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RSR GNSS Transcoder™ User Manual
18
© 2017 Jackson Labs Technologies, Inc.
The RSR GNSS Transcoder™ has three major connectors: J4 for power and control of the external
GNSS receiver or PVT/PNT source, 10MHz out, and 1PPS In/Out; J5 which provides the GPS L1
C/A RF output signal to the users’ GPS receiver, and J2 for USB power and serial control.
A secondary 3-pin connector J3 can be used to reset the board, and to place the board into
In-System-Programming (ISP) mode for firmware upgrades as explained in
. Connector J3
is also used to connect an external switch which will send a Zeroize command to the Rockwell
SAASM GPS receiver when pressed (grounded) during normal operation.
shows the five status LEDs available on the RSR GNSS Transcoder™ module.
shows the individual functionality of these status LEDs:
Table 3.1 Status LED Functionality
Ref
Name
Function
Specification
LED D5
FPGA LED
FPGA Health Status
Blinks slowly if FPGA is OK.
OFF: System not initialized
yet, or fault detected
LED D8
GNSS FIX OK
External NMEA Fix
Status
ON: Detection of GNSS Fix
in externally supplied NMEA
stream (external GNSS
Receiver LOCK OK).
OFF: no external PVT/PNT
source is detected, or
source does not indicate
having a 3D GNSS Fix
LED D10
Power/Transmit
Transmit RF ON
Indicator
10Hz blink rate: module is
generating GPS L1 RF
output on the SMA
connector.
ON: Power is on, but RF
output is disabled
LED D18
Internal GPS
FIX OK
1PPS Fix Status of
built-in monitoring
GPS receiver
Blinking at 1Hz: indicates
built-in monitoring GPS
receiver is sensing a good
fix from the simulated GPS
RF SMA connector output
signal.
OFF: internal GPS receiver
is showing an error
condition, or RF output is
disabled
LED D16
CSAC OK
CSAC Built-In Test
(BIST) Status
Indicator (only on
boards with CSAC
option)
ON: CSAC has achieved
Atomic Lock and is
operating normally.
OFF: CSAC is not present,
has not achieved Atomic
Lock yet, or is indicating a
system fault
Содержание RSR GNSS Transcoder
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