The SGM- 207 series GPS receiver incorporates low noise, high sensitivity, and low power consumption SiRF starIII chipset solution in a compact, waterproof enclosure. The receiver is very suitable for broad applications such as car navigation, mapping, surveying, security and so on. Only clear view of sky and certain power supply are necessary to the unit. It communicates with other host device via one full duplex serial communication PS2,USB, RS-232 , SN4, RJ-11, RJ-45 port or one universal TTL and save satellite date by built-in backup memory . L ow power consumption technology enables SGM-207 and your device to save more operation power. Furthermore, the receiver tracks up to 20 satellites at a time while offering fast time-to-first-fix, re-acquires satellite signals in 1 00 ms (average) and updates position data every second. Trickle-Power allows units to operate a fraction of the time, and Push-to-Fix permits users to have a quick position fix even though the receiver stays off.

※SiRF Star III Low Power Consumption Chipset
※Integrated ARM7TDMI CPU
※Cold Start : within 50 seconds
※20 parallel satellite-tracking channels for fast acquisition and reacquisition
※A rechargeable battery sustains internal clock and memory. The battery is recharged during normal operation
※Support NMEA 0183 V2.2 command
※Differential capability utilizes real-time RTCM corrections producing 1-5 meter position accuracy.
※User initialization is not required.
※Dual communication channels and user selectable baud rates allow maximum interface capability and flexibility.
※Optional communication levels, RS-232 and TTL meet ordinary application and new fashions of connecting PDA with TTL or RS-232 output.
※Built-in WAAS Demodulator.
※LED display status: The LED provides users visible positioning status. LED “BLINKING” when power connected and “ON” when SGM-207 got positioned.
※FLASH base program memory

Key Feture
Frequency                        L1, 1575.42 MHz
C/A Code                         1.023 MHz chip rate
Channels                         20
Sensitivity Acquisition        -144~ -149 dBm Tracking: -155~ -160dBm

Non DGPS (Differential GPS)
Position Horizontal            5 to 25 meter CEP, without SA
Velocity                           0.1 meter/second, without SA
Time                               1 microsecond synchronized GPS time

DGPS (Differential GPS)
Position Horizontal            1 to 5 meter, typical
Velocity                           0.05 meter/second, typical
EGNOS/WAAS                   < 2.2 m, horizontal 95% of time
Datum                            WGS-84

Performance
Hot start                          1sec., average
Warm start                      32 sec., average
Cold start                        48 sec., average
Reacquisition                   0.1 sec. average
GPS Protocol Default:        NMEA 0183 V2.2 (Secondary: SiRF binary)
GPS Output Data              SiRF binary >> position, velocity, altitude, status and
                                      control; NMEA 0183 protocol, and supports command: GGA, GSA,                                        GSV, RMC, VTG, GLL (VTG and GLL are optional)
GPS transfer rate              Software command setting (Default: 4800, n, 8, 1 for NMEA)
Acceleration Limit              Less than 4g
Altitude Limit                   18,000 meters (60,000 feet) ma
Velocity Limit                   515 meters/sec. (1,000 knots) max.
Jerk Limit                        20 meters/second, max
Operating                       -40℃ to +85℃(internal temperature).
Storage                          -45℃ to +100 ℃
Input Voltage                 +4.75 ~ 5.5 VDC without accessories.
Power consumption         <80mA at 4.5-5.5V input
Dimension                      2.36" x 1.57" x 0.7" (60mm x 40mm x 17.83mm)
Cable Length                  60" (1500mm)

Output Terminal and Definition

The SGM- 207 series GPS receiver includes a variety of models. The main difference is the output connector. These interface options are described in the following.

SGM- 207 PS2

SGM- 207-PS2 is with a PS2 DIN jack output connector. Following figure shows various connection arrangements. The one-piece cigarette lighter adapter assembly allows you to utilize power from the front power socket of vehicles. Simply connect SGM- 207 to the PS-2 plug of the adapter assembly and link the other connector to your PDA. For Notebook users, a PS-2 to USB adapter assembly is required. This is an optional purchase. A CD with USB driver is provided with the assembly. For users intend to use RS-232 port of PC or Notebook, the other optional adaptor assembly can be purchased.


SGM-207 USB
This model provides users a direct connection to a Notebook or other host devices with USB connectors. USB driver is required and provided in the CD.

SGM-207 SN4
This model provides users a direct connection to SN4 connector. It is convenient for users with SN4 connector in their host devices.

2.3 Connector
Following are the description of the output connector.

SGM-207 PS2
Standard cable is two meters in length with a female PS-2 Jack as shown in the following.

Pin assignment of standard PS-2 Din Jack connector is in the following drawing and table.

For users with PC or Notebook, a USB interface cable or RS-232 adaptor cable shown in previous page may be used. Drivers for the USB interface cable are available on a CD associated with the cable. These are optional purchases.

SGM- 207 SN4