The 7 LED's:
There is a heartbeatimplemented
with the LEDs: All LEDs flash for a short moment about every 1 second if there
is no antenna connected. This is to inform that the Beast is anyway active and
working, waiting for a signal.
1 Channel Firmware 1.31
|
green |
red |
red |
green |
blue |
yellow |
green |
|
DF-0, DF-4, DF-5 |
DF-11 |
DF-17,DF-18 |
DF-20,DF-21 |
Output overload |
RS232 transfer |
Power On |
2 Channel Firmware 1.31
|
green |
red |
green |
red |
blue |
yellow |
green |
|
DF-11 |
DF-17, DF-18 |
DF-11 |
DF-17, DF-18 |
Output overload |
RS232 transfer |
Power On |
DF-xx Downlinkformats
receiving.
Output overload: The Fifo-Buffer of the Beast overruns,
the user reads data to slowly. To solve this situation:
Always have DIP#8 in ON position in order to enable RTS handhake.
If you see the blue LED flashing for
longer periods, there are several ways to solve this:
1. Disable Mode-A/C decoding if you are not interested in this data, e.g. for Beamfinder and Beamfinder plus
-> set DIP#10 to OPEN
2. Mask all DF-0, DF-4, and DF-5 frames. These are reduandant
to DF-20, DF-21 and DF-17. -> set DIP#7 to ON
3. If that still does not help, only decode DF-11 and DF-17 -> set DIP#4 to
ON
The 10 Dip-Switches:
|
Baudrate |
SW1 |
SW2 |
Usage |
|
3 MBit/sec |
open |
open |
USB serial interface (with USB over FT232R only) |
|
921600 Bit/sec |
on |
open |
Lantronix Xport
and FT232R USB |
|
230400 Bit/sec |
open |
on |
Lantronix Xport interface |
|
115200 Bit/sec |
on |
on |
Bluetooth |
Note that
depending on your local traffic rate the interface baudrate
is the real bottleneck of your system! So if you see a significant miss here, first
introduce the DF-0/4/5 filter with DIP #7, and if that does not help, switch on
DF17/DF11 filter with DIP#4.
The Mode-S
frames capability of the different baudrates is about
|
|
rough number of Mode-S Frames
per Second max. in UDP Format |
rough numberMode-S
Frames per Second max. in Binary Format |
|
3 MBit |
>2000 |
>4000 |
|
921600 Bit/Sec |
1100 |
2200 |
|
230400 Bit/Sec |
550 |
1100 |
|
115200 Bit/Sec |
300 |
600 |
Mode-AC frames are transmitted with lower priority,
so if your interface is already conguested with
Mode-S frames, you will see less or no Mode-AC frames.
The Beast has 2 output-formats:
|
Output -Format |
SW3 |
Usage |
|
AVR Format |
open |
Output in AVR-Format (Formatdescription see Dip5) |
|
Binär Format |
on |
Output in Binary-Format |
The Binary-Format knows 3 different Formatlength
every frame starts with
hex=1A.
|
Format Mode A/C |
1 |
6 Byte MLAT-Time, 1 Byte Signalstrength, 2 Byte Mode A/C Squawk oder Altitude |
|
Format Kurz-ADS-B |
2 |
6 Byte MLAT-Time, 1 Byte Signalstrength, 7 Byte Mode S kurze
Downlinkformate |
|
Format Lang-ADS-B |
3 |
6 Byte MLAT-Time, 1 Byte Signalstrength, 14 Byte Mode S lange
Downlinkformate |
Selected Binaryformat ignores MLAT-Timer (set with
Dip5). If output in AVR-Format with MLAT-Time needed, then
Dip3 open and Dip5 on.
|
only DF-17 |
SW4 |
Usage |
|
Alle Standard DF's |
open |
The beast
decodes all ADS-B Downlinkformat: |
|
only DF-17 |
on |
Only Downlinkformats:
DF-11 und DF-17 are decoded. |
|
MLAT -Format |
SW5 |
Usage |
|
MLAT off |
open |
No MLAT-output, data
frames are initiated with '*' AVR-Format |
|
MLAT on |
on |
Yes, MLAT-output with
12MHz as 6-Byte-clock every frame is initiated with '@' |
AVR Format if Dip3 is open:
|
MLAT |
SW5 |
Format |
||||||
|
off |
open |
Standard output:
Example: |
||||||
|
on |
on |
Format with MLAT timedate:
Example: |
|
CRC disable |
SW6 |
Usage |
|
CRC with DF-11 and DF-17 |
open |
DF-17 frames are checked
for a total match of the CRC |
|
No CRC check |
on |
No CRC check is done for
any frame. This can be used in conjunction with the CRC and biterror
correction PC software driver or Planeplotter's
FEC correction in order to get a higher frame rate. |
|
|
|
DF-0/DF-4/DF-5 Filter |
SW7 |
Usage |
|
No Filter |
open |
All DF-0/4/5 are decoded |
|
AlleDF-0/4/5 Frames |
on |
All DF-0 und DF4 und DF5 are filtered off |
|
RTS Handshake |
SW8 |
Usage |
|
No Handshake |
open |
As long as you do not
experience any data loss, hardware handshake is not necessary to be enabled. |
|
Handshake on |
on |
In case of a high frame
rate and/or togehter with a slow PC, it might be useful
to configure and enable RTS hardware handshake. |
|
|
|
1 Bit FEC disable |
SW9 |
Usage |
|
Forward error correction enable |
open |
The CRC checksum of
Mode-S frames allows a correction of up to 5 bits. 1 Bit errors are those
appearing most often and are corrected with this feature by the Beast.
|
|
disable |
on |
There is no bit error
correction done in the Beast.
|
|
|
|
Mode-A/C decoding |
SW10 |
Usage |
|
disabled |
open |
No Mode-A/C frames are
decoded by the Beast
|
|
enabled |
on |
.Mode-S beast also
decodes Mode-A/C frames |