6: Collecting And Viewing Data Locally; Starting And Stopping Data Collection - Symmetricom 5120A Operation And Maintenance Manual

6: Collecting and Viewing Data Locally

6.1 Starting and Stopping Data Collection

After the PNTS is powered up, with Input and Reference signals connected, data collection can be
started. For information on configuring the display, see
page 31. When the required data is available, collection can be stopped.
To start data collection:
1. Ensure that the reference signal source is connected to the Reference connector (optional
for 5120A-01) and the DUT (device under test) is connected to the Input connector on the
test set.
For more information, see
2. Use one of the following methods:
Press Start on the front panel.
Right-click the current plot or table and select Control > Start from the menu.
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•
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To stop data collection:
Use one of the following methods:
Press Stop on the front panel.
Right-click the current plot or table and select Control > Stop from the menu.
•
5120A/5115A Operations and Maintenance Manual
"2.2 Setting Up a PNTS"
Note
Do not bump, vibrate, or otherwise disturb the test set or the signal cables during
operation, as this may influence the accuracy of data collection and results.
Pressing the front panel buttons other than STOP during collection could also
influence the measurement. Use of a mouse or control of the instrument via
Ethernet is recommended for best results if settings need to be changed during
collection.
The action field displays Initializing and then transitions to Collecting. See
Collecting State" on page 13 for details.
Data can be collected indefinitely. The Allan deviation plot and table display
values for averaging times up to 400,000 seconds.
The instrument automatically turns off its LCD back-light if no buttons are
pressed within 1 hour. Press any softkey or move the mouse to view the last
displayed screen.
The instrument stops collecting data, but continues to display the data it collected
on the screen. The collecting state returns to Ready.
"Chapter 5, Configuring Data Displays"
on page 7.
on
"3.2.1
53