The 60 Meter band, in many jurisdictions, has several special requirements for band frequency limits and Transmit Bandwidth limits. If you are getting "NO TX" or "Transmit Inhibit" warnings on 60 Meters, you may have something set improperly:
Primary Reasons for TX Inhibit on 60 Meters Operation:
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TX Bandwidth is too wide for SSB or Digital Signals.
(100-2900 should be OK. But NO WIDER)
In some locations, 60 Meters is authorized only on certain "Fixed" or "Channelized" frequencies that are limited to a maximum bandwidth of 2800 Hz (2.8 KHz). Primarily this is the US and the UK.
In normal operations, this means you cannot use a "Low-Cut" no lower than 100 Hz and a "High-Cut" no higher than 2900 Hz.
If your "High-Cut" is set higher than 2900 Hz, then your radio will be "Out Of Band" and will not transmit.
If your "Low-Cut" is set below 100 Hz, then your radio will be "out of band" and will not transmit.
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DO NOT Use "Fake-It" or "Rig" for "SPLITS on 60 Meters:
If your WSJT-X / JTDX or other Digital program is set for "Fake-it" or "Rig," it will shift the dial frequency up or down when you try to transmit, resulting in an "out-of-band" interlock condition, which will trigger an "Out of Band" warning and inhibit transmission.
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Transmit VFO is on the wrong "Carrier Frequency:"
Check your authorized frequencies and be sure you are on the right "channel" center frequency.
If you are off frequency even by 100 Hz up or down, you may trigger an out of band warning and TX Inhibit.
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XIT or RIT is turned ON, shifting the TX Frequency.
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Not having the slice TX Button Enabled.
Be sure that your intended Slice is enabled as the "Active TX Slice" by tapping the TX Button for the slice. Otherwise you will get a "NO TX" Warning.
For more information, please refer to this article:
Why Does My Radio Say I Am "Out Of Band" When My Frequency Readout Says I Am Not? – FlexRadio