RXM-GPS-F4-T Linx Technologies, RXM-GPS-F4-T Datasheet - Page 10

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RXM-GPS-F4-T

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

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
Time To First Fix (TTFF)
TTFF is often broken down into three parts:
Cold: A cold start is when the receiver has no accurate knowledge of its
position or time. This happens when the receiver’s internal Real Time Clock
(RTC) has not been running or it has no valid ephemeris or almanac data.
In a cold start, the receiver takes 35 to 40 seconds to acquire its position.
Warm or Normal: A typical warm start is when the receiver has valid
almanac and time data and has not signifi cantly moved since its last valid
position calculation. This happens when the receiver has been shut down
for more than 2 hours, but still has its last position, time, and almanac
saved in memory, and its RTC has been running. The receiver can predict
the location of the current visible satellites and its location; however, it
needs to wait for an ephemeris broadcast (every 30 seconds) before it can
accurately calculate its position.
Hot or Standby: A hot start is when the receiver has valid ephemeris, time,
and almanac data. This happens when the receiver has been shut down
for less than 2 hours and has the necessary data stored in memory with
the RTC running. In a hot start, the receiver takes 1 second to acquire its
position. The time to calculate a fi x in this state is sometimes referred to as
Time to Subsequent Fix or TTSF.
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