User guide

Status LEDs

The receiver has four status LEDs. Each LED can have four conditions, off (O), on green (G), on yellow (Y), and on red

(R). The four letters in the LED code column are arranged left-to-right as viewed on the instrument. The letters indi-

cate the condition of each LED. The meaning of the code is in the description column.

Code Description

OOOO No power applied

RRRR CPU Exception to unknown vector

OROR RAM Failure

ORRO Bootloader checksum failure

ORRR Kernel Failure

OOOR CPU Fault - Illegal instruction

OORO CPU Fault - Address error

OORR CPU Fault - Unimplemented A-line

OROO CPU Fault - Unimplemented F-line

YYOO Bootloader RAM test pass

YYYO Bootloader loaded

YYYY Bootloader running

GYYY Operating system loaded

GGYY Operating system running

GGGY Main applications running, but calibration data has not

been loaded (the probe is disconnected).

GGGG System is ready with all components connected and

all calibration data loaded.

YGGY Loading FPGA image.

RYYY DSP Error – general or initialization failure.

YRYY DSP error – DCM lock failure.

YYRY DSP error – PLL lock failure.

YRRY DSP error – heartbeat flat-line. DSP stopped

producing data.

YYYR Fatal application software error – unrecoverable

exception caught.

RYRY Fatal application software error – assertion failure.

YRYR Fatal application software error – segmentation fault.

YYRR Fatal application software error – bus error.