Rohde & Schwarz ZVL series - Initiating Measurements, Speed Considerations

R&S ZVL Remote Control
Basic Remote Control Concepts
Operating Manual 1303.6580.32-05
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The following program example illustrates how to create, select and reference traces. It is instructive to
obse
rve 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 and for remote 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 Trc2 is also 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 Trc2.
CALC:PAR:SEL 'Trc1'; CALC1:MARK ON
Select the old default trace Trc1 as the active trace for remote control. Create a new marker to verify that
Trc1 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 <Chn> is used for trace settings (it denotes the
active trace in the channel).
Initiating Measurements, Speed Considerations
After a reset the network analyzer measures in continuous mode. The displayed trace shows the result of
the last sweep and is continuously updated. This provides a permanent visual control over the
measurement and the effect of any analyzer settings.
In remote control, it is advisable to follow a different approach in order use the analyzer's resources to full
capacity and gain measurement speed. The following principles can help to optimize a remote control
program (see also programming example Typical Stages of a Measurement):
• Switch off the measurement while configuring your instrument.
• Use a minimum number of suitably positioned sweep points.
• Start a single sweep, observing proper command synchronization, and retrieve your results.
The following command sequence performs a single sweep in a single channel.
*RST; INITiate:CONTinous OFF
Activate single sweep mode for all channels (including the channels created later).
INITiate:SCOPe SING
State that a single sweep will be performed in the active channel only.
INITiate[:IMMediate]; *WAI
Start a single sweep in channel no. 2, wait until the sweep is terminated before proceeding to the next
command (see Command Synchronization).