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ER65, Invalid transverter setup or freq. request: To use a transverter
band, it must be configured in the menu for the desired R.F. and I.F.,
and its mode must not be OFF. The other way this error message can
appear is if a frequency is specified that is outside the usable I.F. range
(-1 to +4 MHz in relation to the I.F. specified in the menu).
ER66, Turn VOX on to enable RF output when keying in CW mode: In
CW mode, if VOX is off, you'll hear your sidetone, and the KEY OUT signal
will be active, but there will be no RF output. This makes VOX useful for
testing amplifier keying, etc., with zero drive. The error message serves
as a reminder in case you turn VOX off unintentionally.
ER67-70, Keying input held low at power-up: These alerts let you
know if you have a persistent "stuck key" condition when the K4 is
turned on. The four alerts cover KEY IN, DOT, DASH, and PTT
respectively. Disconnect any connected keying devices and clear the
message. If this corrects the problem, examine the keying device for
shorts to ground.
ER71, Receiver is Squelched: This alert appears as a reminder when you
adjust AF gain while the associated receiver is squelched. Squelch can be
disabled for non-FM modes using the RX All-Mode Squelch menu entry.
ER100, 10 MHz REF IN signal too low; using internal TCXO: An external
10 MHz reference input was detected that is too low in amplitude to
ensure stability. Nominal requirement is +10 dBm.
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