PMB 248 Spec Specification

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PMB-248

ISSUED DATE

2005/09/14

VERSION

01

PAGE

2/7

GPS Receiver Module

PRODUCT NAME

PUBLISHED BY
Polstar Technologies Inc.

SPECIFICATION
SPEC NO.

:

PMB-248

PART NO.

：

PMB-248

PRODUCT NAME

：

GPS Receiver / PMB-248

DESCRIPTION

：

GPS Receiver (RS232,TTL , Baud Rate
4800bps)

REVISION STATUS
VERSION

DATE

01

2005/09/14

PAGE

REVISION DESCRIPTION

all pages New Issued

Prepared By

PREPARED DESIGNED APPROVED
Ken Hung

Designed By

Ken Hung

S.M. Wang

Approved By

All right reserved by Polstar Technologies Corporation.

PMB-248
PRODUCT NAME

GPS Receiver Module

ISSUED DATE

2005/09/14

VERSION

01

PAGE

3/7

PUBLISHED BY
Polstar Technologies Inc.

INDEX
Item No.

Contents

Page

1.0

Cautions

3

2.0

Electrical Characteristics

4

3.0

Normal Operating Conditions

4

4.0

Specification

4

5.0

Time To First Fix (TTFF)

6

6.0

Interface

6

7.0

Communication Specification

6

8.0

LED Indication

6

9.0

Module I/O Connector Pins

6

10.0

Dimension

7

All right reserved by Polstar Technologies Corporation.

PMB-248
PRODUCT NAME

GPS Receiver Module

ISSUED DATE

2005/09/14

VERSION

01

PAGE

4/7

PUBLISHED BY
Polstar Technologies Inc.

1.0 Cautions
GPS (Global Positioning System) is a satellite-based navigation system. In an unobstructed clear
view of the sky, GPS works anywhere in the world, 24 hours a day.
GPS is developed and operated by the government of United States. Under the policy of the
government, the degradation in accuracy shall occur without prior warnings, and sometimes
satellites don’t transmit signal due to adjustment, test, and orbital revision.
Also, please note:
1. products such as motors, computer, and RF devices, which emit high levels of
magnetic field and interference that may cause the performance of the GPS unit to drop.
2. the optimal position during automobile applications is on the roof top of the vehicles. If the
GPS unit is to be placed inside the car, be certain to avoid coverage by metal objects for
optimal performance.
Please be aware that the performance of the GPS receiver module does not warrant against the
above factors.
(Position Accuracy)
Position data and position accuracy are affected or degraded by the satellite geometry,
electric magnetic interference, and multipath.
(Equipment)
The high frequency noise will interfere with signal receiving. The high frequency noise within the
receiver frequency band, 1575Mhz ±10MHz, will affect the receiver quality. Also, because of
the mixer and modulation, the low frequency noise will be increased by several times. If this
increased frequency drops into the 1575MHz ±10MHz band, it will also affect the receiver
quality.

(Warranty)
If the product fails within one year after the date of delivery while it has been used properly
it will be replaced or repaired free of charge.

All right reserved by Polstar Technologies Corporation.

PMB-248
PRODUCT NAME

GPS Receiver Module

2.0 Electrical Characteristics
Vcc=3.3V
Symbol
Parameter
Vcc
Operation Voltage
VIH
Input High Voltage
VIL
Input Low Voltage
VOH
Output High Voltage
VOL
Output Low Voltage
IL
Input Leakage Current
Cin
Input Capacitance
Cout

Output Capacitance

ISSUED DATE

2005/09/14

VERSION

01

PAGE

5/7

PUBLISHED BY
Polstar Technologies Inc.

Min
3.0
2.0
─
2.4
─
─
─

Typ
3.3
─
─
─
─
─
─

Max
5.5
─
0.8
─
0.4
2
3

Units
V
V
V
V
V
μA
pF

─

─

3

pF

Min
3.0
0
─
-40

Typ
3.3
─
80
25

Max
5.5
3.3
─
70

Units
V
V
mA
°C

3.0 Normal Operating Conditions
Symbol
Parameter
VCC
Power Supply Voltage
VIN
Input Pin Voltage
Pw
Power Consumption(*1)
Top
Operating Temperature
*1: Power Consumption: Typical: 80mA @3.3V
4.0 Specification
Satellite Tracking

12 Parallel channels

RF input

Center frequency
Signal sensitivity

1575.42MHz L1 band, C/A code
-152 dBm or less

Positioning system

Default

WGS-84

Software Selectable

All major coordinate systems

Positioning accuracy

Position
Velocity

Approximately 2m,
0.1m/s

WAAS/EGNOS Support
Average (without SA imposed)

Positioning condition

First Time 3 Satellites

Navigation Update Rate

1second

Operation Temperature

－10℃ to 70℃

Storage Temperature

－40℃ to 100℃

All right reserved by Polstar Technologies Corporation.

PMB-248

GPS Receiver Module

PRODUCT NAME

ISSUED DATE

2005/09/14

VERSION

01

PAGE

6/7

PUBLISHED BY
Polstar Technologies Inc.

5.0 Time To First Fix (TTFF)
Assumes previously listed navigation conditions and 8 satellites in view
TTFF

Typ

Units

Hot Start (time, position, valid ephemeris, and valid almanac)

2

seconds

Warm Start (time, position, no ephemeris, and valid almanac)

33

seconds

Cold Start (time, position, no ephemeris, and valid almanac)

40

Seconds

The G-mouse has to establish location fix before accurate time information can be provided.

6.0 Interface
I/O connector

(Power supply, serial data I/0)

7.0 Communication Specification
Communication method
Transfer rate input/output
Logic levels
I/O code
Communication format
8.0 LED Indicate function
status
1
2
3

pitch 1.25mm 6pin Molex Male

Start-stop synchronization
4800bps NMEA
TTL
ASCII
NMEA

Description
The GPS is In-fix status
The GPS is Not-fix status
The GPS is out of power

LED ON / OFF TIME
Always ON
Flashing
Always OFF

9.0 Module I/O Connector Pins
Pin Configuration
Pin
No.
1
2
3
4
5
6

Symbol

I/O

TTL TX
TTL RX
VCC
GND
TX
RX

O
I
I
G
O
I

Description
TTL TX
TTL RX.
Power supply input.
Power & Data ground.
RS232-TX
RS232-RX

Pin 1

pin6

All right reserved by Polstar Technologies Corporation.

PMB-248
PRODUCT NAME

GPS Receiver Module

ISSUED DATE

2005/09/14

VERSION

01

PAGE

7/7

PUBLISHED BY
Polstar Technologies Inc.

10.0 Dimension

All right reserved by Polstar Technologies Corporation.



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