Elecraft KRC2ACC - Manual (Page 5)

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F 3 Holding this button will cause a Morse ‘I’ to be announced and the KRC2 to enter
shift-3 condition. Tapping a button will then cause one of the functions listed below
to be performed.
F 1 Decrease KRC2 selected antenna terminal.
F 2 Increase KRC2 selected antenna terminal.
F 3 Announce current KRC2 antenna selection.
F 4 Announce KRC2 firmware version.
Holding F 3 instead of tapping a key will again announce a Morse ‘I’, but will cancel
the shift-3 condition.
F 4 Holding this button will cause a Morse ‘I’ to be announced and the KRC2 to enter
shift-4 condition. Tapping a button will then cause one of the functions listed below
to be performed.
F 1 Decrease KRC2 CW announcement speed by about 3 wpm.
F 2 Increase KRC2 CW announcement speed by about 3 wpm.
F 3 Increase CW tone frequency (500Hz, 600 Hz, 750 Hz, 1000 Hz).
F 4 Increase Announcement verbosity level.
Holding F 4 instead of tapping a key will again announce a Morse ‘I’, but will cancel
the shift-4 condition.
The F 3 F 1 and F 3 F 2 functions change the output terminal for the relay drivers up or down in
single band increments. When the highest band is selected, the next F 3 F 2 sequence will cause
the drivers to go to the 160m setting. Conversely, when the lowest band is selected, the next usage
of the
F 3 F 2 function causes the drivers to go to the highest band. The band map follows the
values indicated in Table 5 of the KRC2 Assembly and Operations Manual, which places the 60m
band above the 10m band. Thus the sequence will be:
…12m<->10m<->60m<->160m<->80m<->40m… While the selected driver is different from the
current band indicated by the transceiver, the green LED will flash between dim and bright states.
The XVT drivers do not participate in the sequence, and when the transceiver selects a transverter
these buttons will not change the driver selection.
KRC2 Accessibility Configuration Jumper Settings
The KRC2’s W1-W8 jumpers should be set for K2 operation. Thus W1, W2 and W3 should be
removed in order to allow the K2’s AuxBus to indicate band settings to the KRC2. These jumpers
may also be set for Serial Port Mode, which disables AuxBus processing in the KRC2. This
setting may be preferred since AuxBus processing tends to disturb the timing of the KRC2’s
Morse code characters. With this setting, the KRC2 will automatically set the antenna selector
outputs based on serial port frequency information.
The W6 jumper should also be installed for normal use to enable the K2 to automatically report
changes. If the K2/KRC2 is used with a computer, you may want to remove this jumper since the
automatic status messages may interfere with the operation of software on the computer.