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FRStack and Remote PTT
FRStack does support remote PTT since FRStack is SmartLink aware.
Mark provided the information required to use local foot switch.
For the FRStack feature to control MOX via a serial port:
- MOX Com Port Selection and MOX mode; Toggle or Hold
You can choose to use
- DTR DSR pair or
- RTS CTS pair
You select which pair on the operations tab.
When operating SmartSDR Remotely you do not have access to the PPT hardware on the Radio. The MOX COM Port feature allows you to use a hand or foot switch to key the transmitter using your remote PC's serial port (or USB port using an inexpensive USB to RS232 Converter).
This feature has two modes;
Hold and Toggle. Hold mode keys the transmitter when the switch is closed and un-keys the transmitter when the switch opens. Toggle mode keys the transmitter on the switch's transition from open to closed and continues to transmit when the switch opens. A second switch transition from open to closed un-keys the transmitter.
Using a standard RS232 serial port; the switch contacts should be connected as follows:
Switch shield / ground to DB9 Ground Pin 5
- Switch PPT line to DB9 DSR Pin 6. Connect a 2K resistor between DB9 DSR Pin 6 and DTR Pin 4
- Switch PPT line to DB9 CTS Pin 8. Connect a 2K resistor between DB9 CTS Pin 8 and RTS Pin 7
*** I think you will find the resistor value (pull up) is not very critical. Anything from about 1K to 5K should work ***
Note: When you enable this feature (or start FRStack with this feature enabled) without the resistor in place between the DTR and DSR pins of the selected COM Port OR the hand or foot switch in the closed state; FRStack will report an error and disable the feature.
Here is the example using the CTS and RTS pair of pins.
To setup FRStack, go to View / Options.
Make sure you have plugged in your USB/RS232 adapter into your computer so that it is in Device Manager and you can find the correct number. In my example, it is COM13.
This is CTS Low and mode Hold for a normal foot switch. You can change it to Toggle if you want to click on and click off.
Now, if you are remote and are using SmartSDR on your PC you can just plug your USB/RS232 adapter into your USB port and operate with a normal foot switch or hand switch.
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