Tektronix NetTek YBT250, Руководство пользователя

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Changing Instrument Settings
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YBT250 Field Transmitter & Interference Tester User Manual
c. To replace the current channel table with the specified
selections, select
Replace the current table with these
channels
.
d. Tap OK when finished.
8. Tap OK to close the Setup window.
Customizing the Channel Table
The Channel Table is a file used by the YBT250 to specify the
characteristics of the channels assigned to a signal standard. You can
customize the Channel Table to suit the specific needs of your
system. For example, if you have set the bandwidth of your channels
to be wider than the standard bandwidth, you can specify the wider
bandwidth in a customized Channel Table.
Because the channel bandwidth is used in some measurements, if
your system’s channel bandwidth is non-standard and the YBT250 is
using the standard Channel Table, a measurement based on the
standard channel bandwidth will not be accurate for your system.
The YBT250 looks for a file named userstandards.txt in the
\BuiltInDisk folder when it starts up. If it does not find the file, the
YBT250 then looks for the standard channel table file, signalstan-
dards.txt, in the NetTekApps\YBT250 folder. If that file is not found,
a dialog box is displayed informing you that no standards file was
found, so a new channel table will be generated using internal
default values.
Creating a Custom Channel Table
To create a custom channel table:
1. Locate the existing signalstandards.txt file in either the
\BuiltInDisk\NetTekApps\YBT250 folder or
\NetTekApps\YBT250 folder (only if the application software is
loaded into volatile memory instead of flash memory).
2. Copy the signalstandards.txt file to the \BuiltInDisk folder.
The YBT250 will look only in the \BuiltInDisk folder for a
custom channel table.