Options and
Accessories-2230
Operators
ALL
NOTE
The
information given
in
the
Waveform
Preamble
Fields
table
is
primarily to help identify
the
result
of
a
WFMpre? query. As
such,
the
arguments are not usually sent as individual commands, but are grouped
together
as
a complete waveform preamble.
If
sent as a single command,
an
argument
value
is
not accepted
(except as noted for
ENCdg)
until
the
curve
it
is supposed
to
go with is transferred to
the
selected
DA
Ta
TAR
get reference memory.
If
any size error
in
any
of
the
waveform preamble numeric arguments
is
sent to
the oscilloscope, it will
be
accepted.
Then,
when
the
curve data is sent
the
error will be rejected, and a
waveform preamble error service request will
be
sent.
Commands
Table 7-30
Waveform Preamble Fields
Description
WFMpre ENCdg: <ASCii,
[Bl Nary],
or
HEX>
Selects the waveform curve data encoding format for transferring data. WFEpre
ENCdg
and
DATa ENCdg operate identically. Data points are represented as
unsigned integers
in
any
of
the encoding formats.
ALL
WFMpre?
ALL
WFMpre? WFld
7-40
Returns the waveform identification string as with the WFMpre? WFld query plus
the value for
all
the waveform preamble arguments. The short form of the return is:
WFM WFI:• <identification
string>•,
NR.P:2048, PT.O:256, PT.F:ENV,
XMU:1.0E+3, XOF:0, XUN:S, XIN:10.0E-6, YMU:8.0E-3, YOF:0, YUN:V,
ENC:ASC, BN.F:RP, BYT:1,BIT:8, CRV:CHK;
Each
of
the arguments may
be
queried separately to find out its value.
Returns
an
ASCII waveform identification string giving the key features
of
the
waveform. The information returned is:
acquisition source, channel, Volts/Div, input coupling, Sec/Div, acquisition mode,
and
the number
of
the curve being sent.
In
XY
mode, the CH2 Volts/Div and input
coupling are added. The waveform
ID
is ignored if received as a command. The
form
of
the return is:
WFM WFI:• ACQ, CH1, 0.2mV,
DC,
0.5mS, AVERAGE,
CRV#
3•;
or for XY:
WFM WFI:•
REF4,
XY,
20mV,
DC,
50mV,
DC,
0.5mS, SAMPLE,
CRV#
1•;
NOTE
The
DA
Ta
CHAnnel must
be
CH1
to get
the
XY information. All vertical information
is omitted for a
2220.
--
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