WinWarbler PSK Broadband Decode

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WinWarbler can deploy  47 monitor channels across the audio band from 100 hertz to 3500 hertz, each configured to search for PSK31, PSK63, or PSK125 signals within its 72 hertz range. If the Main window's Mode is set to PSK31, then the monitor channels search for PSK31 signals; if the Main window's Mode is set to PSK63 or PSK125, then the monitor channels search for PSK63 or PSK125 signals respectively. When a monitor channel's signal quality exceeds the specified squelch level for a specified number of samples, that monitor channel is considered locked. WinWarbler decodes and records the signals of all locked channels, extracting callsign data, and optionally denoting the locations of these locked channels above the waterfall display with channel markers: solid triangles whose color is adjustable. Channel markers appear if the Channel Monitor window is enabled or if the Channel Monitor's always show monitor channel markers box is checked.

Allowing the mouse cursor to hover over a channel marker results in a popup display of the callsign data extracted from the associated monitor channel, in the form  receiving_callsign de transmitting_callsign. If either the receiving or transmitting callsign has not yet been captured, a ? appears in its place; if neither callsign has been captured, the popup display shows a single ?. Clicking on a channel marker sets a receive pane to the monitor channel's frequency and initializes it with the captured text and extracted transmitting callsign. The receive pane chosen is specified by QSO control on the Main window's Receive panel or, if the QSO control does not specify a receive pane, the currently active receive pane is used.

When Broadband Decoding is enabled, WinWarbler displays the resizable Stations Heard window. Transmitting callsigns extracted from locked channels are listed in this window; each entry on this list contains the following information:

Whereas the signal quality is a measure of the signal's phase noise, the signal strength is a measure of its audio amplitude compared to other signals; due to automatic gain control action in your receiver, this may not accurately represent the amplitude of the received RF. 

If the transmitting callsign or QSO partner in a Stations Heard entry matches the callsign in the Search textbox at the top of the Stations Heard window, then that entry will be preceded by a red asterisk. If the display decoded text option is enabled, a box labeled DS will be present to the right of the Search textbox; if this box is checked, the the entry will be preceded by a red asterisk if the contents of the search textbox (which could contain a location or grid square, not just a callsign) are found in the entry's decoded data. Otherwise,  if the QSO partner in an entry matches your callsign, then that entry will be preceded by a green asterisk; this alerts you to calling stations anywhere across the band. 

Entries in the Stations Heard window can be sorted by any column - click on the column header to sort in ascending order; click again to sort in descending order. Clicking on an entry in the Stations Heard list selects that entry.  Right-clicking an entry in the Stations Heard list selects that entry and displays a menu that lets you, delete the currently-selected entry, delete the entire Stations Heard list, and enable/disable the Channel Monitor. You can also delete the currently-selected entry by striking the Delete key.

Double-clicking on a list entry in the Stations Heard window sets a receive pane to that entry's frequency and initializes the pane with the captured transmitting callsign and recorded text, if any. The receive pane is specified by QSO control on the Main window's Receive panel or, if the QSO control does not specify a receive pane, the currently active receive pane is used.  Depressing the Shift key while double-clicking a list entry in the Stations Heard window also sets the transmit frequency to that entry's frequency. 

If Commander is running, checking the Transmit panel's split box will place the transceiver in split mode, and when transmitting set the transceiver's VFO B so that transmission occurs on the optimal audio offset specified in the optimal offset sub-panel of the Receiver panel on the Config screen's PSK tab. This technique is helpful when using Broadband Decoding as it allows transmission on the optimal offset without changing the receive frequency.

WinWarbler can be configured to send decoded transmitting callsigns to SpotCollector as local spots; the mode (PSK31, PSK63, or PSK125) and relative signal strength are included in the spot notes.

If Commander is running, clicking the Stations Heard window's Opt button will direct Commander to optimize your transceiver's frequency so that the audio offset frequency of current receive channel moves to the value specified in the optimal offset sub-panel of the Receiver panel on the Config screen's PSK tab. However, the resulting change in receive frequency will shift the locations of PSK signals within the transceiver's bandpass; it takes time for the Broadband Decoding mechanism to re-acquire these signals. An alternative approach is to check the split box  on the Main window's Transmit panel. This will place the transceiver in split mode, and when transmitting set the transceiver's VFO B so that transmission occurs on the optimal audio offset specified in the optimal offset sub-panel of the Receiver panel on the Config screen's PSK tab -- without changing the receive frequency.

If you minimize or close the Stations Heard window, you can direct WinWarbler to display it by

WinWarbler can optionally display the resizable Channel Monitor window, which displays the following information for each monitor channel:

The state of each monitor channel - unlocked, locking, locked, and unlocking - is indicated by the color of the font used to render its channel number in the Channel Monitor window.

Entries in the Channel Monitor window can be sorted by any column - click on the column header to sort in ascending order; click again to sort in descending order. Right-clicking the Stations Heard list displays a menu that lets you reset the list.

Double-clicking on a monitor channel entry in the Channel Monitor window sets a receive pane to that channel's frequency and initializes the pane with the captured transmitting _callsign and recorded text, if any. The receive pane is specified by QSO control on the Main window's Receive panel or, if the QSO control does not specify a receive pane, the currently active receive pane is used. Depressing the Shift key while double-clicking a list entry in the Channel Monitor window also sets the transmit frequency to that entry's frequency

To enable broadband decoding, check the BBD box on the Main window's Receive panel or the Enabled box on the Config window's PSK Broadband Decode tab. To display the Channel Monitor window, check the Display Channel Monitor box on the Config window's PSK Broadband Decode or check the Stations Heard window's Channel Monitor box. 

The Config window's PSK Broadband Decode tab also provides