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Hi,

???? Windows Update is not an issue here.? The COM port works fine.? Scanning through 8 frequencies works well.? VARA TUNE puts the radio into Tx mode.? The waterfall works fine.? But when the VARA HF modem starts, the USB Keyboard no longer works.? When VARA HF is closed, the keyboard works.? But only on the Jupiter radio configuration.? I did a complete delete and reinstall of RMS Trimode and VARA HF.

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73,
????? Rory Griffin W4RJG

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This sounds like RFI (Radio Frequency Interference) -- transmit RF is being picked up by the keyboard cable and blocking the keyboard input until you stop transmitting.??

What kind of TX antenna are you using?? How far from the operating position is it?

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Have you used Jtsync or some other clock syncing program?

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On Tue, Feb 11, 2025, 7:49?AM Rory Griffin, W4RJG via <w4rjg=[email protected]> wrote:

Hi,

???? Windows Update is not an issue here.? The COM port works fine.? Scanning through 8 frequencies works well.? VARA TUNE puts the radio into Tx mode.? The waterfall works fine.? But when the VARA HF modem starts, the USB Keyboard no longer works.? When VARA HF is closed, the keyboard works.? But only on the Jupiter radio configuration.? I did a complete delete and reinstall of RMS Trimode and VARA HF.

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?

Again, this is RFI !? Transmit RF is getting back into the shack and cables.??? The VARA "Tune" button produces a single RF tone like keydown CW.? When this single RF frequency is picked up by wiring in the shack and gets into the USB port,? diode-detection? by circuitry in the USB port produces only a single DC voltage.? Nothing much happens.? This will be true of any mode that generates only one tone at a time such as RTTY, MFSK, analog SSTV, etc.

When you actually transmit with VARA, you are generating a complex multi-tone signal with at least 11 simultaneous audio tones which create multiple RF signals side-by-side.? When this complex RF mix gets diode-detected by the USB port's electronics, you get multiple audio frequencies,?? as the various RF freqs beat against each other.?? When these AC signals are? fed into the USB port routines, USB data flows are screwed up and locks up the port until the RF goes away.

Again, what kind of antenna are you using, and how close to the shack is it????