R&S EM510, Manual

Page: 97 / 183

SENSe Subsystem :DATA? EM510
5.61 4065.7763.32-01.00
. :DATA? [<data_handle>]
Query about the current measured values of active sensor functions.
When only the command
SENSe:DATA?
is used to query measured values, the measured values
reported back may be as old as 200 ms. For display on the unit measured values are captured every
200 ms and put into a buffer.
In the event that current data are needed the command combination
INIT;:SENSe:DATA?
is to be
used. As response to this query the current measured value is reported back.
When a complete measurement is to be started, possibly by using a predefined measuring time, for
instance the command combination
INIT;:SENSe:DATA?
should be used. As a result, the
measurement history is reset, i.e. the detectors are discharged, a measurement is started and the result
is reported back when the measuring time has elapsed.
In order not to block remote-control communication during longer measuring times, the measured value
should only be queried when the measurement has been completed.
The measured value thus obtained is stored in
MTRACe
, provided that the path to the result buffer
MTRACE
was enabled with command
TRACE:FEED:CONTrol MTRACE, ALWays
.
The unit may actively report the end of measurement (MEASUring bit in operation status register
becomes inactive) via SRQ if the status register has been configured accordingly (see also "Status
Reporting System" on page 5.128).
Note:
For this command the keyword
SENSe
must not be omitted as
DATA?
can be mixed up with the
subsystem
TRACe/DATA.
Parameters:
none output of the measured values of all active sensor functions; if no
function is switched on, an error
-221, "Settings
Conflict"
will be generated
"[SENSe:]FREQuency:OFFSet"
output of offset value or error
"[SENSe:]VOLTage:AC"
output of level value or error
-221, "Settings Conflict"
Note:
With SW option EM510IM (ITU Measurement) installed, apart from level and offset the measurement
functions AM m odulation index , FM frequency deviation, PM phase deviation and bandwidth
measurement are also available.
"AM"
output of AM modulation index measurement value
"AM:POSitive"
output of AM positive modulation index measurement value
"AM:NEGative"
output of AM negative modulation index measurement value
"FM"
output of FM frequency deviation measurement value
"FM:POSitive"
output of FM positive frequency deviation measurement value
"FM:NEGative"
output of FM negative frequency deviation measurement value
"PM"
output of PM phase deviation measurement value
"BANDwidth"
output of band width measurement value