Tektronix CMD 80, User Manual

Page: 146 / 672

Analog: Manual Test (Signaling)
CMD 80 Digital Radiocommunication Tester User Manual
3–79
Figure 3–54: Analog receiver quality — harmonic distortion menu
A test result is highlighted if the harmonic distortion percentage exceeds the
limit that you specified in the HARMONIC DISTORTION configuration menu
(refer to HARMONIC DISTORTION on page 3–126).
NOTE
. The display of the test results may toggle between normal and highlighted
if you have set AUTO STOP to OFF in the HARMONIC DISTORTION configu-
ration menu.
While in this menu, you can vary the following parameters of the base station:
H
Power. Press the POWER softkey to set the level of the base station
transmitter power.
H
Modulation peak deviation. Press the MOD PEAK DEVIATION softkey to
set the deviation used to modulate the test tone in the RF output of the tester.
You can also use this softkey to turn off the modulation peak deviation.
NOTE . The tester performs the harmonic distortion measurement only when the
audio peak deviation is within the limits set in the HARMONIC DISTORTION
configuration menu (refer to HARMONIC DISTORTION on page 3–126).
Changing the preceding values in this menu changes the initial values that you
set in the HARMONIC DISTORTION configuration menu.
AUDIO FREQ RESPONSE.
Press the AUDIO FREQ RESPONSE softkey to
measure the audio frequency response of the mobile receiver in the normal mode.