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Key clicks reported in QSK CW mode with an external amplifier: This
may be due to a slow T/R switching by your amp. To avoid transmitting
with key clicks, increase the parameter value of MENU:TX DLY, Key Out
to RF Out. Many amplifiers can also cause key clicks by returning slowly
to receive mode; see MENU:TX DLY Unkey to Receive.
Relay heard switching during keying: The Carrier Operated Relay
(COR), which protects the receiver from nearby transmitters, may be
getting triggered by your own transmit signal. See below.
Carrier Operated Relay (COR) activates during keying: This may occur
if you're using a receive antenna that is in very close proximity to your
transmit antenna. Separate the antennas or reduce transmit power.
NOTE: ATU antenna inputs used as receive antenna sources are more
susceptible to COR activation than the RX ANT IN1 and RX ANT IN2/
XVTR IN jacks. Use the latter when possible.
TX Icon shows "TX Inh" or "TX Test": The TX icon changes to "TX Inh" if
transmit is inhibited by an external logic signal (see MENU:TX Inhibit
Mode). It changes to "TX Test" if TEST mode is in effect
([TEST] switch).
TX LED on all the time: This could indicate that PTT is being held on by
external equipment. Verify that keying via RTS or DTR is not enabled
(see Serial I/O menu entries). Try disconnecting everything connected
to the ACC and RS232 connectors. Also check VOX gain (unplug mic if
necessary). If this does not turn off the TX LED, turn the K4 off for
several seconds, then back on.
ERROR MESSAGES
The following error messages may appear in response to control
changes or other events. Suggested corrective actions are provided.
N/A or Not Applicable: The control being used does not apply in the
present context.
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