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B

BINARY-CODED

The state in which conditions are expressed by a series of binary digits (0's and 1's) [13].


BISTABLE

A device that is capable of assuming either one of two stable states [13].

BISTABLE MULTIVIBRATOR

A multivibrator that has two stable states. It remains in one of the
states until a trigger is applied. It then flips to the other stable state and remains there until another trigger is applied. Also referred to as a FLIP-FLOP [9] [13].


BLACK

The reference color of equipment that passes unclassified information. It normally refers to patch panels [17].


BLEEDER CURRENT

The current through a bleeder resistor. In a voltage divider, bleeder current is
usually determined by the 10 percent rule of thumb [1].


BLEEDER RESISTOR

A resistor used to draw a fixed current [1].

BLIP

See PIP [18].

BLOCK DIAGRAM

A diagram in which the major components of an equipment or a system are
represented by squares, rectangles, or other geometric figures, and the normal order of progression of a signal or current flow is represented by lines [4].


BLOCKED-GRID KEYING

A method of keying in which the bias is varied to turn plate current on and
off [12].


BLOCKING

A condition in an amplifier, caused by overdriving one or more stages, in which the amplifier is insensitive to small signals immediately after reception of a large signal [18].



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