Simple PTT plugin
Introduction
This plugin controls switchover between a Rx (Device source) and Tx (Device sink). It has no other controls than an adjustable delay from Rx to Tx and back to Rx. Because of its simplicity it can also serve as a model to build other feature plugins.
Interface
1: Start/Stop plugin
This button starts or stops the plugin
2: PTT button
Click to switch from Rx to Tx and again to switch back to Rx. When in Tx mode the button is lit.
3: Status indicator
This LED type display shows the current PTT status:
- **Green**: Rx runs
- **Red**: Tx runs
- **Grey**: None active (transient)
4: Vox control
4.1: Activate vox system
Toggle this switch to activate or de-activate vox control. When activated the audio input level is monitored and appears in (4.5) and if the level exceeds the level set by (4.3) and displayed in (4.4) then the vox button turns green until vox goes off after the hold period (4.6). The vox system controls the PTT only if the vox PTT enable checkbox is checked (4.2). Thus you can set the appropriate level (4.3) before engaging PTT control.
Right click on this button to open the audio input device selection dialog.
4.2: Enable PTT control
Check this box to enable PTT control by the vox system.
4.3: Vox threshold level
Use this button to adjust the vox threshold level in power dB (0 dB = full range)
4.4: Vox threshold display
This is the value set by (4.3) in dB.
4.5: Audio input level
This is the audio input level in dB displayed when the vox system is active (4.1)
4.6: Vox hold period
The vox is held active for this amount of time in milliseconds after the audio input power goes below the threshold level (4.3)
5: Refresh list of devices
Use this button to refresh the list of devices (5) and (6)
6: Select Rx device set
Use this combo to select which Rx device is controlled
7: Select Tx device set
Use this combo to select which Tx device is controlled
8: Transistion delay from Rx to Tx
Value in milliseconds between Rx stop and Tx start
9: Transistion delay from Tx to Rx
Value in milliseconds between Tx stop and Rx start