HP Switch E42 Manual do Utilizador descarregar pdf (Página 159)

Model 5328A

Schematic Diagrams

MNEMONIC

(AO)

R (A1)

C ARM

CLK

Data A

Data B

Data C

Data D

Digit A

Digit B

Digit C

Digit D

DVM

F Code A (FA)

F Code B (FB)

F Code C (FC)

F Code D (FD)

GOSC

HDS

HDSA

HLS

RL (HOPN)

HPL

HRD

HRS

HRTB

R (HTBA)

Table 8-1. Signal Mnemonics

DESCRIPTION

Output of Time Interval Unit, A channel. ECL levels.

Non-latched ROM bits that drive Arming Multiplexer select

lines on Function Selector. TTL levels.

Output of Time Interval Unit, B channel. ECL levels.

Output of C module, the carry input for the FS decade.

ECL levels.

Active high TTL line used for module C arming

measurement.

Clock. Digit address clock to display. TTL levels.

TTL 4-bit BCD code. Data going to display and HP-IB.

TTL 4-bit digit address code. Controls interchange

of data.

Frequency line counted by Function Selector to give display

reading. ECL level.

Function code from function switch. TTL levels.

Function Selector.

Gated oscillator. ECL levels.

TTL level high disables synchronizers.

Used by Option 011 HP-IB Interface to strobe bus data in

remote listener.

TTL level line used to strobe latches.

Latched ROM line which locks open Function Selector

main gate.

Same as LDP.

High resets decades. TTL active high.

High strobes 4K ROM, TTL active high.

High resets time base. TTL active high. Also resets

Function Selector.

Non-latched ROM bit which enables the TTL level Channel A

signal from the Function Selector to be counted by the

Time Base.

8-4

1 2 ... 154 155 156 157 158 159 160 161 162 163 164 ... 218 219

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