BT-77 Bluetooth GPS Receiver

The BT-77 Bluetooth GPS Receiver is am amazing small device that can give you an accurate GPS tracking down to the point of where you are standing within a few meters with the device on your hands. I use this device for road navigation with Microsoft Autoroute or TomTom.

It comes with 16 channels which means it can track 16 different satellites which are going around the Earth. And because it use Bluetooth technology, it can work with almost any phones or PDAs that comes with Bluetooth. The battery can give you 20 hours of usage. And what's good with the battery is, it's a bog standard Nokia battery which you can find in many shops if you need another spare battery! The model number for this Li-ion battery is HXE-W01.

Not getting a good signal? No worries, you can plug an external antenna into the antenna socket on the side of the device and it will give you a signal boost.

Want to see some pictures of this? Of course you would! Check it out at my BT-77 Bluetooth GPS Receiver's Gallery!

But first, the purpose of this page is to give you as much information as I can about this device. So, here goes...

General
GPS Chipset: NEXERIX GPS Module
Frequency: L1, 1575.42MHz
C/A Code: 1.023MHz chip rate
Channels: 16 CH all in view tracking
Antenna (internal): Built-in low noise
External Antenna Port Active MMCX Antenna

Sensitivity
147 dBm Tracking, Superior Urban Canyon Performance

Acquisition Rate
Cold Start: 45 seconds average
Warm Start: 38 seconds average
Hot Start: 10 seconds average
Reacquisition: 100ms average

Power
Rechargeable 5VDC 850mAh Li-on battery - model HXE-W01
Operation Current: 45mA (Typicial)
Operation time: 20 hours continuous (Max)
Charging time: 2.5 hours (Typicial)

Environmental
Operating Temperature: -20°C to +60°C
Relative Humidity: 5% to 90% non-condensing

Accuracy
3 meters CEP (50%) without SA (Horizontal) 7 meters (90%)
Velocity: 0.1 m/sec without SA
Time: ±100 ns synchronized to GPS time

Dynamic Conditions
Altitude: <18,000 m
Velocity: <515 m/sec
Acceleration: <4 g
Motional: Jerk20 m/sec

GPS Protocol
NMEA-0183 (V3.01) - GGA, GSA, GSV, RMC - update interval 1 second (Default)
Datum
WGS-84 (or by demanded)

Interface
Communicate with host platform via Bluetooth (class 2) serial port profile
Band rate 9600 bps (Data bit: 8, Stop bit: 1)

Device Size
81 (L) x 44 (W) x 20 (H) mm
3.2 (L x 1.75 (W) x 0.79 (H) inch
Weight: <70 g