Measurement-computing Digital488 Manual de usuario descargar pdf (Pagina 43)

Section 3 Command Descriptions

3.13

The

Data Strobe

output is pulse for approximately 50 microseconds after new

data is output on the selected port(s).

When the

Digital488

is addressed to talk (

) it asserts

Inhibit

, reads the data

from all ports, unasserts

Inhibit

and outputs the number of characters determined by the

and

commands. Leading zeros are not suppressed and the bus terminators are

appended to the output. After output the

Digital488

must be re-addressed to talk to

perform subsequent reads.

EDR

(

) may also be used to capture data in this format.

Example:

OUTPUT 718;"F1X"

select ASCII Character format

ENTER 718; A$

read data from the

Digital488

DISP A$

display shows

4>6;

OUTPUT 718;"D1??2ZX"

send

1??2

to the

Digital488

ENTER 718; A$

read data from the

Digital488

DISP A$

display shows

1??2

F2 Format - ASCII Binary

In the

format, the each data bit is described with an ASCII 0 or 1. Each byte is

formatted in two 4-bit multiples separated by semicolons.

F2 String Decimal Equiv

0000;0000 0 0000;1001 9

0000;0001 1 0000;1010 10

0000;0010 2 0000;1011 11

0000;0011 3 0000;1100 12

0000;0100 4 0000;1101 13

0000;0101 5 0000;1110 14

0000;0110 6 0000;1111 15

0000;0111 7 1000;0001 129

0000;1000 8 1111;1111 255

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 82 83

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Measurement-computing Digital488 Manual de usuario Pagina 43

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