HP E42 manual Htbo, Rl Ia, Rl Ic Ann, Lddca, Lmg, RL Ltot

		Model 5328A
		Schematic Diagrams
	Table 8-1. Signal Mnemonics (Continued)
MNEMONIC		DESCRIPTION
RL (HTBB)		Latched ROM bit which enables the TTL level Channel B
		signal from the Function Selector to be counted by the
		Time Base.
R (HTBO)		Non-latched ROM bit which enables the time base to count
		the oscillator output.
RL (IA)		TTL level latched ROM bits that drive High Speed
RL (IB)		Multiplexer select lines on Function Selector.
RL (IC)
L ANN		Low annunciators. TTL active low turns RHS annunciators
		on. Must be timed with digit address code to display
		selected annunciators.
LDDCA		Low disable Decade Counting Assembly (DCA). TTL active
		low disables DCA so that all DCA outputs are high.
LDI		Low disable indicators. TTL active low blanks RHS
		annunciators and all decimal points.
LDDIS		Low disable display. TTL active low blanks display except
		LHS annunciators.
LDP		Low decimal point. TTL active low turns decimal points on.
		Must be timed with digit address code to display selected
		decimal points.
LDSW		Low disable switches. The active low disables the FUNCTION
		RESOLUTION and RESET switches. Allows module control.
LEXT		Low external. TTL active low disables function and
		resolution switches for external control and lights RM
		annunciator.
LINH		Low inhibit. TTL active low inhibits starting new
		measurement.
LMG		Low main gate. TTL active low indicates main gate open.
RL (LMGF)		Latched ROM bit to Function Selector which selects the main
		gate F/F on the Function Selector to establish the gate time.
LMRES		Low when reset signal comes from display. Provides power-
		up type reset.
LRES		Low reset. TTL active low resets when FUNCTION,
		RESOLUTION, or RESET switch settings are changed.
		Also resets when DVM switches are changed. Provides
		power-up type of reset.
R (LST)		Non-latched ROM line which is high in stop totalize and low
		in start.
RL (LTOT)		Low totalize. Latched ROM bit low in totalize mode.
		TTL level.
LTR		Low transfer. TTL active low used in DCA.
MG		Main gate. Accurate signal to drive remote gate such as
M G		channel C. ECL levels.
OSC		10 MHz oscillator. TTL level.

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