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ER101, TX 2-Tone Generator allowed in SSB modes: The 2-tone
generator is only applicable in SSB modes.
ER102, Turn up Monitor Level for TX 2-Tone Generator to be
audible: In SSB modes with the 2-tone generator turned on, if you
tap XMIT and can't hear the tones, adjust the monitor level.
ER103, Transverter band not configured. Use XVTR menu
entries: The transverter band presently selected has not yet been
configured. The menu has several XVTR menu entries for
transverter band configuration. See transverter setup information.
ER104, No recorded message: The selected message (M1..M4), in
the current bank (1 or 2) has not been recorded in the current
mode.
ER105, Operation requires sub RX to be ON: The most recent
control operation only applies if the sub receiver is turned on.
ER106, Operation requires DUAL PAN to be OFF: The most recent
control operation only applies to single-panadapter mode. Tap
<DISPLAY> then <PAN = n> one or to times to switch to
panadapter A.
ER107, Operation requires K4D or K4HD: The most recent control
operation only applies to the K4D and K4HD models.
ER150, K4FP missing: The front panel module was not detected on
power-up, which may result in multiple issues with basic
functionality. This may be due to a dislodged or intermittent USB
cable or other hardware problem. Contact Elecraft for possible
troubleshooting instructions.