6-4 :TRACe Subsystem Vector Voltmeter Commands
6-6 PN: 10580-00319 Rev. N S412E PM
6-4 :TRACe Subsystem
This subsystem contains commands pertaining to the Vector Voltmeter mode.
: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 6-2, “Trace Header Parameters.
For the example response, the serial number (SN) is 83320012 and is
returned as “SN=83320012”.
Query Response: <char> (returns block data)
Front Panel Access: NA
Example Response Format:
[#800001070SN=83320012,UNIT_NAME=,TYPE=DATA,DATE=1999-11-30-02-00-10-10,
APP_NAME=MWVNA,APP_VER=T0.00.1001,VVM_MODE=0.000000,VVM_CW_FREQ=
0.005000,VVM_MEAS_TYPE=0.000000,VVM_RETURN_MEAS_FORMAT=0.000000,
VVM_CABLE=1.000000,VVM_PORT_1_SAVE_RETURN_REF=0.000000,VVM_PORT_1_
SAVE_INSERTION_REF=0.000000,VVM_PORT_2_SAVE_RETURN_REF=0.000000,VVM_
PORT_2_SAVE_INSERTION_REF=0.000000,VVM_PORT_1_RETURN_REF_AMP=
0.000000,VVM_PORT_1_RETURN_REF_PHASE=0.000000,VVM_PORT_1_RETURN_REF_
VSWR=1000.000000,VVM_PORT_1_RETURN_REF_REAL=0.000000,VVM_PORT_1_
RETURN_REF_IMAG=0.000000,VVM_PORT_1_INSERTION_REF_AMP=0.000000,VVM_
PORT_1_INSERTION_REF_PHASE=0.000000,VVM_PORT_1_RETURN_REF_RAW_
REAL=1000000.000000,VVM_PORT_1_RETURN_REF_RAW_IMAG=0.000000,VVM_PORT
_2_RETURN_REF_AMP=0.000000,VVM_PORT_2_RETURN_REF_PHASE=0.000000,VVM_
PORT_2_RETURN_REF_VSWR=1000.000000,VVM_PORT_2_RETURN_REF_REAL=
0.000000,VVM_PORT_2_RETURN_REF_IMAG=0.000000,VVM_PORT_2_INSERTION_
REF_AMP=0.000000,VVM_PORT_2_INSERTION_REF_PHASE=0.000000,VVM_PORT_2_
RETURN_REF_RAW_REAL=1000000.000000,
VVM_PORT_2_RETURN_REF_RAW_IMAG=0.000000, CAL_PORT=1]
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