April 30th, 2018: For information about this topic see Wikipedia.
The implementation in SDR Console supports Trunk Tracking and Voice Following with a single wide-band radio such as the Airspy R2 or SDRplay RSP1A. Receiver 1 (RX1) is tuned to the control frequency, up to five receivers (RX 2 ... RX6) are tuned to the voice channels.
This implementation uses DSDPlus for the controller, monitors the output (*.traffic files) and tunes the voice receivers which interface with 3rd-party decoding software via a virtual audio cable (VAC).
Note: You may need a DSDPlus Fast Lane release for controller support.
From the ribbon bar, View pane, More Options panel press Select then enable Trunk Voice Following. After a restart a new entry is shown in the More Options panel.
Receiver 1 (RX1) is tuned to the control frequency:
DSDPlus is run in control/rest decoder mode (-rc argument), active voice channel Frequency / Talk Group / Radio ID shown by empty .traffic files where the filename format contains this metadata. The .traffic files are created in the DSDPlus executable folder, for example:
where Frequency = 773.381250 MHz, Talk Group = 52544 and Radio ID = 1842743.
Up to 5 receivers (RX2 to RX6) are set the voice channel with the output sent throup a VAC to a decoder. When a file is deleted the demodulation stops. Examples of decoders are: Dgo2SIGNALS from go2DECODE, W-Code from WAVECOM or DSDPlus.
Select Trunk Voice Following from the ribbon bar (see above). The steps you must follow are:
Use DSDPlus to monitor the controller channel. For your convenience you can configure and start DSDPlus here. Console receiver RX1 is reserved for the controller. All DSDPlus options are described in the file DSDPlus.txt in the docs subfolder of the DSDPlus installation.
Press Preview to view the .bat file which runs when you press Start. For example:
: Start in the DSDPlus folder
CHDIR /D "E:\Utilities\DSDPlus"
DSDPlus.exe -rc -i2m -v2 -f1 -Pmp3 -wsl453.1034 -wss100.256 -wel0.1 -weh15 -wcl0.445 -wes200.500 -wcl0.455 -wch15 >>CC.log -_1 -E -e -t
In the Decoder page configure the Console receivers which send the output via a virtual audio cable to your decoder, for example Dgo2SIGNALS from go2DECODE or DSDPlus. The receiver frequencies are set by the monitor (below). Receivers RX2 ... are reserved for the decoders. Do not change the receiver options, they are updated when the decoder frequency changes.
Decoding must be enabled!
Monitors the traffic files created by the DSDPlus controller:
The monitor must be started, otherwise there will be no decoding!
If a talk group is selected then it will take priority in decoder 1. If decoder 1 isrunning on another talk group / frequency it will be switched to the priority talk group's frequency when the talk group is active.
https://www.dsdplus.com/ for Fast Lane releases see the information below.
https://www.procitec.de/en this is excellent fully-featured commerical software.
Note: SDR-Radio.com Ltd. is not connected with the DSDPlus development team, the information below is for your benefit.
Early access to features is being offered through the DSD+ Fast Lane program.
Fast Lane updates are expected to be released about once per month.
Some Fast Lane updates WILL have issues/bugs. That is the nature of alpha software.
Fully tested public releases will continue to be released, approximately every 6 months.
In light of the extra workload the Fast Lane program will create, the DSD+ team is asking Fast Laners for:
Donations above these amounts are welcomed, but it's up to you. We're not looking to get rich here. Funds will be used for things like needed hardware upgrades.
Funds can be sent our Paypal account firstname.lastname@example.org.
Please include a comment that specifies the email address that your Fast Lane updates should be sent to.
NOTE: IF YOU DO NOT INCLUDE A COMMENT, PAYPAL DOES NOT SEND US A NOTIFICATION. THIS *WILL* DELAY YOUR FIRST FAST LANE UPDATE."