Teledyne LeCroy X-STREAM OSCILLOSCOPES Remote Control - Manual (Page 14)

P A R T O N E : A B O U T R E M O T E C O N T R O L
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ISSUED: February 2005 WM-RCM-E Rev D
HEADERS
The header is the mnemonic form of the operation to be performed by the oscilloscope. Most command and
query headers have a long form, which allows them to be read more easily by people, and a short form for better
transfer and decoding speed. The two are fully equivalent and you can use them interchangeably. For example,
TRIG_MODE AUTO and TRMD AUTO are two separate but equivalent commands for switching to the
automatic trigger mode.
Some command or query mnemonics are imposed by the IEEE 488.2 standard. They are standardized so that
different oscilloscopes will present the same programming interface for similar functions. All these mnemonics
begin with an asterisk *. For example, the command *RST is the IEEE 488.2 imposed mnemonic for resetting
the oscilloscope, whereas *TST? instructs the oscilloscope to perform an internal self-test and report the
outcome.
HEADER PATHS
Certain commands or queries apply to a subsection of the oscilloscope; for example, a single input channel or a
trace on the display. In such cases, you must prefix the header by a path name that indicates the channel or trace
to which the command applies. The header path normally consists of a two-letter path name followed by a
colon : immediately preceding the command header. One of the waveform traces can usually be specified in the
header path:
Header Path Name Waveform Trace
C1, C2 Channels 1 and 2
C3, C4 Channels 3 and 4 (on four-channel models)
M1, M2, M3, M4 Memories 1, 2, and 3 and 4
F1, 2, F3, F4, F5, F6, F7, F8
TA, TB, TC, TD
Traces F1 through F8
Equivalent to F1 through F4, for backward
compatibility with other LeCroy DSOs.
EX, EX10, EX5 External trigger
LINE LINE source for trigger
Example: C1:OFST -300 MV Command to set the offset of Channel 1 to -300 mV.
You need only specify a header path once. Subsequent commands with header destinations not indicated are
assumed to refer to the last defined path. For example, the queries C2:VDIV?; C2:OFST? ask: What is the vertical
sensitivity and the offset of channel 2? While the queries C2:VDIV?; OFST? ask exactly the same questions
without repeating the path.