IBM 5114 Maintenance Information Manual page 123

p.s: Microsecond.
(
,\,: A: Both the logic block symbol for the AND function
fII
Y
and the abbreviation for ampere.
AC: Alternating current.
access lines: The pulses on these lines turn the
C
stepper motor.
AM:
Address mark.
amplifier: An electronic circuit that increases the
amplitude of a signal signal for distribution.
AR: Amplifier.
AR-DIF: See differeniator-amplifier.
backstop screw: An adjustable screw in the cover
assembly that stops the backward movement of the bail
o
assembly.
bail assembly: A mechanical arm that operates under
control of the head load solenoid to load or unload. the
read/write heads.
band: See drive band.
basic data exchange: A format for exchanging data on
diskettes between systems or devices that use a
diskette 1.
block: A collection of records recorded as a unit. o
blocking: Combining two or more records into one
block.
C: Celsius.
O
carriage: The part that carries the two read/write
~) heads under control of the stepper motor.
CE: See customer engineer.
characteristics: Electrical, physical, or functional
o
features of a machine which are not specifications.
clamp: A part used to lock another part.
Appendix B. Glossary
collet: The part of the cover assembly that centers and
holds the diskette to the drive hub.
crosstalk: Data bits detected from one track while
reading another track.
customer engineer (CE): A person who services IBM
products in the field.
DC: Direct current.
DET: See detector.
detector (DET): An electronic circuit that detects a
carried signal and converts it to a signal pulse.
differentiator-amplifier (AR-DIF): An electronic circuit
whose output signal is a function of the time rate of
change in the input signal.
diskette 1: A diskette used for storing data on only one
surface.
diskette 2: A diskette used for storing data on both
surfaces.
diskette 2d: A diskette used for storing data on both
surfaces with twice the bit density used on a diskette 2.
DR: See driver.
drive band: A metal band connected to the stepper
motor pulley and the head/carriage assembly.
drive hub: A continously running part that turns the
diskette at 360 rpm.
driver (DR): An electronic circuit that increases the
energy of a signal to a sufficient level to drive a
predetermined load.
environmental: Pertaining to the environment.
F: Fahrenheit.
flux: The flow of magnetic force around an object when
that object is magnetized or has electric current flowing
through it.
FM (frequency modulation): See modulation.
Glossary 8-1