RXM-GPS-F4-T Linx Technologies, RXM-GPS-F4-T Datasheet - Page 11

• Manufacturer Part Number: RXM-GPS-F4-T
• Description: GPS Modules F4 Series GPS Recvr Module Tape and Reel
• Manufacturer: Linx Technologies

Specifications of RXM-GPS-F4-T

• Rohs: yes
• Frequency Band: 1575.42 MHz
• Number Of Channels: 48
• Time To First Fix (cold Start): 32 s
• Acquisition Sensitivity: - 159.5 dBm
• Horizontal Position Accuracy: 3 m
• Operating Supply Voltage: 1.8 V
• Operating Supply Current: 56 mA
• Interface Type: Serial
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Dimensions: 15 mm x 13 mm x 2.2 mm
• Minimum Operating Temperature: - 30 C

Module Description
The F4 Series GPS Receiver module is based on the SiRFstarIV chipset,
which consumes less power than competitive products while providing
exceptional performance even in dense foliage and urban canyons. No
external RF components are needed other than an antenna. The simple
serial interface and industry standard NMEA protocol make integration of
the F4 Series receiver into an end product extremely straightforward.
The module’s high-performance RF architecture allows it to receive GPS
signals that are as low as –160dBm. The F4 Series can track up to 48
satellites at the same time. Once locked onto the visible satellites, the
receiver calculates the range to the satellites and determines its position
and the precise time. It then outputs the data through a standard serial port
using several standard NMEA protocol formats.
The GPS core handles all of the necessary initialization, tracking, and
calculations autonomously, so no programming is required. The RF section
is optimized for low level signals, and requires no production tuning.
Power Supply Requirements
The module requires a clean, well-regulated power source. While it is
preferable to power the unit from a battery, it can operate from a power
supply as long as noise is less than 20mV. Power supply noise can
signifi cantly affect the receiver’s sensitivity, therefore providing clean power
to the module should be a high priority during design. Bypass capacitors
should be placed as close as possible to the module. The values should be
adjusted depending on the amount and type of noise present on the supply
line.
The 1PPS Output
The 1PPS line outputs 1 pulse per second on the rising edge of the GPS
second when the receiver has an over-solved navigation solution from
fi ve or more satellites. The pulse has a duration of 200ms with the rising
edge on the GPS second. This line is low until the receiver acquires an
over-solved navigation solution (a lock on more than 4 satellites). The
GPS second is based on the atomic clocks in the GPS satellites, which
are monitored and set to Universal Time master clocks. This output and
the time calculated from the GPS satellite transmissions can be used as a
clock feature in an end product.
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