -145 dBm in 1 dB steps via
slew wheel control to verify GPS.
DPLR
The doppler control allows the operator to select a positive or negative carrier frequency shift of approximately 4 kHz to verify receiver
acquisition and lock performance.
SV
Selects the satellite vehicle to be simulated (1 through 37). The
almanac data is utilized to display an asterisk alongside the selected
satellite vehicle if the satellite is unhealthy or not available.
RF CONT
The RF control selects the modulating source for the 1575.42 MHz
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generator. The selections are RFOFF: turns carrier off, RFCW:
unmodulated carrier, RFON: C/A code and NAV data (spread spectrum signal), RFEXT: external BPSK modulation through AUX I/O
connector and RFSQR: 511.5 kHz square wave modulation (maintenance purposes).
SETUP:
Provides access to menus for setting RS-232/422 communications
port parameters, test set operational characteristics and self test.
TEST:
Selects one of three stored NAV data patterns. (Three data patterns
reserved for future use)
1. T1: NAV data that contains programmable almanac information
and GPS week and time of week fields. The almanac data is valid
for a 30 day period and may be downloaded in ‘YUMA’ ASCII text
format via the RS-232 port. Current almanac data is available from
the U.S. Coastguard Internet Web Site. The GPS-101 has an internal real time clock that keeps UTC time and is programmable by
the user.
2. T2: NAV data pattern that contains fixed GPS week and time of
week.
3. T3: Fixed 11001100.. repeating test pattern.
Select Keys: Moves cursor to selected field/parameter.
Display Keys: Contrast setting keys and display backlight on/off key.
ESC Key: Returns to main operation screen.
Slew Wheel: Allows rapid data slewing.
SSPPEECCIIFFIICCAATTIIOONN
GGEENNEERRAATTOORR
Frequency
1575.42 MHz
Accuracy
Same as Master Timebase
Doppler
Selectable frequency offset ±4.0 kHz
Offset Accuracy
See Master Oscillator
Channels
Single SV simulation, selectable from 1 to 37
Phase Modulation
BPSK
PRN Code
C/A code = 1.023 MHz, 1023 bit gold code
NAV Data
50 Hz, Programmable test pattern, built-in patterns
Output Level
-85 to -145 dBm in 1 dB steps, ±2 dB accuracy into 50 Ω (AC
Coupled) Standard Cable, 4 dB loss
Spurious
<-40 dBc over the bandwidth (20 MHz)
External Modulation Input
TTL
MMAASSTTEERR OOSSCCIILLLLAATTOORR
Standard Timebase
Frequency
10 MHz nominal (see note)
Temperature Stability
±1 ppm
Ageing Rate
±1 ppm/yr, ±5 ppm/10 yr
Uncertainty
±1 ppm
Option Timebase
Frequency
10 MHz nominal (see note)
Temperature Stability
±0.1 ppm
Ageing Rate
±0.1 ppm/yr
Uncertainty
±0.1 ppm
Note: Internal timebase frequency is a function of timebase calibration, ageing
rate, temperature stability and uncertainty.
External Reference Input
Input Level
0.25 to 6.0 Vp-p
Input Impedance
150 Ω nominal
Input Frequency
10.0 MHz
External Reference Output
Output Level
1.5 Vp-p nominal into 50 Ω
Output Frequency
10.0 MHz nominal
CCOOUUPPLLEERR
Coupling
-20 dB typical at 1575.42 MHz
Assumes
4.77 dB patch antenna gain and 4 dB cable loss
Isolation
>25 dB at 1575.42 MHz
>30 dB typical at 1575.42 MHz
VVEERRSSIIOONNSS AANNDD AACCCCEESSSSOORRIIEESS
When ordering please quote the full ordering number information.
GGEENNEERRAALL
Calibration Interval
1 year
AC Input
90 to 120 VAC, 50 to 400 Hz
200 to 240 VAC, 50 to 60 Hz
Battery Operation Time
120 minutes minimum, 360 minutes nominal
AC Power Consumption
<50 W maximum, <40 W typical
Battery Charge Time
Unit Operating
8 hours for full charge @ 115 VAC, 60 Hz
Unit non-operating
6 hours for full charge @ 115 VAC, 60 Hz
Operating Temperature
-20° to +55°C
Storage Temperature
-20° to +70°C
Humidity
95% (±5%), non-condensing
+10° to +30°C
Dimensions
292 mm wide; 131 mm high; 412 mm deep, does not include handle.
11.4 in. wide; 5.1 in. high; 16.1 in. deep, does not include handle.
Weight
9 kg (20 Ibs.) maximum (with battery) does not include lid and lid contents
Ordering Numbers
Versions
101-110 GPS-101 Global Positioning System Ramp Test Set,
110 VAC operation
101-220 GPS-101 Global Positioning System Ramp Test Set,
220 VAC operation
Accessories
OPT 1 0.1 ppm High Stability Time Base
All Aeroflex Avionics products delivered with Factory Certificate of Calibration
CCOONNNNEECCTTOORR TTYYPPEESS
RF Output
TNC, Female
Auxiliary Port
25-pin D-Sub, Male
RS-232 "REMOTE" (COMM 1)
9-pin D-Sub, Male, PC compatible
RS-232/422 "RECEIVER" (COMM 2)
25-PIN D-Sub, Male, PC compatible
FCC Type Accepted, CFR47 Part 87.
Complies with UL/CSA/EU Product Safety Standards
For the very latest specifications visit www.aeroflex.com
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Toll Free: 800 835 2352
www.aeroflex.com
info-test@aeroflex.com
As we are always seeking to improve our products,
the information in this document gives only a general
indication of the product capacity, performance and
suitability, none of which shall form part of any contract. We reserve the right to make design changes
without notice. All trademarks are acknowledged.
Parent company Aeroflex, Inc. ©Aeroflex 2004.
Our passion for performance is defined by three
attributes represented by these three icons:
solution-minded, performance-driven and customer-focused.
Part No. 46891/034, Issue 3, 08/03
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