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Home > Hardware Reviews > Mobiles

Monday, September 11, 2006
Globalsat TR-101

1. Introduction

- Introduction

Globalsat has been a pioneer in presenting innovating products especially around SiRF III enabled GPS devices. The latest announcement about a SiRF III device with tracking abilities raised our curioucity and therefore we decided to review the new TR-101 device.

- Globalsat TR-101

The GlobalSat TR-101 is a personal remote positioning device with built-in GPS and GSM modules. It is compact and portable. There are three speed-dial keys and one emergency key on the Globalsat TR-101. You can use these features for protecting and searching for children and old people. You can use it as a security device to track anything that needs remote monitoring.

Globalsat BT-359S

- Features

• GPS personal locator.
• GSM/SMS communication.
• Omni-directional high sensitivity GPS antenna which can receive GPS signal from all direction.
• New technology and latest SiRF Star III chipset! Excellent for fixing the position even at a weak signal status.
• Remote command control via mobile phones and/or through online software.
• Receive phone calls to have two way communications.
• It can filter incoming calls for up to 10 phone numbers. Only these 10 numbers can call in to the TR-101's and check its position.
• 3 quick dialing buttons for preset phone numbers.
• Works worldwide since supports 4-frequency GSM 850/900/1800/1900 MHz.
• SOS button send out exact location for immediate rescue/action.
• Independent SOS (emergency) button which will send GPS location information via SMS for up to 3 preset numbers (it can be 3 sets of different numbers than the 3 sets of quick dialing numbers).
• Device can be connecting to PC by using a USB cable for setup the arguments (package comes with mini USB cable when you purchase the device).
• Low battery notification before the battery dies out!

According to Globalsat, you can easily use free Google Earth mapping software or Google maps to check the location of TR-101, giving you instant access to valuable information. Note that Globalsat has already another model (TR-102) with increased functionality via GPRS protocol:

- Used chipset

The SiRF III chipset has the following specifications:

SiRF Star III WAAS enabled
1, 1575.42 MHz
C/A code:
1.023 MHz chip rate
20 channel all-in-view tracking

Acquisition: -148dBm
Tracking: -159 dBm

Position Accuracy:
10 meters, 2D RMS 
~ 5 meters, 3D RMS WAAS
0.1 m/s
us synchronized to GPS time
WGS-84 Acquisition Time (Open sky, stationary)
0.1 sec., average
Hot start:
1 sec., average
Warm start:
38 sec., average
Cold start:
42 sec., average
18,000 meters (60,000 feet) max.
515 meters/second (1000 knots) max.
Less than 4g
20 m/sec
Protocol messages:
NMEA-0183 output protocol, BluetoothInterface Baud Rate 4800bps
Output format:
GGA(1sec), GSA(5sec), GSV(5sec), RMC(1sec)
Operating temperature:
-20° to 60° C
5% to 95% Non-condensing

In addition, the device has a GSM module compatible with GSM 850/900/1800/1900 MHz networks, with the following SAR values:

  • GSM850 Head: 0.758
  • PCS1900 Head: 0.735
  • GSM850 Body(GSM): 0.206
  • PCS1900 Body(GSM): 0.177
  • GSM850 Body(GPRS): 0.21
  • PCS1900 Body(GPRS): 0.223

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