Jackson Labs LTE-Lite, Руководство пользователя

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LTE-Lite User Manual
2.2 Connector, Buttons and Switches on the Evaluation Board
Table 2.1 shows the LTE-Lite Evaluation Board connectors, buttons, switches, and LEDs.
Table 2.1 LTE-Lite Evaluation Board connectors, buttons, switches, and LEDs
Ref Name Function Specification Pinning/Usage
JP2 +5V Optional External
+5V Supply. Use
when USB power
supply is not
available 5V DC +/-20%, <0.08A, <10mVac Pin close to USB connector: +5V
Pin close to Mounting Hole: GND
J3 Position Hold
Mode or Mobile
Mode selector Selects if the unit is
used in stationary
mode or mobile
mode Open (default): Auto Survey mode
with Position Hold function is
enabled
Jumper Inserted: Auto Survey mode
is disabled, and Mobile (3D) mode is
selected
WARNING: DO NOT CHANGE THE
SETTING OF THIS JUMPER WITH
POWER APPLIED TO THE UNIT,
THIS MAY CORRUPT THE FLASH
OF THE GPS RECEIVER
PERMANENTLY.
Insert a jumper between Pin 1 to Pin
2 to disable Auto Survey mode. Only
change this jumper with power to the
unit being turned off.
WARNING: DO NOT CHANGE THE
SETTING OF THIS JUMPER WITH
POWER APPLIED TO THE UNIT,
THIS MAY CORRUPT THE FLASH
OF THE GPS RECEIVER
PERMANENTLY.
J2 20MHz, 10MHz,
or 19.2MHz
CMOS Out Buffered RF output
from internal TCXO +3.0V CMOS 20MHz, 10MHz, or
19.2MHz Output, can drive up to
+/-24mA. Frequency depends on
TCXO selection Center-RF Output, Shield-GND
J1 1PPS CMOS Out 1PPS Signal
Aligned to UTC +3.3V CMOS 1PPS Output, can
drive up to +/-10mA Center-1PPS Output, Shield-GND
U3 USB Port Supplies Power and
NMEA output strings Standard USB 2.0 Full Speed Mini USB
J5 Synthesized RF
output Un-buffered output
of internal PLL
Synthesizer 3.3V CMOS, can supply up to
+/-10mA, frequency selected via
three jumpers
Center- RF Output, Shield- GND
J4 Antenna In GPS Antenna
Input GPS 1575MHz antenna input,
supplies DC +3.3V to antenna
with up to 60mA current
Center- RF Output, Shield- GND
SW1 NMEA/Status
Selector Switch Selects if either
GPS NMEA data
or an Oscillator
Status sentence is
sent to USB port For GPS NMEA output: 38.4K
Baud 8N1, supported sentences:
GGA, GLL, GSA, GSV, RMC,
VTG, ZDA
For Status output: 38.4K Baud
8N1, oscillator and system
health status string. Proprietary
NMEA sentence Left: GPS NMEA
Right: Oscillator Status