RTTY FSK

the FSK connection

Transceivers capable of FSK operation generally provide a TTL input (voltage levels +5 VDC, 0 VDC) that controls the switching between Mark and Space frequency generation:

* Some transceivers provide a menu setting that reverses the meaning of the FSK Input Signal voltage.

WinWarbler can be configured to generate the FSK Input Signall by on the PTT serial port's TxD pin or on the TxD, RTS, or DTR pin of any available serial port. All of these pins employ RS-232 voltage levels (+12 VDC, -12 VDC), so an external level converter is required:

Configuring WinWarbler for FSK operation

WinWarbler can be configured to generate the FSK signal on the TxD, RTS, or DTR pins of any available serial port. If you are using a USB-to-serial-port adapter and will be configuring WinWarbler to generate the FSK signal on the TxD pin, then this USB-to-serial-port adapter must support 5-bit operation at 45 baud, and you must configure the MMTTY engine to transmit characters at a rate that the USB-to-serial-port adapter can handle:

  1. set the Main window's Operating Mode panel is set to RTTY

  2. on the Configuration window's RTTY tab,

    1. check the Enabled box

    2. click the MMTTY Setup button

  3. on the MMTTY Setup window's Misc tab

    1. set the Tx port panel to COM-TxD (FSK)

    2. click the USB button

  4. in the USB Port Option window, select the C: Limiting Speed option and click the OK button to close the window

  5. close the MMTTY Setup window by click the OK button in its lower-right corner

If you are using a USB-to-serial-port adaptor and will be configuring WinWarbler to generate the FSK signal on the RTS or DTR pins, then support for 5-bit operation at 45 baud is not required.

To use the PTT serial port's TxD pin, open the Config window's PTT tab and note the serial port selected in the PTT panel's Port tab. Select the Config window's RTTY tab, and in the Modulation and transceiver mode panel's FSK section,

If necessary, you can change the COM port number that Windows assigns to a USB-to-serial-port adaptor.

For more flexibility in serial port selection or to utilize a USB-to-serial-port adaptor that does not support 5-bit operation at 45 baud, open the Config window's RTTY tab, and in the Modulation and transceiver mode panel's FSK section,

When the Main window's Operating Mode panel is set to RTTY with the Enabled box checked on the Config window's RTTY tab, an EXTFSK icon will appear in the Windows Task Bar along the bottom of your monitor. Click this EXTFSK icon to open the EXTFSK window; in this window,

The EXTFSK icon will appear in the Windows Task Bar whenever you operate in soundcard RTTY mode, but it will remember the settings you've established, so subsequently opening the ESTFSK window is unnecessary.


Setting up CW, Phone, PSK, and RTTY Operation

Getting Started with CW, Phone, PSK, and RTTY Operation

Getting Started with DXLab

FSKConnection (last edited 2014-12-29 05:20:04 by AA6YQ)