User manual

Part 5: IEEE 488.2 Programming Reference
You will receive a response like:
TIME_DIV 2E-3 S
Tip: Querying can be a useful way of generating a command that is known to be correct, and the
response copied straight into your program. The repeated header text can be suppressed with the
command COMM_HEADER.
Header path
Certain commands or queries apply to a subsection of the oscilloscope, such as a single input channel or
trace. These commands must have their headers prefixed with a path name indicating the recipient of the
command.
The header path normally consists of a two-letter path name followed by a colon : immediately preceding
the command header.
EXAMPLE: C1:OFST -300 MV is a command to set the offset of Channel 1 to -300 mV.
The target waveform trace is specified using the following header path names:
Header Path Name Waveform Trace
C1 to C
n
Channels
M1 to M
n
Memory traces
F1 to Fn Math function traces
TA, TB, TC, TD Equivalent to F1 through F4, for backward compatibility with legacy instruments
EX, EX10, EX5 External trigger
LINE
LINE source for trigger
Note: When older trace names are used, such as TC, the oscilloscope response shows the new
label equivalent. So, a TC header path query would return as an F3 header path response.
Header paths need only need be specified once until the path changes. Subsequent commands without
header paths are assumed to refer to the most recently defined path.
Although optional, it's recommended to always use header paths to minimize the risk of error if the
command order changes.
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