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PTT: The virtual port used for FSK can also support PTT (required by MMTTY). When you use MMTTY,
select the PTT box and RTS will used for PTT. Do not use the FSK port for any other function.
Invert: Some transceivers lack the ability to set the sense of the FSK input. If you cannot set the proper
sense, check the invert box. This is normally necessary only with the TenTec Omni V, Omni VI and
Kenwood TS-940.
Strict bps: Some programs rely on the the serial port UART for proper PTT timing; they drop PTT (unkey)
when the FSK port buffer is empty. With virtual ports, this may causes PTT to drop before the contents of a
message (macro) are complete. 'Strict bps' disables the virtual port buffering and transmits one character
at a time to the output. Due to the additional overhead, FSK output will be slightly slower when strict bps is
enabled but operation will be more reliable.
To test FSK operation from the computer to the radio, click the Test button with no port assigned or the
port closed. The Test button will generate "RY" two times.
NOTE: Select RADIO1 or RADIO2 (as appropriate) with the buttons on MK2R when testing.
CW PORT
By its very nature, USB is not well suited to transfer the real time events required for CW keying. In
addition to the latency inherent in the USB protocols, there are also latencies caused by computer CPU
load, internal Windows message processing (inter-process communication) and data flow from another
peripherals sharing same the USB hub. This can result in transmitted characters that are garbled. To
minimize these unwanted operating system effects Router uses a specially developed oversampling and
prediction algorithm to assure the smoothest possible transfer of control signal events over USB. Using this
principle, CW keying in the Router is, in most cases, usable up to 50 WPM if the application generates
keying signals accurately and does not consume 100% of CPU time at the highest priority class.
Router allows assigning a virtual serial port for software CW using DTR or RTS signals. DTR* and RTS*
are identical to DTR/RTS except that the output is inhibited for one second after the COM port is opened.
RTS*/DTR* should only be used with programs that cause unwanted key-ups during startup.
TIP: More applications use DTR for CW than RTS.
When an application opens the COM port (usually at start-up), Router will indicate the channel is open.
The state of the CW channel is indicated by a red
arrow. If port is opened, it does not mean that it is
properly configured. The red arrow will light in time with
the transmitted CW when the port is properly
configured.
To test CW operation, click on the Test button with no port assigned or the port closed.
NOTE: Select RADIO1 or RADIO2 (as needed) with the buttons on MK2R when testing.
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