Agilent Technologies 2712A, 2948 manual Schematic Diagram Notes 10, Active Levels

Model 8904A Service

Table 8-1.Schematic Diagram Notes (10 of 11)

€Active3High Input		ACTIVE LEVELS
	A-L	ACTIVE HIGH inputs and outputs are indicated by the ab-

ACTIVELEVEL sence of the polarity indicator symbol. Active High Output

Active Low Input	<	ACTIVE LOW inputs and outputs are indicated by the pres-
		+ ence of the polarity indicator symbol ( h).
97
ActiveACTIVELow Output
	4	t

LEVEL

EDGE SENSITIVE INPUTS

EDGE SENSITIVE (low-to-high) inputs are indicated by the presence of the dynamic indicator symbol ( +).

OUTPUT I I

Edge Sensitive

High-to-Low OUTPUT

Edge Sensitive

I NPUTJ - C

-OUTPUTDelayed Output

(Active High Input)

Delayed Output

(Active Low Input)

EDGE SENSITIVE+(high-to-low) inputs are indicated by the presence of both the dynamic indicator and the polarity in- dicator symbols ( ’.

I I

DELAYED OUTPUT RESPONSE

I

I[ OUTPUT DELAY indicator symbol (7) shows that the out-

Iput becomes effective after the input signal returns to its inactive state.

I

U

INHIBIT INPUTS

INHIBIT indicator symbol (+) indicatesan input that, when active, inhibits (blocks) the output(s) from achieving their active states (the outputs remain inactive).

ANALOG LINES

ANALOG indicator symbol (n)indicates a line that has an analog input or output.

NONLOGIC CONNECTION

The Nonlogic Connection symbol (X) indicates a connec- tion that does not carry any logic information.

8-13