Globalsat Technology bu-303 (sirf iii), bu-353 (sirf iii) User Manual

PAGE 12 OF 13

USB_GPS_WIN_ v2.1

USB GPS (WIN)

11. BU-303 SPECIFICATIONS

Electrical Characteristics (Receiver)

GPS Chipset

SiRF Star II e/LP

Frequency

L1, 1575.42 MHZ

C/A Code

1.023 MHz chip rate

Channels

12 all-in-view tracking

Sensitivity

-147

dBm

Accuracy

Position Horizontal

10m 2D RMS WAAS enabled
15m 2D RMS WAAS disabled

Velocity

0.1m/sec 95% (SA off),

Time

1 micro-second synchronized to GPS time

WAAS

Enabled for North America product s (USGlobalSat, Inc)

Datum

Datum

WGS-84

Acquisition Rate

Hot start

8 sec., average (with ephemeris and almanac valid)

Warm start

38 sec., average (with almanac but not ephemeris)

Cold start

45 sec., average (neither almanac nor ephemeris)

Reacquisition

0.1 sec. average (interruption recovery time)

Protocol

GPS Protocol

Default: NMEA 0183 (Secondary: SiRF binary)

GPS Output Data

SiRF binary >> position, velocity, altitude, status and control
NMEA 0183 MEA0183 V2.2 protocol, and supports
command: GGA, GSA, GSV, RMC, VTG, GLL v2.2 (VTG
and GLL are optional)

GPS transfer rate

Software command setting (Default : 4800,n,8,1 for NMEA )

Dynamic Condition

Acceleration Limit

Less than 4g

Altitude Limit

18,000 meters (60,000 feet) max.

Velocity Limit

515 meters/sec. (1,000 knots) max.

Jerk Limit

20 m/sec**3

Temperature

Operating

-40°~ 176°F (-40°~ 80°C)

Storage

-40°~ 176°F (-40°~ 80°C)

Humidity

Up to 95% non-condensing

Power

Voltage

5V ±5%

Current

90mA

typical

Physical Characteristics

Dimension

2.32" x 1.65" x 0.82" (59mm x 47mm x 21mm)

USB Cable Length

60" (152 cm)

Low Noise Amp

Amplifier Gain w/out cable

27 dB Typical

Filtering

-25dB (+100 MHz)

Output VSWR

2.0 Max.

Voltage

DC 3 ~ 5.0V

Current

15mA max @ 5VDC

Due to continuous product improvements, all specifications are subject to change without notice.

FCC NOTICE

This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions:

(1) This device may not cause harmful interference, and (2) This device must accept any interference received, including interference that may cause

undesired operation. FCC RF Exposure requirements: This device and its antenna(s) must not be co-located or operation in conjunction with any other

antenna or transmitter. NOTE: THE MANUFACTURER IS NOT RESPONSIBLE FOR ANY RADIO OR TV INTERFERENCE CAUSED BY

UNAUTHORIZED MODIFICATIONS TO THIS EQUIPMENT. SUCH MODIFICATIONS COULD VOID THE USER'S AUTHORITY TO OPERATE

THE EQUIPMENT.