ATS-5X User Manual
Page 34 of 44
both simultaneously in a loop test. When acting as a transmitter, a fixed set of discrete tones is sent simultaneously in a
continuous manner. A number of measurements are performed on the receiver signal and displayed on the screen in
numerical and graphical format. The measurement results can be saved at any time to a USB drive.
Figure 45 – 23-Tone Measurement Screen
2.7.8.2
Setup
There are no restrictions on the line interface setup for this measurement.
The following transmit modes are permitted for this measurement:
Off
23-Tone
2.7.8.3
Measurements and Controls
The following measurements are shown on the screen and updated continuously:
Delay
:
A graphical representation of the envelope delay distortion over frequency. This plot shows
the change in time (or phase) delay from tone to tone.
Levels
:
A graphical display of the levels of each of the 23 tones
Rx Level
:
The combined level of all of the 23 tones
S/N
:
The ratio between the
Rx Level
and the noise excluding distortion.
S/IMD(2)
:
The ratio between the
Rx Level
and the 2
nd
-order inter-modulation products within the
voice frequency band.
S/IMD(3)
:
The ratio between the
Rx Level
and the 3
rd
-order inter-modulation products within the voice
frequency band.
S/Dist
:
The ratio between the
Rx Level
and the noise including distortion.
The following controls are shown on the screen:
Back
:
Return to the previous screen
Save
:
Store the 23-tone measurement results in text format to the USB flash inserted in the ATS-
5X USB port. If no valid drive is attached, a message is displayed to indicate this.
Setup
:
Show the
Setup
screen.
2.7.9
P/AR Measurement
2.7.9.1
Overview
The peak-to-average ratio measurement (see Figure 46) is one method of quantifying the distortion of a circuit. The
ATS-5X is capable of simultaneous transmission and measurement of the P/AR signal so that the measurement may be
