ATS-5X User Manual
Page 33 of 44
Figure 44 – Echo Measurement Progress Display
2.7.7
Spectrum
2.7.7.1
Overview
The spectrum measurement displays the frequency spectrum of the receive signal after the filter selected in the
Setup
screen has been applied. The spectrum display is updated continuously. The units on the vertical axis are dBm instead
of dBm/Hz, and therefore the spectral display should only be used for measurements involving collections of discrete
tones and not frequency bands. However, the graph can be used to determine the relative signal levels of any time of
signal. The axis extents may be adjusted as explained in the Graph Display section. The frequency spectrum data may
be saved to a USB drive in a text file and picture file of the display.
2.7.7.2
Setup
There are no restrictions on the line interface setup for this measurement.
The following transmit modes are permitted for this measurement:
Off
1004 Hz
Single Tone
23-Tone
P/AR
2.7.7.3
Measurements and Controls
The following controls are shown on the screen:
Back
:
Return to the previous screen
Save
:
Store the 23-tone measurement results in text format and picture 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.
Pause
:
Freeze the display in its current state
Resume
:
Allow the screen to update continuously.
Setup
:
Show the
Setup
screen.
2.7.8
23-Tone
2.7.8.1
Overview
The 23-tone measurement (see Figure 45) provides a quick overview of the frequency response and distortion of a
circuit in the voice band. The ATS-5X may act as a transmitter or receiver in an end-to-end measurement setup, or as
