SXBlue GPS Reference Manual
12
3.3 Environmental Requirements
The equipment supplied with the SXBlue GPS system has specific environmental limits that
you should ensure are met when storing and using the system.
The SXBlue GPS receiver is designed to be stored between -40
°
C and +85
°
C. The
operating temperature range is -40
°
C and +70
°
C. The SXBlue GPS is specified to operate
with humidity up to 95% non-condensing.
The antennas are designed to operate in an outdoor environment with 100% relative
humidity, condensing.
3.4 Power Requirements
The SXBlue GPS is powered via a power cable that interfaces to the enclosure’s ‘Power’
connector. This system accepts input voltages between 4.5 to 9 VDC, or 9 to 18 VDC or 18
to 36 VDC (depending on your SXBlue GPS model). For best performance, the supplied
power should be continuous and clean. The following table details the power specifications
of the SXBlue GPS.
Table 3-1 Power Requirements
Input Voltage
Average Input Current
Input Power Nominal
4.5 to 9 VDC
< 865 mA @ 5 VDC
< 4.35 W
9 to 18 VDC
< 270 mA @ 12 VDC
< 3.25 W
18 to 36 VDC
< 125 mA @ 24 VDC
< 3.00 W
3.5 Antenna Placement
The GPS antenna included should be mounted pursuant to the following requirements:
•
The SXBlue GPS receiver computes a position based upon measurements from each satellite
to the location of the GPS antenna’s phase center. Mount the GPS antenna in the location for
which you desire a position. When choosing a location to mount the antenna, please ensure
that there is an unobstructed hemisphere of sky available to the GPS antenna. This will ensure
that GPS and SBAS satellites are not masked by obstructions, potentially reducing system
performance.
•
It is important to locate any transmitting antennas away from the GPS antenna by several feet
or more. This will help to ensure that tracking performance of the SXBlue GPS is not
compromised, giving you the best performance possible.
•
Make sure that there is sufficient length of the antenna extension cable available in order to be
able to connect it to the SXBlue GPS enclosure.
Do not locate the antenna where environmental conditions exceed those specified in
Section 3.3.