IBM 3151 User Manual page 49

Ascii display station, for the cartridge to emulate ibm and dec' terminals
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Step 11. Adjusting the Audible Alarm Sound
a
b
To increase the sound of the audible alarm:
Press and hold
To decrease the sound of the audible alarm:
Press and hold
Then press
n
/~
o
OJCIJ
001£)
OCD
Repeat these steps until the alarm is set to a comfortable sound
level.
2-24
User's Guide for the Cartridge
to
Emulate IBM and DEC Terminals

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