Tektronix 2221 - OPTION 12 RS-232-C OPERATORS INFORMATION; Option 12 Side Panel and RS-232-C PARAMETER Switch

미
Options and
Accessories —
2221
Operators
1.
Perform a
serial
poll
.
Table 7-7
Specific Format Choices for Option 12
2.
Send
an
EVENT ?
query to
the
oscilloscope
requesting
service
.
Format Parameter
Choice Made
Format Characters
3. If the
EVENT
? query
response
is
not zero , then
perform the response required to handle the
event .
Not
transmitted
;
ignored on
reception .
Either
CR or
CR
-
LF
may be
selected
as
the
message
terminator .
u
Message
Terminator
Measurement
Terminator
4.
Return
to
the
main
program .
Follows
program
message
unit
syntax
.
Link
Data (
Arguments )
Multiple
Event
OPTION 12 RS
- 232 - C
OPERATORS
INFORMATION
Used in
sending
and
receiving
messages
.
Not
implemented to
report
multiple events on a single
reporting query . Multiple
events
may
be
reported by
multiple queries .
Descriptors
added
for
all
options .
Instrument Identification
Query
L
The RS -
232 - C
Communications
interface
conforms to
the
Tektronix
standard on
Codes ,
Formats ,
Conventions ,
and
Features for
messages sent
over to bus
for
communi
cations to
other RS - 232 - C
devices
.
Specific
formats
implemented in the
2200
DSO
family for the
Option
12
Communications
interface
are
listed in
Table 7-7 .
Specific
feature implementation is shown in Table 7-8 .
Set
Query
Extended by
using
other
commands as
queries .
U
Device
Trigger (
DT )
Not
implemented
.
INIT
Command Causes the
instrument
to
return to a default
initialization
state .
ال
Option
12 Side
Panel
Time / Date
Commands
Not
implemented .
Stored Setting Commands
Not
implemented
.
u
Waveform
Transmission
The
side panel for
Option 12
instruments (
Figure 7-3 )
includes one
AUXILIARY
connector
, one
RS - 232 -
C
inter
face
port (
providing
both DTE
and
DCE
capability ) , and
one
PARAMETERS switch
.
The
Controls ,
Connectors ,
and
Indicators part of this
manual contains
information
on
the
use of
the
AUXILIARY
Connector
.
Refer
to
Figure 7-3 for
location
of the
Option
12
side -
panet
controis
and
connectors .
Remote On / Off
implemented
.
Waveforms
may be
encoded in
ASCII ,
HEX , or
BINARY . The
oscilloscope powers on with
the
encoding set
to BINARY
.
REMote must
be set to ON
to get the instrument to
change a
remote -
controllable
function
.
The
instrument
powers
up
with
REMote
OFF .
AUXILIARY
Connector
-
Provides
connections for an X -
Y
Plotter and an
External
Clock input ( see
Controls ,
Con
nectors
,
and
Indicators
)
.
u
IEEE 728
Compliance
not intended
.
RS - 232 -
C
PARAMETER
Switch
-
Allows the
selection of
setup options for the RS - 232 - C interface . The switches
are read at power - up . Four sections of the switch select
the
baud
rate ,
three
select
parity
, one
selects the
termi
nator , and
two are
for
printer /
plotter
selection
.
The
function of each
switch
section
is
shown
in
Table
7-11 .
NOTE
RS -
232
- C
DTE
Connector -
Provides
connection
meeting
the EIA
RS -
232 - C
standard for
data
terminal
equipment
( see Figure 7-3
) . Table 7-9 lists
the function of
each pin
of the
connector
.
This
connector
is
provided
only
on
Option 12 instruments .
Do not
hook up
external
devices to the
DTE
connec
tor
and the
DCE
connector at
the
same
time .
7-10
L.