BTS Master MT8221B and MT8222B : Instrument Overview : Text Entry
  
Text Entry
When entering text (as when saving a measurement) the submenu key for Text Entry displays the characters (alphabet, hyphen, and underscore) in 6 letters per key (Refer to Figure: Text Entry Menu – Selecting Characters). Characters can be entered by using the rotary knob or by using the submenu keys. Refer to Figure: Text Entry Menu – Lower Case, Figure: Text Entry Menu – Upper Case and Figure: Text Entry Menu – Selecting Characters.
The rotary knob scrolls through the characters in a pop‑up window and is pressed to select each character in sequence.
Alternatively, press the a b c / d e f submenu key (for example) to open another submenu with a separate key for each of these letters. The menu returns to the complete character set after each individual letter is entered.
Use the arrow keys to navigate within a name or character string. Use the Shift key for capital letters. Press the Enter key or the rotary knob to finalize a text entry.
 
Text Entry Menu – Lower Case
 
Text Entry Menu – Upper Case
 
Text Entry Menu – Selecting Characters