Hexagon Veripos LD8 User manual

LD8 FMEA TRIAL GUIDE
(WEBUI)
INTRODUCTION
This guide details how to configure the LD8 receiver to simulate the following FMEA trialrequirements:
1. Loss of Differential Corrections
2. Total Loss of GNSSsatellites
All commandsto the LD8 unit described within thisguideare to be sent using the LD8 WebUIterminal which can be
accessed by navigating to Tools > Terminal as shown below. Further information on how to connectto the LD8
receiver using the WebUIcan be found within the LD8 OperationsManual.
LD8 FMEA TRIAL PROCEDURE –LOSS OF
CORRECTIONS
Before starting the trial,make a noteof the current L-band settings ofthe LD8 unitby entering the following
command into the WebUIterminal:
LOG LBANDTRACKSTAT
The terminal will display a response similar to the following:
LBANDTRACKSTAT WCOM1_30 0 50.5 FINESTEERING 2062 457753.000 0a000020 29e3 15441
3
"IOR" 1545865000 1200 974c 00c2 0 -91.416 43.052 3.6091 15658.910 298176 2330 746
38166528 290966 0.0000
"25E" 1545825000 1200 974c 00c2 0 -223.267 43.704 3.8057 78985.820 1504384 5 5 192561152
515 0.0000
"AORW" 1545845000 1200 974c 00c2 0 -280.645 40.858 2.8379 78986.523 1504448 607 571
192569344 68081 0.0015

LD8 FMEA TRIAL GUIDE
(WEBUI)
The above example shows the LD8 in auto beam mode where multipleL-band beams are being tracked.If the L-
band tracking was set to the Manual mode,then only one beam willbe displayed onthe terminal output. Make a
note of the tracking mode and the selected beams.
To simulate the loss of L-band:
1. Enter the following command into the WebUIterminal:
ASSIGNLBANDBEAM IDLE
2. The LD8 will no longer be locked to an L-band beam.
3. DGNSS solutions(Standard) are valid for 120 secondsand PPP Solutions (Apex, Ultra) are valid for 360
seconds,so allowfor these to timeoutin DP.
4. Once the test is complete enter either of thefollowing commands within theWeb UI:
ASSIGNLBANDBEAM MANUAL BEAMNAME (with ‘BEAMNAME’ being the previously noted beam if manual
beam)
ASSIGNLBANDBEAM AUTO (If auto beamselection isrequired)
5. Wait until the PPP solution is fully restored before conducting the next part of the Trial.
LD8 FMEA TRIAL PROCEDURE –LOSS OF
POSITION
To simulate the loss of GNSS:
1. On the rear of the LD8 unit disconnect the ‘Ant 1’ SMA connector from the Interface Panel:
2. The loss of position will be almost instantly detected by DP.
3. Afterthe simulated failure reconnect the ‘Ant 1’ connector to the LD8 unit and allow time for the position to
recalculate. A DGNSScalculation will take around 120 seconds, but a PPP calculation will take up to 30 minutes
to fully converge.