Quick Installation Guide
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WERA4-Quick-US-200917
Page 50 of 73
The first measurement will start to the next minute defined by this timing. It will not wait
until minute 59.
In CPCI crontab mode the measurement will be prepared at the defined time, but
acquisition/transmission will start the next minute. The resulting data file will have a time
encoding of the real acquisition start, so one minute later than defined in this field.
7.1.12
Use CPCI crontab
By selecting this check box, the measurements will be started directly by the crontab of the
CPCI computer in the WERA system and not by the crontab of the user interface pc.
It can be used to synchronize the start of several WERA systems or remote stand-alone
transmitters (SAT) very accurately.
This option needs modified hardware compared to the standard WERA system.
Only use this option, if your system is capable to do so.
7.1.12 Freq. Mana P Adapt Frequency
Automatic frequency management is available for continuous measurements only, not for
single measurements. It requires that an allowed (licensed) frequency range is defined.
Please enter the lowest working Frequency into the first field and the highest working
frequency in the second field. The format is [nn.nnn] MHz. In continuous mode the system
will never operate outside of this frequency band.
If two separate frequency bands are available, then enter the start and stop frequency of
the first frequency band in the Freq. Management(1) fields and the start and stop
frequency of the second frequency band in the Freq. Management(2) fields. Additionally
select the check box labelled Enable 2nd Frequency Range.
Enabling the Prescan box will start a 1-minute frequency scan of the defined frequency
bands 100 seconds before each automatic measurement cycle. Scan data will be stored at
the same location as the measurements. If the scan data should be processed and used
for automatic adaptation of the working frequency, please also check the box "Adapt
Frequency". This will process the scan data and automatically adapt the working
frequency. If the box "Prescan" is not checked, while “ Adapt Frequency ” is, the "Prescan"
box will be checked automatically, as no frequency adaptation can be done without
prescans.
7.1.13
DPT
This parameter is used in continuous mode only. By selecting this check box, a short (16
seconds) direct path test (DPT) measurement will be performed 2 minutes before the real
measurement starts. It can be combined with a frequency pre-scan.
The resulting .CAL file may automatically be processed by the process_CAL.sh script, by
selecting the appropriate “process after Measurement” check box is activated.
Note that in the wera crontab the DPT and a frequency scan are initiated within the same
minute, but the start of the scan is delayed by approx. 30 seconds, while the DPT starts
immediately.
