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NanoVNA 4 version 1.0.?
I had all slots filled with band segments mainly SSB 5.3305 - 29.7MHz, 3.8 - 4MHz, 7.175 - 7.3MHz, etc. I decided to verify the calibration, I set the stimulation to 7.025 - 7.3MHz for both CW and SSB, then performed the calibration and the slot now shows cw 800Hz - 800Hz. What have I done wrong?

Thank you, 73,
John W7OTD

When you say you "set the stimulation to 7.025 - 7.3MHz for both CW and
SSB", did you press the "CW Freq" menu item as part of this action? And
did you 'save' the calibration to the slot?
Typically when we say we are going to "verify a calibration", we just
attach the 'open', 'short', and 'load' standards in turn, and look a the
display to verify that they each show the correct values, which are a point
a the far right of the Smith chart, a point at the far left, and a point in
the center (respectively).

Thank you Stan, I did not hit the CW frequency. It is a showing up on its own while saving to a location as 800Hz.

Hmmm... sorry, haven't seen this before. Looks like something hijacked
your cal to be done at a cw freq of 800, rather than the range you wanted.
I would just reset the cal and do it again.

On Stop frequency input you use x1 (input as Hz, not in MHz), so input result 7.3Hz, NanoVNA not allow set this value and set minimum 800Hz
Start value less then 800Hz, so and Start value also set to 800Hz
Start value = Stop value, so NanoVNA switch to CW mode

PS use correct input

Thank you DiSlord for helping realize my mistake. I was inputing the stimulus frequecy and instead of pressing the M, I was pressing the x1.

73,
John - W7OTD