Bus tag21 55, Bus acg13 od, Bus scg20 74 – Measurement Computing Analyzer488 User Manual

Page 58

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Section 3

Front Panel Operation

3.12

Press [STEP]

The STEP LED will light.

to set handshaking to step.

(Note that pressing either [ENTER] or [STEP] will
perform a handshake when STEP handshaking is
selected.)

SRQ

IFC

REN

ATN

EOI

LOCATION

MESSAGE

CMD> output 00;test

BUS TAG21 55

¼

¼

This display shows that one event has taken place. Pressing

[STEP]

to set handshaking also performs a single handshake. Press

[STEP]

8 times to step through and display the same events as shown

above.

Press [FAST]

The FAST LED will light.

to set handshaking to fast.

SRQ

IFC

REN

ATN

EOI

LOCATION

MESSAGE

CMD> output 00;test

BUS ACG13 OD

¼

¼

The same events occurred on the bus, but the the transactions were

too fast to view.

Press [NONE]

All handshaking LEDs will be off.

to turn handshaking off.

SRQ

IFC

REN

ATN

EOI

LOCATION

MESSAGE

CMD> output 00;test

BUS SCG20 74

¼

¼

ERROR

09: TIME OUT OR BUS ERROR ON WRITE

An error occurred because no listener was present. The controller

asserted Attention to talk and presented 't' on the bus. The bus message,
SCG20

, is the multiline command, &h74, the hex value of ASCII 't'.

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