PVA-3000 Reference Manual
December 2, 2019 Sifos Technologies
Link Speed options are 100BaseTx and 1000BaseT. PSD must be calibrated at both rates in order to make
measurements at both link rates. Echo and Xtalk are only measured at 1000BaseT meaning that the selection of
100BaseTx will be ignored if those are the only calibrations performed.
Four options are provided for selecting the test ports that will be sequenced:
All Port 1s: This will sequence the selected meter calibrations (and selected Link Speeds for PSD) across all port #1’s
for every PVA test blade in the currently connected PVA instrument. This sequence would be done with test port #1
test cables all connected to the corresponding (same blade) test port #2 TEST interfaces and all port #2 test cables
removed.
All Port 2s: This will sequence the selected meter calibrations (and selected Link Speeds for PSD) across all port #2’s
for every PVA test blade in the currently connected PVA instrument. This sequence would be done with test port #2
test cables all connected to the corresponding (same blade) test port #1 TEST interfaces and all port #1 test cables
removed.
Selected Port: This will sequence selected meter calibrations (and selected Link Speeds for PSD) on the current
selected test port in the Slot-Port helper menu.
Port List: This selection will open a Port Selection dialog (see Figure 3.33) after the Run Calibrations button is
pressed offering users the opportunity to specify which test ports to include in a sequence. Only one port per test slot
should be selected, though a mixture of Port #1’s and Port #2’s across different slots is acceptable. After selected ports
are entered into the Port Selection dialog, the calibration sequence will initiate when Continue is pressed.
Averages is a configuration option supported by each of
the calibrated meters. The underlying metrologies for
these meters involves a combination of sample acquisition
and analysis that can be repeated and averaged in order to
remove effects of noise and short term digital signal
processing artifacts. In general, more averaging should
produce better statistical accuracy with a small time
penalty. It is recommended that calibrations generally be
done with high averaging, that is, either 64 or 32. In
particular, if PSD will be measured in frequencies below
1MHz, maximum 64 averaging should be specified.
An inventory of the available calibrations and associated
date-time information for the currently connected PVA
instrument will be
displayed in the
Status display area
when the Show Available Cals button is pressed (see Figure 3.36). This can be
helpful for determining age of calibrations or to see if there are any missing
calibrations. See Section 2.3.5 for further information on the actual file
locations for each calibration file.
Calibration sequencing is initiated with the Run Calibrations button. This will
produce a dialog (see Figure 3.37) diagramming the proper test cable
connections for calibration. Calibration sequences can run for long periods of
time (many minutes to over one hour)
depending upon the number of test ports,
number of calibration types, and to a lesser
extent, the amount of averaging.
Stop Calibrations will terminate calibrations
at the completion of the current calibration. All
calibrations completed up until Stop Calibrations is pressed will be stored.
3.14. Demo Mode
Demo Mode is an operating mode of PVA Interactive and PowerShell PSA software
where certain aspects and behaviors of the software can be exercised without connection to an actual PhyView
Analyzer. As was pointed out earlier in Section 3.2, when PVA Interactive (or PowerShell PSA) fails to locate a
connected PVA instrument, this mode will be invoked automatically. Demo Mode is entered by selecting the Demo
Mode checkbox in the PVA initial connection dialog, or at any time in the Chassis Selection dialog (see Figure 3.38).
Figure 3.37 Connection Reminder
Figure 3.36 Calibration Inventory for Current Instrument
Figure 3.38 Demo Mode Option
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