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Update AIS docs to match latest UI.

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Jon Beniston
2026-08-01 21:17:16 +01:00
parent 2cb8091c54
commit 9a2d3f683a
2 changed files with 18 additions and 14 deletions
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plugins/channelrx/demodais/readme.md
+18 -14
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@@ -48,35 +48,35 @@ This setting scales the output of the FM discriminator, which is used to detect
The threshold for the normalised correlation between the received signal and the preamble (training sequence), from 0 to 1. Being normalised, it does not depend on signal level, so the same setting works for strong and weak signals. Real preambles correlate above 0.9 and the default of 0.6 sits well clear of the noise floor. A lower value may demodulate slightly weaker signals, but increases processor usage sharply, because every threshold crossing starts a sequence detection.
<h3>7: Find</h3>
<h3>7: UDP</h3>
Entering a regular expression in the Find field displays only messages where the source MMSI matches the given regular expression.
When checked, received messages are forwarded to the specified UDP address (8) and port (9).
<h3>8: Clear Messages from table</h3>
Pressing this button clears all messages from the table.
<h3>9: UDP</h3>
When checked, received messages are forwarded to the specified UDP address (10) and port (11).
<h3>10: UDP address</h3>
<h3>8: UDP address</h3>
IP address of the host to forward received messages to via UDP.
<h3>11: UDP port</h3>
<h3>9: UDP port</h3>
UDP port number to forward received messages to.
<h3>12: UDP format</h3>
<h3>10 UDP format</h3>
The format the messages are forwarded via UDP in. This can be either binary (which is useful for SDRangel's PERTester feature) or NMEA (which is useful for 3rd party applications such as OpenCPN).
<h3>13: Use Date and Time from File</h3>
<h3>11: Find</h3>
Entering a regular expression in the Find field displays only messages where the source MMSI matches the given regular expression.
<h3>12: Use Date and Time from File</h3>
When checked, if the source device is a File Input device, the date and time used for
packet reception time is taken from the file playback time. Otherwise, the current system clock time is used.
<h3>13: Show / hide Slot Map</h3>
When checked shows the slot map (See below).
<h3>14: Start/stop Logging Messages to .csv File</h3>
When checked, writes all received AIS messages to a .csv file.
@@ -89,6 +89,10 @@ Click to specify the name of the .csv file which received AIS messages are logge
Click to specify a previously written .csv log file, which is read and used to update the table.
<h3>17: Clear Messages from table</h3>
Pressing this button clears all messages from the table.
<h3>Slot Map</h3>
AIS uses TMDA (Time Division Multiple Access), whereby each one minute frame is divided into 2,250 26.6ms slots.