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Data Sheet

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Q4000 Technical Data Sheet
Document 1135-0902, REV K 15
3 Modem Wireless Communication
Global Positioning System (GPS)
3.1
• Internal GPS
o Performance
22-channel GPS chipset.
Rapid Time-To-First-Fix (TTFF) 60 seconds from a Cold Start, 25 seconds from
warmstart, 2 seconds from hotstart (Depending on antenna and signal strength)
Accuracy within 2.5 meters
Updates raw location data every 1 second
Sensitivity: -160 dBm for tracking and -146 dBm for acquisition
o Features
Antenna detection - The GPS detection is a current measurement based result. The
typical detection threshold is 3mA for an OPEN/OK and greater than 130mA for a
SHORT. A measured current of less than 3mA will result in an OPEN. A measured
current greater than 6mA but less than 130mA will result in an OK. A measurement
greater than 130mA will result in a SHORT. Note that the thresholds are typical and
will vary +/- 2mA low end and +/- 5mA high end.
GPS Antenna Current: 6mA to 30mA.
Utilizes a passive or active 3.0V to 3.5V GPS antenna (Active recommended).
Active antenna with 20-50 dB gain @ 3.3 VDC. Max noise figure 1.5 dB
o GPS Serial Port - RS-232 Tx signal line contains NMEA data that can be used externally if
desired.
Pins: 14 (Tx), and GND (Pin 11, 19, 21, 30 or 40).
Pin 12 (GPS_RX_RS232) is not connected for an internal GPS module
NMEA 0183 data available externally on Pin 14, GPS_TX_RS232
• 9600 Baud, 8 bits, no parity bit, 1 stop bit
• Updates location data every 1 second
• External GPS
o GPS Serial Port - If there is no internal GPS, the GPS RS-232 serial port can be used to
interface to an external GPS module or for other application needs.
Pins: 12 (Rx), 14 (Tx), and GND (Pin 11, 19, 21, 30 or 40).
The GPS connector has a white circular area and a small hole at the center. This hole has small
metal fingers in it that make conntact with the pin in the antenna connector on the GPS patch. This is
the center conductor.
Do not feed voltage into or short the GPS port to ground. The Q4000 supplies DC bias voltage
on the antenna center conductor. Violating this warning may cause damage to the unit and void the
warranty.
Global System for Mobile Communications (GSM)
3.2
• Internal GSM
o Performance
Transmit Output Power 2W (Class 4) for 850/900 bands
1W (Class 1) for 1800/1900 bands
Sensitivity -107 dBm @ 850/900 MHz
-106 dBm @1800/1900 MHz