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PTT TAB
The PTT tab provides independent PTT configurations for each radio.
PTT INPUTS
MK2R has several PTT inputs available for each radio:
●
PTT generated by the logging program on the virtual COM port RTS or DTR
●
2
nd
PTT generated by a second application on the virtual COM port RTS or DTR
Both PTT and 2
nd
PTT generate the same Serial PTT input (they are logically in parallel).
●
The foot switch attached to the MK2R rear panel RCA jacks.
MK2R can be configured to recognize one or two foot switches on the SO2R tab. If MK2R is
configured for one foot switch, both foot switch inputs will operate in parallel.
●
The microphone PTT switch of the microphone connected to the RJ45 MIC jack.
This input is hardwired to the FS1 input of the MK2R.
●
WinKey generated PTT.
WinKeyer2 generates separate PTT signals for each radio. Note: when WinKey2 is controlled
by a logging program, the program configuration determines whether WinKey generates PTT.
●
Transceiver PTT status inputs (PTTIN1, PTTIN2) for sensing PTT status of the transceiver.
To use VOX or software command for transmit/receive switching with power amplifiers
connected to the MK2R PAPTT outputs, the PTT output from RADIO1 should be connected to
PTTIN1 and the PTT output from RADIO2 should be connected to PTTIN2. Closing PTTIN will
immediately cause PAPTT and LNA PTT to close if the are enabled.
WARNING: The use of VOX or software command for transmit/receive switching is not
recommended and will likely destroy any low noise preamplifier inserted in the RF line.
●
Virtual PTT generated by MK2R based on CW signal presence.
MK2R generates "virtual" PTT from CW outputs when necessary for controlling transmit focus,
PAPTT, and LNA PTT if the software does not generate PTT. The leading edge of this "virtual
PTT" is the same as the leading edge of the CW signal. The tail can be extended up to 2.5
seconds (using the WinKey PTT tail parameter).
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