Measurement-computing Analyzer488 Instrukcja Użytkownika Pobierz pdf (Strona 234)

Section 6 Instrument Simulator

6.24

Status Un

The Status command,

, is used to return a command status message, or a

keyboard status message.

The Status command

will cause the Analyzer488 to send a command status

message when next addressed to talk. The command status message shows the current

options which are in use for each command. The command status of the Analyzer488

may be read at any time without interfering with normal operation. Any error

conditions are cleared after the status string is read by the controller.

The format of the status byte returned by the Analyzer488 after receiving a

command is as follows:

*.*C#####D#E#G#H#I###J#K#P###S###T#####U#W##Y#Z###

where each

shows the current option in use for that command. The leading

information

*.*

is the revision level of the Analyzer488 firmware.

The Status command

returns the key code for a key pressed on the

Analyzer488 front panel keyboard. A key code, 0 to 44, is returned if a key is pressed,

the value 255 is returned if no key is pressed.

The Status command

waits up to 10 seconds for a key press from the

Analyzer488 front panel keyboard. A key code, 0 to 44, is returned if a key is pressed,

the value 255 is returned if no key is pressed before 10 seconds have elapsed.

The following illustration shows the key codes for the Analyzer488 front panel

keyboard:

RATE NONE

ERASE ZERO

SET REL

+TRIGGER -TRIGGER FIND

DISPLAY MEASURE

HEX

BIN

HANDSHAKE

MEMORY

TRIGGER

SOURCE

SHIFT

CURSOR

CONTROL

DATA ENTRY

FAST SLOW STEP LISTEN TALK EOI ATN SRQ REN IFC

EXIT

D ENTERE

B56

+/-

SAVEHELP

NEXTLASTFIRST

STAT SETUP ARM

ESCA897VIEW REC REL

16 17 18

26 27

29 30 31

32 33 34

37 38

19 20 21 22 23 24 25

7891040

4 5 6 11 41

1231242

0151413

43 44 45

1 2 ... 229 230 231 232 233 234 235 236 237 238 239 ... 280 281

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