Tektronix 2221 - Page 122

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Options and Accessories - 2221 Operators
Table
7-33
RS - 232 - C Specific Commands
Commands
Description
ALL
FLOW < [ ON ]
or OFF >
Enables ( ON ) or disables ( OFF ) DC1 / DC3 flow control . FLOW ON is the default
and power - on state . Binary data transfers cannot be made with FLOW ON . A
FLOw ? query returns the present state , ON or OFF .
With FLOW ON , the < control - S > , < control - Q > , and < control - D > are
recognized during data transfers . Their functions are as follows :
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< control - S >
Temporarily suspend output of characters .
< control - Q >
Resume
character
output
that
has been
temporarily
suspended .
<
control - D >
Abort the command or query execution ; erase both
input and
output
buffers
;
reset
the
message
processor .
ALL
REMote < { ON )
or
OFF
>
Enables
( ON
) or
disables ( OFF )
setting
of
remote -
controllable
oscilloscope
states . An execution error service request is sent if a control command is sent
with REM OFF .
REM ?
returns the
present state , ON or
OFF .
ALL
STOP < 1
or 2 >
باب
Sets the
number
of
stop bits used
in
transferring
character codes .
The usual
selection is 1 though some printers require two stop bits at certain baud rate
settings
.
STOP is set to 1 at
power on .
When
connecting to a printer or
plotter ,
select a
baud
rate
that uses
only
one stop bit .
STOP
?
returns the
present
setting , 1 or 2
.
ALL
STAtus ?
Returns the
current
status
of
the
instrument . If
no
service
requests are
pending ,
the status byte returned indicates No Status to Report . If RQS is off , an EVEnt ?
query must be used to find out if an event occurred and , if so , which one . The
EVEnt ? query produces more useful information about an event than the service
request status byte .
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