Each of 0-9 numeric keys and the period key is assigned three characters. For example,
the 7 key is assigned A, B, and C. One of the three assigned characters can be assigned
to these keys using the M1 alphabet input procedure. Note that the trigger switch function
(default) or no function should be assigned to the M1 or M2 key used to program the keys.
Appendix C
Alphabet Input Procedure
Figure C-1. PDT 1100 Keypad
GHI
DEF
ABC
MNO
PQR
JKL
STU
YZSp
VWX
+-*
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