14-20 Remote control
(Continued)
SSFD
FreqStart;
FreqStop;
FreqStep;
Detector;
HoldTime;
Rbw;
MinAtt;
Preamp;
Preselector;
ScanHoldT
• MinAtt = Minimum attenuation allowed during sweeping. This parameter
ranges from 0 (no limitation) to the maximum the 9010/9030/9060/9180
or 9010/03P/30P/60P can set. This parameter is normally used to avoid
switching up the sensitivity in order to either protect the input from high
spikes or to prevent switching down the attenuation when, for instance,
the limit is so high that it would be only waste of time.
Note: In Sweep mode the Attenuator is always forced to AUTO
• Preamp. This Parameter switches the Preamplifier On or Off according
to its content as follows.
o On. It turns ON the preamplifier.
o Off. It turns Off the preamplifier.
• Preselector. This Parameter switches the Preselector On or Off
according to its content as follows.
o On. It turns ON the Preselector.
o Off. It turns Off the Preselector.
• ScanHoldT = Hold Time used in Smart Mode when tuning for Peak for
each step and it is expressed in ms. Note that this is used only in case of
Smart Mode and not in standard sweep. This parameters is not
compulsory and can be omitted if not required. I case it is not present,
minimum time is taken.
This command triggers a free sweep (no automatic items are selected) based on
the provided parameters. After this command has been received, all parameters
issued in the command itself are checked out and, if coherent, a sweep starts
otherwise the related error is notified and the sweep is not triggered.
Moreover, using the Frequency-Scan-Tab, the user has the capability of tuning
only those frequencies which are suspected skipping thus the remainder. Hence,
saving a lot of time.
After the command has been received, the 9010 replies by sending a string which
reflects the status of parameter check as follows:
• SFD=OK<RC><LF> No error in parameters and sweep started.
• SFD=ERR 1<RC><LF> An Error was found in start or stop frequencies.
Errors can be one of the following:
o Start Frequency lower than minimum allowed frequency
o Stop Frequency higher than maximun allowed frequency
o Start Frequency higher than Stop Frequency
•
SFD=ERR 2<RC><LF> An Error was found in step frequency. Step is
either
o Too small.
o Is equal to zero (use of Frequency-Scan-Tab) but there are less
than two frequencies in the table
• SFD=ERR 3<RC><LF> An Error was found in detector. Errors can be
one of the following:
o Invalid Detector or no detector found. Detectors must be
indicated by ‘P’,’Q’,’R’,’A’,’N’ and ‘S’ only
o Smart Mode selected but no active limit
o Smart Mode selected but no alternative detector
o Smart Mode selected but more than two alternative detector
indicated
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