:TRACe VVM Subsystem Vector Voltmeter Commands
4-8 PN: 10580-00306 Rev. E MS20xxC PM
4-6 :TRACe VVM Subsystem
This subsystem contains commands pertaining to the Vector Voltmeter mode.
Trace Header Transfer
:TRACe:PREamble?
Description: Query only. Returns trace header information. The response begins
with an ASCII header. The header specifies the number of following
bytes. It appears in the format #AX, where A is the number of digits
in X, and X is the number of bytes that follow the header.
Parameters are returned in comma-delimited ASCII format. Each
parameter is returned as “NAME=VALUE[UNITS]”. Note that the
parameters that are returned depend on the firmware version and that
this document does not cover all parameter values that are returned by
the command. Refer to Table 4-4, “Trace Header Parameters.
For the example response, the serial number (SN) is 83320012 and is
returned as “SN=83320012”. Refer to section “Example Response
Format:” on page 4-9.
Syntax: :TRACe:PREamble?
Query Response: <char> (returns block data)
Front Panel
Access: NA
Table 4-3. :TRACe VVM Subsystem Commands
Keyword
Parameter
Form Parameter Data or Units Notes
:TRACe
:PREamble? <char> Returns block data Query Only
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