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Add User Guide text on WSPR band-hopping.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6109 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
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@ -1,5 +1,5 @@
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include::./links.adoc[]
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_{prog}_ is free software: you can redistribute it and/or modify
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_{prog}_ is free software: you may redistribute and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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@ -42,9 +42,6 @@ is the average spectrum since the start of the present UTC minute.
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*Linear Avg* is useful in JT4 mode, especially when short-form
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messages are used.
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for JT9 or JT65; it is intended for use
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with the yet-to-be implemented JT4 mode.)
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- Four sliders control reference levels and scaling for waterfall
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colors and the spectrum plot. Values around midscale are usually
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about right, depending on the input signal level, the chosen palette,
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@ -27,18 +27,10 @@ particular radios have been removed.
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Much work has already been done on Version 1.7 of _WSJT-X_. (Up to
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now this branch has been called v1.6.1.) More than 100 people have
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been building this version for themselves, as development progresses,
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and reporting on their experiences. The next release will likely have
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the following features not present in Version 1.6.0, and perhaps
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others as well:
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- *JTMSK* mode, intended for meteor scatter, ionospheric scatter,
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aircraft scatter, and the like. Unlike the FSK441, ISCAT, and JTMS
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modes present in the older program _WSJT_, *JTMSK* uses forward error
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correction and structured messages identical to those in JT4, JT9, and
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JT65.
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- A significantly improved decoder for JT65, especially advantageous
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when used in crowded HF bands. Starting with Version 1.7, _WSJT-X_
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will no longer use the patented, closed-source Koetter-Vardy
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algorithm.
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been building this version for themselves as development progresses,
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and reporting on their experiences. The next release will offer
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several ``fast modes'' intended for meteor and ionospheric scatter,
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including a new FEC-enhanced mode called *JTMSK*. It will also have a
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significantly improved JT65 decoder, especially advantageous when used
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in crowded HF bands. Starting with Version 1.7, _WSJT-X_ will no
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longer use the patented, closed-source Koetter-Vardy algorithm.
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@ -131,7 +131,6 @@ include::tutorial-example2.adoc[]
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== WSPR Mode
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include::wspr.adoc[]
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[[VHF_AND_UP]]
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== VHF+ Features
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include::vhf-features.adoc[]
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@ -19,7 +19,54 @@ transmitting) and activate the *Enable Tx* button.
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- Select your Tx power (in dBm) from the drop-down list.
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- To enable automatic band-hopping, check the indicated box and click
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*Schedule* to select the bands you will use at each time of day.
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=== Band Hopping
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WSPR mode allows those with CAT-controlled radios to investigate
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propagation on many bands without user intervention. Coordinated
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hopping enables a sizable group of stations around the world to move
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together from band to band, thereby maximizing the chances of
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identifying open propagation paths.
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- To enable automatic band-hopping, check the *Band Hopping* box on
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the main window.
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- Click *Schedule* to open the *WSPR Band Hopping* window, and select
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the bands you wish to use at each time of day.
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image::images/band_hopping.png[align="center",alt="Band Hopping"]
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- Band-switching occurs after each 2-minute interval. Preferred bands
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are identified with time slots in a repeating 20-minute cycle,
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according to the following table:
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[width="73%",cols="11,10*^",align="center",options="header"]
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|======================================================================
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|*Band:* |160 | 80 | 60 | 40 | 30 | 20 | 17 | 15 | 12 | 10
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|*UTC minute:* | 00 | 02 | 04 | 06 | 08 | 10 | 12 | 14 | 16 | 18
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| | 20 | 22 | 24 | 26 | 28 | 30 | 32 | 34 | 36 | 38
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| | 40 | 42 | 44 | 46 | 48 | 50 | 52 | 54 | 56 | 58
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|======================================================================
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- If the preferred band is not active according to your band-hopping
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schedule, a band will be selected at random from among the active
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bands.
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- If the box labeled *Tune* is checked for a particular band, _WSJT-X_
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transmits an unmodulated carrier for several seconds just after
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switching to that band and before the normal Rx or Tx period
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starts. This feature can be used to activate an automatic antenna
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tuner (ATU) to tune a multi-band antenna to the newly selected band.
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- Depending on your station and antenna setup, band changes might
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require other switching besides retuning your radio. To make this
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possible in an automated way, whenever _WSJT-X_ executes a successful
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band-change command to a CAT-controlled radio, it looks for a file
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named +user_hardware.bat+, +user_hardware.cmd+, +user_hardware.exe+,
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or +user_hardware+ in the working directory. If one of these is found,
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_WSJT-X_ tries to execute the command
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user_hardware nnn
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- In the above command +nnn+ is the band-designation wavelength in
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meters. You will need to write your own program, script, or batch file
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to do the necessary switching at your station.
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