Rohde & Schwarz R&S ZVA 8 - Active Traces in Remote Control

Special Remote Control Features R&S
®
ZVA/ZVB/ZVT
1145.1084.12 5.28 E-1
Display the generated trace (identified by its name Ch4Tr1) in diagram area no. 2 (window suffix 2), assigning the
trace number 9 (trace suffix 9) to it.
Active Traces in Remote Control
In manual control there is always exactly one active trace, irrespective of the number of channels and
traces defined. The active channel contains the active trace; see section Trace Settings in Chapter 3.
In remote control, each channel contains an active trace (unless the channel contains no trace at all),
so the notion of active channel is meaningless. This principle actually simplifies the remote control
command syntax, because it allows the active trace in a particular channel to be referenced by means
of the channel suffix. No additional trace identifier is needed; there is no need either to distinguish
channel and trace settings using mnemonics or suffixes.
The active traces are handled as follows:
• After a preset (*RST), the analyzer displays a single diagram area with the default trace no. 1
named TRC1. The trace is active in manual and in remote control.
• In manual control, a new, added trace automatically becomes the active trace.
• In remote control, the first trace assigned to a channel remains the active trace until another
trace in the channel is explicitly selected as the active trace
(CALCulate<Ch>:PARameter:SELect '<trace_name>').
• As a consequence, the active traces for manual and remote control may be different, even
within the same channel.
The following program example illustrates how to create, select and reference traces. It is instructive to
observe the analyzer screen in order to check the effect of each step.
*RST
Reset the analyzer, creating channel no. 1 with the default trace Trc1. The trace is displayed in diagram area no. 1.
CALC1:PAR:SDEF 'Trc2', 'S11'; DISP:WIND:TRAC2:FEED 'Trc2'
Create a new trace named Trc2, assigned to channel no. 1 (the suffix 1 after CALC, may be omitted), and display
the trace. The new trace automatically becomes the active trace for manual control. To check this, click Trace –
Marker – Marker 1 to create a marker. The marker is assigned to Trc2. Delete all markers (Trace – Marker – All
Markers Off).
CALC1:MARK ON
To verify that Trc1 is still active for remote control, use the channel suffix 1 after CALC (may be omitted) to
reference the active trace in channel 1 and create a marker Mkr 1. The marker is assigned to Trc1.
CALC:PAR:SEL 'Trc2'; CALC1:MARK ON
Select the new trace Trc2 as the active trace for remote control. Create a new marker to verify that Trc2 is now the
active trace in channel 1.
In the SCPI command description, the numeric suffix <Ch> is used for channel settings (it
denotes the configured channel), whereas <Ch/Tr> is used for trace settings (it denotes the
active trace in the channel).