Ptt Tab - microHAM MK2R Manual

The PTT tab provides independent PTT configurations for each radio.
PTT INPUTS
MK2R has ten PTT sources:
PTT generated by the logging program on the virtual COM port RTS or DTR
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nd
2 PTT generated by a second application on the virtual COM port RTS or DTR
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PTT generated on the DTR line of the FSK channel if the PTT box is checked.
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PTT generated on the DTR line of the 2
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NOTE: The PTT and FSK channels generate the same Serial PTT input (they are logically
paralleled),
The foot switch attached to the MK2R rear panel RCA jacks.
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MK2R can be configured to recognize one or two foot switches on the SO2R tab. If MK2R is
configured for one foot switch, both inputs will operate in parallel.
The microphone PTT switch of the microphone connected to the RJ45 MIC jack.
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This input is hardwired to the FS1 input of the MK2R.
PTT on the LPT port.
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LPT PTT will activate the radio with transmit focus
WinKey generated PTT.
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Depending on the mode used by the logging program, WinKeyer2 can generate separate PTT
signals for each radio or a single PTT that can be applied to the radio with transmit focus.
NOTE: when WinKey2 is controlled by a logging program, the program configuration determines whether
WinKey generates a single PTT output or separate PTT for each radio.
Transceiver PTT status inputs (PTTIN) for sensing PTT status of the transceiver.
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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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PTT TAB

nd
FSK channel if the PTT box is checked.
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