Symmetricom 5115A, Руководство по эксплуатации и обслуживанию

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14 3: The Screen and Basic Concepts
The screen always shows the currently connected signals’ frequency and power. When a data set is
printed, the frequency and power at the time the printed data set was collected is output. If data are
collected with 5 MHz signals on both ports, and the reference is replaced with a 10 MHz signal,
the screen shows 5 and 10 MHz, while a printout correctly shows 5 MHz for both signals.
3.2.3 User in Control
The phase noise test set can be controlled in two ways:
„
with front panel buttons, a mouse and/or a keyboard.
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via a network connection on an Ethernet network.
This makes it possible for two different users to interfere with one another. A network user could
start a long term collection, only to have another user walk up to the front panel of the test set and
press the
Stop button minutes later. These users are named from the test set’s perspective. The
network user is referred to as the Remote user, and the person using the front panel is called the
Local user.
To avoid interference between Local and Remote users, certain operations and configuration
settings require that the user wishing to perform them be in control of the test set (or willing to take
control). The user who is in control of the test set is identified in the top right corner of
Figure 3 .
The figure shows that the Local user has initiated data collection. If a Remote user were to issue
the stop command, they would receive a warning reminding them that they are not in control of the
test set. At this point the remote user can take control from the local user. See
“7.2.1 Taking or
Yielding Remote Control” on page 58 for details on taking Remote control.
When the test set is powered on neither user is in control. The first user to execute a command or
make a setting which requires control of the test set implicitly takes control. If the
Local user were
to press the Start button on the front panel, they would automatically take control of the test set.
When neither user is in control the label in the top right corner of the main screen is blank.
When the user who is controlling the test set is finished, they can relinquish control to reenter the
state described in the previous paragraph. See
“6.3 Taking or Yielding Local Control.” on page 55
and “7.2.1 Taking or Yielding Remote Control” on page 58 for further instructions.
3.2.4 User Specified Title
A short string shown in the bottom right corner of Figure 3 can be entered using a USB keyboard
or set on the network interface. One title may be assigned at a time. The title appears on all
printouts and can thus be used to correlate data sets, identify the owner or input signal sources. The
title can be up to 34 characters long.
The title can be set by the Local user only if a keyboard is attached to the test set.
To set the user specified title:
1. Press the ‘T’ key on the keyboard.
2. Enter a title of up to 34 characters using the keyboard in the dialog box.
3. Press the ‘Enter’ key on the keyboard, or the Apply softkey to commit the new title.
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The new title appears at the bottom right of the main screen and will be output at the
bottom of all future printouts.
The user specified title can also be set using a network command connection, see “7.2.8 Setting the
User Specified Title” on page 64.