NOTE:

To use VARA FM with a SignaLink interface and a handheld transceiver (HT), you need to connect the HT to the SignaLink via a suitable cable, configure the SignaLink jumpers for the specific HT model, set up your communication software (like Winlink) to use VARA FM mode, and then select the appropriate frequency and callsign to initiate a communication session, ensuring proper audio levels on both the HT and computer interface

VARA FM - SignaLink - HT procedures

Open Winlink VARA FM Session

VARA FM Session window

Click on <Settings> then <VARA TNC Setup>

Virtual TNC host : 127.0.0.1

Virtual TNC Command : 8300 (Data port 8100)

VARA FM Modem Location : C:\VARA FM\Varafm.exe (wherever the file is located)

Check auto launch VARA FM TNC

Check Show VARA FM TNC

Automatic Calling - Autoconnect time : Disabled

Uncheck Automatically call if there's outgoing messages

Click <Update>

Session will restart and the VARA FM TNC window opens also

VARA FM window (Signalink)

Click on <Settings> and then <VARA Setup>

FM System - Wide

TCP Ports - Command - 8300 - Data - 8301 - KISS - 8100

VARA License(s) Enter Call Sign and Registration Key

Allow VARA check for updates - Checked

KISS Interface - Checked

SysLog - Unchecked

Sound Card

Device Input - Signalink

Device Output - Signalink

Device Level - about -5 db

PTT

Select VOX

VARA FM Session window - (continue)

Click on <Channel Selection> and choose a station close to your location

Ex: Connection - Direct - KL7RI-10 - Freq - 145.610

Click <Start> 

Troubleshooting:

Audio quality issues: If you experience poor audio quality, check your audio levels on both the HT and the communication software. 

No connection: Verify that the correct frequency and callsign are entered, and check if the other station is active on the same VARA FM frequency. 

Important Considerations:

Signal Strength:

Ensure you have a good signal between your HT and the repeater or other station you are trying to communicate with. 

Frequency Selection:

Double-check the frequency settings on both your HT and the software to match the desired VARA FM channel. 

Power Level:

Depending on your situation, you may need to adjust the power level on your HT to optimize the signal strength. 

Audio Level Adjustment:

Access the audio settings within your communication software. 

While transmitting a test signal on your HT, adjust the microphone gain on both the HT and the SignaLink to achieve a suitable signal level on the software's VU meter, ideally aiming for a mid-range level. 

Similarly, adjust the speaker volume on your HT and the SignaLink to ensure a clear received audio level.