SYSTEM CONFIGURATION AND SETTINGS Page 29
The
SNR
column shows the SNR for each received satellites signal. A
good antenna installation should receive three or more satellites with
SNR values above 50. If few satellite signals are received, and / or the
received signals have low SNR ratings, this could indicate that the GPS
reception is poor and that the position of the antenna needs to be
adjusted. See section 4.3.1 for antenna placement guidelines.
4. If installing a DGPS configuration with a R4 DGPS Navigation Sensor,
it is also possible to monitor the received radio beacon signal strength.
Follow the steps below.
Go back to the
Position
view by pressing
ESC
and then press function
key
Beacon Status
.
Use
∨
to scroll down to the second page of
information so the SNR value can be inspected. The following view
should be displayed.
The observed radio beacon SNR value should be interpreted as follows:
SNR Description
Data
Throughput
>25 Excellent
100%
data
throughput
20 to 25
Very Good
100% data throughput
15 to 20
Good
Good data throughput up to 100%
10 to 15
Stable
Moderate to good data throughput
7 to 10
Intermittent
Low data throughput
<7
No Lock
No data throughput
If the received signal has a low SNR rating, this could indicate that the
radio beacon reception is poor and that the position of the Combined
GPS/Beacon antenna needs to be adjusted. See section 4.3.1 for antenna
placement guidelines.
6.8
Specifying Port Communication Rates
To connect external systems and sensors to the R4 Navigation System, the
communication rates of the serial ports might have to be adjusted. The speed
log output rate can also be adjusted – per speed log output is disabled. To
adjust these settings, follow the steps below.
1. Enter
Config
mode by pressing the
MODE
key followed by function
key
CONFIG
.
Summary of Contents for 1000 R4
Page 18: ...MOUNTING Page 12 Figure 4 7 Panel mounting R4 Display Figure 4 8 R4 Display panel mounted ...
Page 79: ...TECHNICAL SPECIFICATIONS Page 11 ...
Page 80: ...TECHNICAL SPECIFICATIONS Page 12 APPENDIX A J4N SCHEMATIC ...
Page 81: ...TECHNICAL SPECIFICATIONS Page 13 APPENDIX B J4N PCA LAYOUT ...