Measurement-computing Analyzer488 Instrukcja Użytkownika Pobierz pdf (Strona 51)

Section 3 Front Panel Operation

3.5

Enable (REN) bus management line. It does not

necessarily indicate the driven state. A

indicates that

the line is asserted, blank means that the line is

unasserted.

IFC

The

IFC

digit indicates the actual state of the Interface

Clear (IFC) bus management line. It does not necessarily

indicate the driven state. A

indicates that the line is

asserted, blank means that the line is unasserted.

3.5.2 Front Panel LED Indicators

LED indicators on the front panel show the current display mode,

a recording ON LED, and the state of the three handshaking lines.

BUS

The

BUS

LED indicates that the Analyzer488 is in the bus

display mode, displaying information directly from the IEEE

488 bus. Changing the display mode is accomplished by

using the

[VIEW]

key.

MEMORY

The

MEMORY

LED indicates that the Analyzer488 is in the

memory view mode, displaying information from the record

memory. Changing the display mode is accomplished by

using the

[VIEW]

key.

RECORD

The

RECORD

LED indicates that the Analyzer488 is

recording bus events into the record memory.

NFRD

The

NFRD

LED indicates the logical state of the Not Ready

for Data (NRFD) handshaking line. The LED is on when the

NFRD line is asserted. This LED indicates the real-time state

of the bus, even when viewing recorded data.

NDAC

The

NDAC

LED indicates the state of the Not Data Accepted

(NDAC) handshaking line. The LED is on when the NDAC

line is asserted. This LED indicates the real-time state of the

bus, even when viewing recorded data.

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