ATS-5X User Manual
Page 25 of 44
Elapsed Time
:
The duration of the last test run while in the
Impulse Noise
screen, displayed in
hour:minute:second format. If a test is in progress, the current elapsed test time is
displayed.
Holding Tone
:
The frequency of a holding tone, if present. If there is no valid holding tone, the display
shows “None”. This display is active regardless of testing status.
Tone Loss Counter
:
The number of times that a holding tone is no longer detected. This display only changes
while a test is running.
Threshold
:
The impulse threshold for counting, expressed in dBrn or dBrnC.
Test Duration
:
The specified duration of the test in hour:munute:second format.
The screen controls are listed below:
Hold Tone
:
Selects the sensitivity or holding tone level range for the duration of the test. Select “< -
10dBm” if there is no holding tone or if the holding tone signal level is not anticipated to
exceed -10 dBm. This setting has increased sensitivity for low signal levels. Select “> -
10dBm” if the holding tone level is expected to exceed -10dBm.
Threshold
:
Specifies the counting threshold. Momentary signal levels that exceed this threshold will be
counted.
Test Duration
:
The test duration in hours:minutes:seconds format.
Back
:
Return to the previous screen
Start
:
Begin the impulse noise test. This test will continue for the specified test duration or until
aborted, only while the
Impulse Noise
screen is active.
Stop
:
Abort the impulse noise test that is currently running. The accumulated test results will still
be displayed on the screen.
Save
:
Saves the current test results to a text file on the USB drive inserted into the ATS-5X. If
there is not a valid drive, a message is displayed to indicate this.
Setup
:
Show the
Setup
screen.
Figure 33 – Impulse Noise Measurement Screens
2.7.3
Longitudinal Balance
2.7.3.1
Overview
The longitudinal balance measurement is used to determine the amount of differential-mode signal that results from
common-mode influence. Refer to section 2.6.1 regarding the line connection. The
Longitudinal Balance
screen displays
the receiver signal level, the test frequency and instructions regarding connection to the circuit under test (see Figure
34). There are two measurements that must be made: one with the circuit connected to transmitter tip and ring in
