HP (Hewlett-Packard) 86140A TV Cables User Manual


 
4-98
Remote Operation
TRACe Subsystem Commands
TRACe:FEED:CONTrol TRA|TRB|TRC|TRD|TRE|TRF,ALWays|NEVer
TRACe:FEED:CONTrol? TRA|TRB|TRC|TRD|TRE|TRF
Controls how often the specified trace accepts new data. Setting the
TRACe:FEED:CONTrol command to ALWays will allow the trace to always
accept new data whenever data is available from the FEED. This is equivalent
to turning on the trace update from the front panel.
Setting the TRACe:FEED:CONTrol command to NEVer will cause no new data
to be fed into the trace. This is equivalent to turning off the trace update from
the front panel.
When switching from NEVer to ALWays, all the valid data from the data source
is immediately copied into the trace. If, for example:
the instrument is in single sweep mode.
TRA has SENSe:DATA as the FEED and NEVer as the FEED:CONTrol.
SENSe:DATA contains valid measurement data
Setting the TRACe:FEED:CONTrol command from NEVer to ALWays for TRA
will immediately copy the SENSe:DATA into trace A. If the instrument was in
continuous sweep mode, and a sweep was in progress, setting the CONTrol
command from NEVer to ALWays would immediately copy all the valid
SENSe:DATA for the partial sweep.
TRACe:POINts TRA|TRB|TRC|TRD|TRE|TRF,<numeric_value>
TRACe:POINts? TRA|TRB|TRC|TRD|TRE|TRF
Sets the number of data points to be used in the trace. Use only for download-
ing data with trace subsystem commands. Use SENSe:SWEep:POINts for
changing the measurement trace length. Refer to [SENSe:]SWEep:POINts
<numeric_value> on page 4-84.
book.book Page 98 Monday, January 31, 2000 10:34 AM